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Carbohydrates
1. The change in optical rotation, with time, of freshly prepared solution of sugar is known as [CPMT 1982, 85; BHU 1997] (a) Rotatory motion (b) Inversion (c) Specific rotation (d) Mutarotation 2. Gun-cotton is (a) Nitrosucrose (b) Nitrocellulose (c) Nitroglucose (d) Nitropicrin 3. Which of the following monosaccharide is a pentose [CPMT 1982, 87, 89, 93] (a) Galactose (b) Glucose (c) Fructose (d) Arabinose 4. Amide group is present in (a) Lipids (b) Carbohydrates (c) Amino acids (d) Proteins 5. Which of the following is a carbohydrate (a) Leucine (b) Albumin (c) Inulin (d) Maltase 6. General formula for carbohydrates is (a) Cn H 2 nO 2 n 2 (b) Cx ( H 2 O ) 2 x (c) C (^) x ( H 2 O ) y (d) None of these 7. Benedict solution provides [CPMT 1983] (a) Ag (b) Li (c)^ Cu ^2 (d)^ Ba ^2 8. Glucose gives silver mirror with Tollen's reagent. It shows the presence of [MNR 1981; CPMT 1974, 81; MP PMT 1994] (a) An acidic group (b) An alcoholic group (c) A ketonic group (d) An aldehydic group 9. A certain compound gives negative test with ninhydrin and positive test with Benedict's solution. The compound is [NCERT 1978; KCET 2000] (a) A protein (b) A monosaccharide (c) A lipid (d) An amino acid 10. An organic compound answers Molisch's test as well as Benedict's test. But it does not answer Scliwanoff's test. Most probably, it is [KCET 2003] (a) Sucrose (b) Protein (c) Fructose (d) Maltose 11. Glucose when heated with CH 3 OH in presence of dry HCl gas gives and methyl glucosides because it contains [CPMT 1982, 85] (a) An aldehyde group (b) A CH (^) 2 OH group
(c) A ring structure (d) Five hydroxyl groups
12. Which one is a disaccharide [CPMT 1981, 83] (a) Glucose (b) Fructose (c) Xylose (d) Sucrose 13. Molecular formula C 6 H 12 O 6 is of (a) Glucose (b) Fructose (c) Both (a) and (b) (d) None of these 14. Hydrolysis of sucrose is called [BHU 1979, 83; Pb. PMT 1999; Pb. CET 2000] (a) Esterification (b) Saponification (c) Inversion (d) Hydration 15. In the ' glycolipids ', the two sugars known to occur are glucose and (a) Fructose (b) Lactose (c) Galactose (d) Sucrose 16. The ‘ epimerisation ’ involves (a) Change of configuration (b) Addition of one more ' C ' (c) Substration of a ' C ' (d) Conversion of CHO to C O 17. The compound which does not contain an asymmetric carbon atom is (a) Glycolaldehyde (b) Glyceraldehyde (c) Glucose (d) Galactose 18. Which of the following sign indicate that the sugar is actually ‘ dextrorotatory ’ (a) – (b) + (c) R – (d) All of these 19. The standard compound for determination of configuration in the ‘ sugar chemistry ’ is (a) Glycolaldehyde (b) Glyceraldehyde (c) Glucose (d) Fructose 20. Sugars are (a) Optically active polyhydroxy aldehydes (b) Optically active polyhydroxy ketones (c) Optically active polyhydroxy aldehydes or ketones (d) Polyhydroxy aldehydes or ketones which may or may not be optically active 21. Molecular formula of pentahydroxy acid obtained when glucose is oxidised with Br 2 water is (a) C 6 H 12 O 7 (b) C 6 H 12 O 8 (c) C 6 H 12 O 6 (d) C 6 H 10 O 6 22. The ' phosphoglycerides ' occur in (a) The brain and the spinal chord (b) Nails and hairs (c) Oils and fats (d) Waxes 23. Sucrose is a [CPMT 1983] (a) Monosaccharide (b) Disaccharide
(c) Trisaccharide (d) Polysaccharide
24. The commonest disaccharide has the molecular formula [CPMT 1982; Manipal MEE 1995; MP PET 1999; AIIMS 1999] (a) C 10 H 18 O 9 (b) C 10 H 20 O 10 (c) (^) C 18 H 22 O 11 (d) C 12 H 22 O 11 25. On complete hydrolysis of starch, we finally get [MNR 1982; DPMT 1979; CBSE PMT 1991; MP PMT 1987; MP PET 1993] (a) Glucose (b) Fructose (c) Glucose and fructose (d) Sucrose 26. Which is monosaccharide (a) Glucose (b) Fructose (c) Galactose (d) All of these 27. Which is polysaccharide (a) Starch (b) Cellulose (c) Glycogen (d) All of these 28. The calorific values of fats, carbohydrates and proteins vary in the order (a) Fats > Carbohydrates > Proteins (b) Fats > Proteins > Carbohydrates (c) Carbohydrates > Proteins > Fats (d) Proteins > Carbohydrates > Fats 29. Gun-cotton is obtained when conc. nitric acid reacts with (a) Glycerine (b) Glycol (c) Cellulose (d) Starch 30. A carbohydrate consists of [NCERT 1971] (a) C and O (b) C , H and O (c) C , H , N and O (d) C and H 31. Glucose forms many derivatives. The derivative which will help to prove the furanose structure is [AIIMS 1980; DPMT 1985] (a) Acetyl (b) Benzoyl (c) Osazone (d) Isopropylidene 32. Glucose and fructose form [MP PMT 1986] (a) Same osazone (b) Same acid on oxidation (c) Same alcohol when reduced (d) Different osazone 33. On heating with conc. H 2 SO 4 ,sucrose gives [DPMT 1984] (a) CO and CO 2 (b) CO and SO 2 (c) (^) CO , CO 2 and (^) SO 2 (d) None of these 34. The letter ‘ D ’ in carbohydrates represents (a) Its direct synthesis (b) Its dextrorotation (c) Its mutarotation (d) Its configuration 35. Starch can be used as an indicator for the detection of traces of [CPMT 1986]
(a) Glucose in aqueous solution (b) Protein in blood (c) Iodine in aqueous solution (d) Urea in blood
36. It is best to carry out reactions with sugars in neutral or acid medium and not in alkaline medium. This is because in alkaline medium sugars undergo one of the following changes [AIIM (a) Racemisation (b) Decomposition (c) Inversion (d) Rearrangement 37. Which one of the following compounds is found abundantly in nature [BHU 1983; Manipal MEE 1995; DCE 2004] (a) Fructose (b) Starch (c) Glucose (d) Cellulose 38. The substance that forms the plant cell walls is or Which carbohydrates is an essential constituents of plant cells [KCET 1984; MP PET 1999; CPMT 2002] (a) Cellulose (b) Sucrose (c) Vitamins (d) Starch 39. Sugar can be tested in urine by (a) Molisch test (b) Dunstan's test (c) Benedict's test (d) Legal's test 40. When sucrose is heated with conc. HNO 3 the product is [CPMT 1979] (a) Sucrose nitrate (b) Formic acid (c) Oxalic acid (d) Citric acid 41. Amylopectin is [KCET 2005] (a) Water soluble (b) Water insoluble (c) Forms colloidal solution with water (d) Both (b) and (c) 42. Which of the following statements about ribose is incorrect [CPMT 1985] (a) It is a polyhydroxy compound (b) It is an aldehyde sugar (c) It has six carbon atoms (d) It exhibits optical activity 43. Maltose contains how many oxygen atoms (a) 6 (b) 10 (c) 11 (b) 22 44. The correct name of ‘sucrose ' is (a) D glucopyran osyl D fructofuranoside (b) D glucopyran osyl D fructofuranoside (c) D glucopyran osyl D fructofuranoside (d) D glucopyran osyl L fructofuranoside 45. Sucrose is (a) Laevorotatory (b) Dextrorotatory (c) Racemic mixture (d) Optically inactive
(c) (^) H 2 O and (^) CO 2 (d) None of these
69. Osazone formation involves only 2 carbon atoms of glucose because of [MP PMT 1986] (a) Chelation (b) Oxidation (c) Reduction (d) Hydrolysis 70. Glucose will show mutarotation when solvent is [MP PMT 1986] (a) Acidic (b) Basic (c) Neutral (d) Amphoteric 71. Glucose contains [CPMT 1982] (a) One CHO group (b) Five OH groups (c) One primary alcoholic group (d) Four secondary alcoholic groups (e) All are correct 72. Carbohydrates are stored in human body as [MP PMT 1999; Kerala PMT 2004] (a) Glucose (b) Glycogen (c) Starch (d) Fructose 73. An example of a disaccharide made up of two units of the same monosaccharides is [KCET 1989; MP PET 1996; AFMC 2005] (a) Sucrose (b) Maltose (c) Lactose (d) None of these 74. The sugar present in fruits is [KCET 1984] (a) Fructose (b) Glucose (c) Sucrose (d) Galactose 75. Carbohydrates are [MADT Bihar 1983] (a) Hydrates of carbon (b) Polyhydroxy aldehydes or ketones (c) Polyhydroxy acid compounds (d) None of these 76. Glucose and fructose are [Bihar MADT 1982] (a) Isotopes (b) Isotones (c) Isomers (d) Homologues of each other 77. Hydrolytic conversion of sucrose into glucose and fructose is known as [BHU 1979, 97] (a) Induction (b) Saponification (c) Inversion (d) Esterification 78. Starch is a polymer of [DPMT 1982; CPMT 1975, 80; MP PMT 1994] (a) Glucose (b) Fructose (c) Both (a) and (b) (d) None of these 79. To become a carbohydrate a compound must contain at least [AFMC 1991]
(a) 2 carbons (b) 3 carbons (c) 4 carbons (d) 6 carbons
80. Lactose on hydrolysis gives [KCET 1983] (a) Two glucose molecules (b) Two galactose molecules (c) A galactose molecule and a fructose molecule (d) A galactose molecule and a glucose molecule 81. An example of non-reducing sugar is [KCET 1988] (a) Cane sugar (b) Fructose (c) Lactose (d) Cellobiose 82. Cellulose is a polymer of [KCET 1984] (a) L-fructose (b) D-mannose (c) D-glucose (d) Amylose 83. The intermediate compound formed in the conversion of starch to glucose is [KCET 1984] (a) Lactose (b) Sucrose (c) Maltose (d) Fructose 84. Invertase brings about the conversion of [KCET 1986] (a) Starch to glucose (b) Sucrose to glucose and fructose (c) Maltose to glucose (d) Glucose to C (^) 2 H 5 OH and CO 2 85. Which of the following pentoses will be optically active
I
CHOH
HCOH
HOCH
HCOH
CHO
2
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II
CHOH
HOCH
HCOH
HCOH
CHO
2
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III
CHOH
HCOH
HCOH
HCOH
CHO
2
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[MP PET 1994] (a) All (b) II and III (c) I (d) II
86. D glucose and D glucose differ from each other due to difference in one of the carbons with respect to its [CBSE PMT 1995; AFMC 1999] (a) Size of hemiacetal ring (b)Number of OH groups (c) Configuration (d) Conformation 87. Which carbohydrates has highest abundance in human blood [MP PET 1995] (a) d - fructose (b) d - glucose (c) Sucrose (d) Lactose 88. Formation of silver mirror by glucose shows that it is a/an
(a) Oxidising agent (b) Acid (c) Reducing agent (d) A salt of silver
89. Which of the following statements is right (a) Cellulose are linear polymers of glucose molecules with 1 , 4 linkages (b) Starches are polymers of glucose molecules with 1 , 4 linkages and some 1 , 6 ^ cross-linkages (c) Proteins are polyamides of amino acids (d) The structural information about their biosynthesis is contained in a class of compounds called nucleic acids, e.g. RNA and DNA 90. The number of atoms in the cyclic structure of D- fructose is [MP PMT 1997] (a) 5 (b) 6 (c) 4 (d) 7 91. Which is used in motion picture films (a) Cellulose acetate (b) Glucose acetate (c) Starch acetate (d) Sucrose acetate 92. Glucose reacts with acetic anhydride to form [KCET 1996] (a) Mono-acetate (b) Tetra-acetate (c) Penta-acetate (d) Hexa-acetate 93. Which of the following does not show any reducing test of aldehyde [CPMT 1996; Orissa JEE 2004] (a) Sucrose (b) Fructose (c) Maltose (d) Lactose 94. When amylases catalyse the hydrolysis of starch, the final product obtained is chiefly [Pb. PMT 1998] (a) Cellobiose (b) Glucose (c) Maltose (d) Sucrose 95. Galactose is converted into glucose in [AFMC 1998] (a) Mouth (b) Stomach (c) Liver (d) Intestine 96. Which among the following is the simplest [CPMT 1999] (a) Glucose (b) Cellulose (c) Starch (d) None of these 97. Indigestible carbohydrate, which is also a constituent of our diet, is [Kerala (Med.) 1999] (a) Cellulose (b) Galactose (c) Maltose (d) Starch 98. Starch is converted into maltose by the [DPMT 1979; CPMT 1982; BHU 1999] (a) Maltase (b) Invertase (c) Zymase (d) Diastase 99. The disaccharide present in milk is
[CPMT 1982, 87, 91; MP PET 2001] (a) Maltose (b) Lactose (c) Sucrose (d) Cellobiose
100. Carbohydrates are used by body mainly [DCE 1999] (a) For obtaining vitamins (b) As source of energy (c) For all its developmental needs (d) For building muscles 101. In the viscose process the solvent for cellulose consists of [JIPMER 1999] (a) Ether and alcohol (b) Copper sulphate and ammonia (c) Sodium hydroxide and carbon disulphide (d) Acetic acid and acetic anhydride 102. Which of the following does not reduce Benedict's solution [KCET 2000] (a) Sucrose (b) Aldehyde (c) Glucose (d) Fructose 103. In polysaccharides the linkage connecting monosaccharide units is called [MP (a) Glycoside linkage (b) Nucleoside linkage (c) Glycogen linkage (d) Peptide linkage 104. Blood sugar is the same as [DPMT 2000] (a) Glucose (b) Galactose (c) Glycogen (d) Fructose 105. Glucose has functional group [MH CET 2000] (a) Aldehydic (b) Aldehydic and alcoholic (c) Alcoholic (d) Ketonic and alcoholic 106. Which of the following is an aldohexose [KCET (Engg.) 2001] (a) Cellulose (b) Sucrose (c) Glucose (d) Raffinose 107. The calorific value is maximum in case of [Kerala (Med.) 2000] (a) Milk (b) Proteins (c) Minerals (d) Carbohydrates 108. An invert sugar is [AFMC 2000] (a) Isorotatory (b) Dextrorotatory (c) Laevorotatory (d) Optically inactive 109. The change in optical rotation with time of freshly prepared solutions of sugar is known as [JIPMER 2000] (a) Maturation (b) Rotatory motion (c) Inversion (d) Specific rotation
(a) 12 (b) 8 (c) 16 (d) 4
132. If an aqueous solution of glucoseis allowed to freeze than crystal of which will be separated out first [DPMT 2005] (a) Glucose (b) Water (c) Both of these (d) None of these 133. Which is false [J & K 2005] (a) Glucose is a disaccharide (b) Starch is a polysaccharide (c) Glucose and fructose are not anomers (d) Invert sugar consists of glucose and fructose
Proteins, Amino Acids and Enzymes
1. Insulin is [CBSE PMT 1991] (a) An amino acid (b) Protein (c) A carbohydrate (d) A lipid 2. Peptides are (a) Esters (b) Salts (c) Amides (d) Ketones 3. The proteins which are insoluble in water are (a) Fibrous proteins (b) Globular proteins (c) Both (a) and (b) (d) None of these 4. Irreversible precipitation of proteins is called (a) Denaturation (b) Hydrolysis (c) Rearrangement (d) Electrophoresis 5. The proteins with a prosthetic group are called (a) Pseudo proteins (b) Complex proteins (c) Conjugated proteins (d) Polypeptides 6. The prosthetic group of haemoglobin is (a) Porphin (b) Haem (c) Globin (d) Globulin 7. When collagen is boiled with water, it forms (a) Precipitate (b) Solution (c) Gelatin (d) Complex collagen 8. Which of the following is not essential amino acid (a) Valine (b) Lysine (c) Histidine (d) Glycine 9. Amino acids are (a) Liquids (b) Volatile solids (c) Non-volatile crystalline compounds (d) Mixture of amines and acids 10. Isoelectric point is a (a) Specific temperature (b) Suitable concentration of amino acid
(c) Hydrogen ion concentration that does not allow migration of amino acid under electric field (d) Melting point of an amino acid under the influence of electric field
11. Proteins are hydrolysed by enzymes into [CPMT 1981; BHU 1987; MP PMT 1994, 2002] (a) Dicarboxylic acids (b) Hydroxy acids (c) Amino acids (d) Aromatic acids 12. Proteins when heated with conc. HNO 3 give a yellow colour. This is [CPMT 1989] (a) Oxidising test (b) Xanthoprotic test (c) Hoppe's test (d) Acid-base test 13. Enzymes are [DPMT 1980; MP PMT 1993, 96] (a) Proteins (b) Minerals (c) Oils (d) Fatty acids 14. Proteins are built up of [CPMT 1981, 99; BHU 1987; CBSE PMT 2001; MP PMT 1987, 96; KCET 1984] (a) Dicarboxylic acids (b) Amino acids (c) Alcohols (d) Hydroxy acids 15. The main structural feature of proteins is [MNR 1987; MP PET 1993, 97, 2004] (a) The ester linkage (b) The ether linkage (c) The peptide linkage (d) All of these 16. Pepsin enzyme hydrolyses [NCERT 1984; MP PET 1999; MP PMT 2001] (a) Proteins to amino acids (b) Fats to fatty acids (c) Glucose to ethyl alcohol (d) Polysaccharides to monosaccharides 17. Which one of the following proteins transports oxygen in the blood stream [MP PMT 199 (a) Myoglobin (b) Insulin (c) Albumin (d) Haemoglobin 18. Enzymes are [MP PET 1993] (a) Living organisms (b) Dead organisms (c) Complex nitrogenous substances produced in living cells (d) None of these 19. Which is an essential constituent of diet [AFMC 1980] (a) Starch (b) Glucose (c) Carbohydrate (d) Protein 20. Proteins can be used (a) As food (b) In textile (c) As enzyme (d) All of these
21. Which of the following foodstuffs contains nitrogen [DPMT 1986; MH CET 2002] (a) Carbohydrates (b) Fats (c) Proteins (d) None of these 22. pH in stomach is approximately (a) 7 (b) 2. (c) 6.5 (d) 10 23. The helical structure of proteins is established by [CPMT 1988] (a) Peptide bonds (b) Dipeptide bond (c) Hydrogen bond (d) Vander Waal's forces 24. Natural silk is a (a) Polyester (b) Polyamide (c) Polyacid (d) Polysaccharide 25. Protein contains [CPMT 1975; MP PMT 2002] (a) C , H , O and N (b) Only C and H (c) Cl , H and O (d) All of these 26. The end product of protein digestion is [CPMT 1981; KCET 1984] (a) Amino acid (b) Glucose (c) Glycerol (d) Oxalic acid 27. Protein can be most easily removed from [MNR 1988] (a) Alkanes (b) Alkenes (c) Alkynes (d) Benzene 28. Which of the following contains the highest percentage of protein [CPMT 1984] (a) Groundnut (b) Cow's milk (c) Egg (d) Wheat 29. The enzyme ptylin used for the digestion of food is present in [CPMT 1981; Pb. PMT 2004] (a) Saliva (b) Blood (c) Intestines (d) Adrenal glands 30. Which one of the following is an amino acid [KCET 1984] (a) CH 3 CONH 2 (b) CH 3 CONHCH 3 (c) CH 3 NHCHO (d) NH (^) 2 CH 2. COOH 31. Biuret test is used for the detection of [KCET 1993] (a) Saturated oils (b) Sugars (c) Proteins (d) Fats 32. Out of the following the best category of proteins is [SCRA 1991] (a) Polyamides (b) Polythioethers (c) Glycerides (d) Polysaccharides 33. The molecular weight of protein is [KCET 1984] (a) < 10000 (b) > 10000 (c) > 1000 (d) > 1000 and < 10000 34. Which of the following is not a classification of proteins [KCET 1984] (a) Enzymes (b) Antibodies (c) Antigens (d) Hormones 35. The protein that is a structural material is [KCET 1984] (a) Albumin (b) Oxytocin (c) Haemoglobin (d) Keratin 36. For amino acids having the structure COH NH
R CH 2 2
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Which of the following statements are true (A) Water solubility is maximum at a pH when concentrations of anions and cations are equal (B) They give ninhydrin test (C) On reacting with nitrous acid give off N 2 [MP PET 1994] (a) All (b) B and C (c) A and B (d) A
37. Which of the following reacts with haemoglobin in the blood to form carboxyhaemoglobin [Manipal MEE 1995] (a) CO (b) CO 2 (c) HCOOH (d) H 2 CO 3 38. Secondary structure of a protein refers to [CBSE PMT 1995] (a) Mainly denatured proteins and structures of prosthetic groups (b) Three dimensional structure, specially the bond between amino acid residues that are distant from each other in the polypeptide chain (c) Linear sequence of amino acid residues in the polypeptide chain (d) Regular folding patterns of continuous portions of the polypeptide chain 39. Of the following statements about enzymes which ones are true (i) Enzymes lack in nucleophilic groups (ii) Enzymes are highly specific both in binding chiral substrates and in catalyzing their reactions (iii) Enzymes catalyse chemical reactions by lowering the activation energy (iv) Pepsin is a proteolytic enzyme [CBSE PMT 19 (a) (i) and (iv) (b) (i) and (iii) (c) (ii), (iii) and (iv) (d) (i) 40. Proteins are composed of [MP PMT 1995; J & K 2005] (a) amino acids (b) Carbohydrates (c) Vitamins (d) Mineral salts
(b) The basic group NH 3 and the acidic group CO 2 (c) The basic group CO 2 and the acidic group NH 3 (d) No acidic or basic group
60. The most important energy carrier in all the living cells is [MP PET 2000; KCET 2000] (a) AMP (b) ATP (c) ADP (d) UDP 61. The 10% energy transfer law of food chain was given by [BHU 2000] (a) Stanley (b) Weismann (c) Lindemann (d) Tansley 62. Which of the following is a conjugated protein [BHU 2000] (a) Glycoprotein (b) Phosphoprotein (c) Chromoprotein (d) All of these 63. The number of essential amino acids in man is [CBSE PMT 2000] (a) 8 (b) 10 (c) 18 (d) 20 64. Pick out wrong combination [DCE 2000] (a) Fe ^2 Haemoglobin (b) Mg^2 Photosynthesis (c) Se^2 Kreb Cycle (d) CO ^2 Vitamin B- 12 65. The decomposition of complex organic compounds into simpler compound with the help of enzyme is known as [Pb. PMT 2000] (a) Catabolism (b) Anabolism (c) Fermentation (d) Metabolism 66. A biological catalyst is essentially [Pb. PMT 2000; BHU 2004] (a) A carbohydrates (b) An amino acids (c) A nitrogen molecule (d) Fats 67. The test used for identifying peptide linkage in proteins is [KCET (Engg.) 2001] (a) Borsche's test (b) Molisch's test (c) Ninhydrin test (d) Biuret test 68. Which of the following is not a function of proteins [MP PMT 2001] (a) Nails formation
(b) Skin formation (c) Muscle formation (d) Providing energy for metabolism
69. The helical structure of proteins is stabilized by [MP PMT 2001] (a) Peptide bonds (b) Dipeptide bond (c) Hydrogen bond (d) Vander Waal's forces 70. The optically inactive amino acid is [MP PMT 2001; BHU 2005] (a) Lysine (b) Glycine (c) Arginine (d) Alanine 71. Which amino acid can cross link peptide chains [AIIMS 2001] (a) Serine (b) Cysteine (c) Glutamine (d) Tyrosine 72. Amino acids are the building blocks of [MH CET 2001] (a) Fat (b) Vitamin (c) Protein (d) Carbohydrate 73. Which of the following protein destroys the antigen when it enters in body cell [AIIMS 2001; Pb. PMT 2004 ] (a) Antibodies (b) Insulin (c) Chromoprotein (d) Phosphoprotein 74. An antibiotic with a broad spectrum [AFMC 2001] (a) Kills the antibodies (b) Acts on a specific antigen (c) Acts on different antigents (d) Acts on both the antigens and antibodies 75. Antibodies are [CBSE PMT 2001] (a) Carbohydrate (b) Globular protein (c) Immunoglobulins (d) Cellulose compounds 76. Excess of^ Na ions in our system causes [BHU 2001] (a) High B.P. (b) Low B.P. (c) Diabetes (d) Anaemia 77. The example of a protein is [MP PET 2003] (a) Narvone (b) Lacithin (c) Cellulose (d) Insulin 78. Enzymes are made up of [CBSE PMT 2002] (a) Carbohydrates (b) Edible proteins (c) Nitrogen containing carbohydrates (d) Proteins with specific structure 79. Chlorophyll contains [RPMT 2002] (a) Fe (b) Na (c) Mg (d) Zn 80. Which one of the following biomolecules is insoluble in water [AIIMS 2005] (a) - Keratin (b) Haemoglobin
(c) Ribonuclease (d) Adenine
81. A nanopeptide contains …….. peptide linkages [KCET 2005] (a) 10 (b) 8 (c) 9 (d) 18 82. Identify the incorrect statement [Kerala (Med.) 2003] (a) An octa deca peptide contains 18 amino acid residues and 17 peptide bonds (b) Addition of an inert gas into a system in thermodynamic equilibrium for the dissociation of PCl 5 shifts the equilibrium to the left. (c) When gold dissolves in aquaregia the complex formed is chloroauric acid (d) In the extraction of aluminium purified bauxite is dissolved in molten fluorospar (e) If the pH value of a solution is to be decreased from 5 to 3, the hydrogen ion concentration must be increased twice the initial value. 83. -helix is found in [Kerala (Engg.) 2002] (a) DNA (b) RNA (c) Lipid (d) Protein 84. The main structural of protein is [UPSEAT 2000, 02] (a) The ester linkage (b) The ether linkage (c) The peptide linkage (d) All of these 85. Among the following, the achiral amino acid is [AIIMS 2003] (a) 2 - Ethylalanine (b) 2 - Methylglycine (c) 2 - Hydroxymethyl serine (d) Tryptophan 86. Which of the following could act as a propellant or rockets [CBSE PMT 2003] (a) Liquid hydrogen + liquid nitrogen (b) Liquid oxygen + liquid argon (c) Liquid hydrogen + liquid oxygen (d) Liquid nitrogen +liquid oxygen 87. Which amino acid has aromatic ring [CPMT 2003] (a) Alamine (b) Glycine (c) Tyrosine (d) Lysine 88. The pH value of the solution in which a particular amino acid does not migrate under the influence of an electric field in called the [Kerala (Med.) 2003] (a) Eutectic point (b) Yielding point (c) Neutralisation point (d) Effusion (e) Isoelectric point 89. Which part of the protein molecule is responsible for function and activity of the proteins [AMU 2002] (a) Secondary structure (b) Peptide bond (c) Primary structure (d) Binding sites 90. The Structural formula of an amino acid, isoleucine is [MP PMT 2003]
(a) OOH
NH CH CHC
2 3
| .
(b) 3
(^3) | 2 . CH
CH CHCOOH
CH NH
(c) 2 5
(^3) | 2 . C H
CH CHCOOH
CH NH
(d) 2 5
(^25) | 2 . C H
CH CHCOOH
CH NH
91. The process by which synthesis of protein takes place based on the genetic information present in m - RNA is called [KCET 2003; Kerala CET 2005] (a) Translation (b) Transcription (c) Replication (d) Messenger hypothesis 92. Which of the following is used in our body as a fuel for muscles and nerves and to build and repair body tissues? [DCE 2003] (a) Cane sugar (b) Fructose (c) Proteins (d) Glucose 93. Which enzyme convert glucose into alcohol [Pb. CET 2003] (a) Invertase (b) Zymase (c) Maltase (d) Diastase 94. Which one of the following structures represents the peptide chain [CBSE PMT 2004; CPMT 2003; DCE 2002; MP PET 1994; Bihar MEE 1997; Orissa JEE 1997]
(a)
O
C C
H
N
O
C C
H
N
O
C C
H
N
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(b)
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| C C O
C
H
C C N
H
N
O
C C C
H
N
(a) Proteins (b) Fats (c) Carbohydrates (d) Vitamins
14. Cell membrane contains (a) Alternate layers of phospholipid and coline (b) Double layers of phospholipid (c) Double layers of phospholipid with polar ends projected outside (d) Double layers of phospholipid with polar ends projected inside 15. Which of the following compounds do not belong to lipids [AFMC 1998] (a) Fats (b) Amino acids (c) Phospholipids (d) Carbohydrates 16. Which is not a macromolecule [BHU 1998] (a) DNA (b) Starch (c) Palmitate (d) Insulin 17. A distinctive and characteristic functional group of fats is [Kerala (Med.) 1999; AFMC 2005] (a) An ester group (b) A peptide group (c) A ketonic group (d) An alcoholic group 18. The waxes are long chain compounds of fatty acids, which belong to the class of [BHU 1999; AFMC 2005] (a) Esters (b) Ethers (c) Alcohols (d) Acetic acid 19. Hydrolytic reaction of fats, with caustic soda, is known as [Kerala (Med.) 2000; Pb. PMT 2004; MNR 1988] (a) Acetylation (b) Carboxylation (c) Saponification (d) Esterification 20. Fat consists of [MH CET 2002] (a) Monohydroxy carboxylic acid (b) Monohydroxy aliphatic carboxylic acid (c) Monohydroxy aliphatic, saturated carboxylic acid (d) Dihydroxy aliphatic carboxylic acid 21. The alcohol obtained by the hydrolysis of oils and fats is [KCET 2001] (a) Glycol (b) Glycerol (c) Propanol (d) Pentanol 22. Iodine value is related to [MP PET 2002] (a) Fats and oils (b) Alcohols (c) Esters (d) Hydrocarbons 23. Phospholipids are esters of glycerol with [CBSE PMT 2003] (a) Three phosphate groups
(b) Three carboxylic acid residues (c) Two carboxylic acid residues and one phosphate group (d) One carboxylic acid residue and two phosphate groups
24. Oils and fats are jointly called [MP PET 2003] (a) Lipids (b) Soaps (c) Proteins (d) Polymer
25.
RCOOH
RCOOH
RCOOH
CHOH
CHOH
CHOH
CHOOCR
CHOOCR
CHOOCR
2
2
| Hy droly sis |
Enzy me
2
2
| |
"
The enzyme used in the above reaction is [AMU 2003] (a) Amylase (b) Lactase (c) Lipase (d) Invertase
26. Oleic, stearic and palmitic acids are [Pb. CET 2002] (a) Fatty acid (b) Amino acid (c) Nucleic acid (d) Essential acid 27. An example for a saturated fatty acid, present in nature is [KCET 2005] (a) Oleic acid (b) linoleic acid (c) Linolenic acid (d) Palmitic acid
Vitamin, Harmone and Nucleic acid
1. A nucleotide consists of (a) Base and sugar (b) Base and phosphate (c) Sugar and phosphate (d) Base, sugar and phosphate 2. Which of the following is responsible for heredity character (a) DNA (b) RNA (c) Proteins (d) Hormones 3. The base adenine occurs in [MP PMT 1995] (a) DNA only (b) RNA only (c) DNA and RNA both (d) Protein 4. The protein which maintains blood sugar level in the human body [KCET 1993; MP PMT 1995] (a) Haemoglobin (b) Oxytocin (c) Insulin (d) Ptyalin 5. Which of the following statements about the assembly of nucleotides in a molecule of deoxyribose nucleic acid (DNA) is correct [Man (a) A pentose of one unit connects to a pentose of another (b) A pentose of one unit connects to the base of another (c) A phosphate of one unit connects to a pentose of another
(d) A phosphate of one unit connects to the base of another
6. Vitamin A is present in [MP PET 1995, 2000] (a) Cod liver oil (b) Carrot (c) Milk (d) In all of these 7. Ascorbic acid is a [Bihar CEE 1995; MP PET 1995] (a) Vitamin (b) Enzyme (c) Protein (d) Carbohydrate 8. The chemical name of vitamin C is [J & K 2005] (a) Ascorbic acid (b) Folic acid (c) Nicotinic acid (d) Tartaric acid 9. Which of the following is not a constituent of RNA [MP PET 1996] (a) Ribose (b) Phosphate (c) Adenine (d) Pyridine 10. Which one is found in ATP ribonucleotide (a) Guanine (b) Uracil (c) Adenine (d) None of these 11. Which of the following proteins acts as a messenger in living system (a) Harmone (b) Enzyme (c) Protective protein (d) Transport protein 12. Which substance is not present in nucleic acid [MP PET/PMT 1998] (a) Cytosine (b) Adenine (c) Thymine (d) Guanidine 13. The deficiency of vitamin B 1 causes [CPMT 1994; MP PMT 1999; BHU 2000] (a) Beri-beri (b) Scurvy (c) Rickets (d) Anaemia 14. Which of the following is not present in nucleic acids [MP PMT 1999] (a) Uracil (b) 2 - aminopyridine (c) Thymine (d) Adenine 15. In nucleic acids, the sequence is [AIIMS 1996] (a) Base-phosphate-sugar (b)Phosphate-base-sugar (c) Sugar-base-phosphate (d)Base-sugar-phosphate 16. The segment of DNA which acts as the instructional manual for the synthesis of the protein is [Pb. PMT 1998] (a) Nucleoside (b) Nucleotide (c) Ribose (d) Gene 17. The double helical structure of DNA was proposed by [KCET 1998] (a) Watson and Crick (b) Meicher (c) Emil Fischer (d) Khorana 18. A segment of DNA molecule which codes or specifies for one polypeptide chain is called [KCET 1998] (a) Phosphate group (b) Adenine
(c) Gene (d) Amino acid
19. In DNA, the complementary bases are [CBSE PMT 1998] (a) Uracil and adenine; cytosine and guanine (b) Adenine and thymine; guanine and cytosine (c) Adenine and thymine; guanine and uracil (d) Adenine and guanine; thymine and cytosine 20. The structure of DNA is [AFMC 1999] (a) Linear (b) Single helix (c) Double helix (d) Triple helix 21. Vitamin (^) B 1 is [MP PMT 2000] (a) Riboflavin (b) Cobalamin (c) Thiamine (d) Pyridoxine 22. A gene is a segment of a molecule of [AIIMS 1999] (a) DNA (b) m - RNA (c) t - RNA (d) Protein 23. The deficiency of vitamin- C causes [MP PMT 2000; CPMT 2000] (a) Scurvy (b) Rickets (c) Pyrrohea (d) Pernicious Anaemia 24. DNA contains the sugar [MP PMT 2000] (a) Deoxyribose (b) Ribose (c) D - Fructose (d) D - glucose 25. Which of the following is not a sex hormone [MP PMT 2000] (a) Testosterone (b) Estrone (c) Estradiol (d) Cortisone 26. Acquired immune deficiency syndroms (AIDS) is characterised [AIIMS 2000] (a) Killer T-cells (b) Reduction in number of helper T-cells (c) An autoimmune disease (d) Inability of body to produce interferons 27. The base present in DNA, but not in RNA is [KCET (Engg.) 2001; NCERT 1978; Manipal MEE 1985; MP PMT 1994, MP PET 1995; DCE 2004] (a) Guanine (b) Adenine (c) Uracil (d) Thymine 28. Mutation of DNA occurs due to changes in the sequence of one of the following [MP PMT 2001] (a) Bases (b) Ribose units (c) Phosphate units (d) Sugar units 29. Which of the following is not true about vitamins [AFMC 2001] (a) They are vital for life (b) They help in digestion (c) They were named by “Funic” (d) Their deficiency causes diseases 30. Blood calcium level can be increased by the administration of [AFMC 2001] (a) Glucogon (b) Calcitonin (c) Thyroxine (d) Paratharmone
(b) Amount of adenine ( A ) is equal to that of thymine ( T ) and the amount of guanine ( G ) is equal to that of cytosine ( C ) (c) Amount of adenine ( A ) is equal to that of guanine ( G ) and the amount of thymine ( T ) is equal to that of cytosine ( C ) (d) Amount of adenine ( A ) is equal to that of cytosine ( C ) and the amount of thymine ( T ) is equal to guanine ( G )
6. DNA multiplication is called [Kerala (Med.) 2000] (a) Translation (b) Transduction (c) Transcription (d) Replication 7. Insulin is a protein which plays the role of [KCET 1986] (a) An antibody (b) A harmone (c) An enzyme (d) A transport agent 8. Proteins fulfil several functions in living systems. An example of a protein which acts as a hormone is [KCET 1985] (a) Casein (b) Oxytocin (c) Trypsin (d) Keratin 9. Pick out the unsaturated fatty acid from the following [KCET 2004; MHCET 2002] (a) Stearic acid (b) Lauric acid (c) Oleic acid (d) Palmitic acid 10. Vitamin B 12 contains metal [Bihar MEE 1997; RPET 1999; Pb. PMT 1999; AFMC 2002; CBSE PMT 2003; CPMT 2003; MP PMT 2003] (a) Ca (II) (b) Zn (II) (c) Fe (II) (d) Co (III) 11. The number of molecules of ATP produced in the lipid metabolism of a molecule of palmitic acid is [CBSE PMT 1998] (a) 130 (b) 36 (c) 56 (d) 86 12. Protein can be most easily removed from [UPSEAT 2000, 02] (a) Alkanes (b) Alkenes (c) Alkynes (d) Benzene 13. The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called [CBSE PMT 2004] (a) Zymase (b) Pepsin (c) Maltase (d) Lipase 14. The helical structure of protein is stabilized by [CBSE PMT 2004] (a) Ether bonds (b) Peptide bonds (c) Dipeptide bonds (d) Hydrogen bonds 15. The cell membranes are mainly composed of [CBSE PMT 2005]
(a) Carbohydrates (b) Proteins (c) Phospholipids (d) Fats
16. A compound of mol. wt. 180 is acetylated to give a compound of mol. wt. 390. The number of amino groups in the initial compound is [KCE (a) 2 (b) 4 (c) 5 (d) 6 17. Starting with three different amino acid molecules, how many different tripeptide molecules are formed [Kerala PMT 1999; KCET 1999] (a) 12 (b) 9 (c) 8 (d) 6 18. Which one of the following is a polysaccharide [NDA 1999] (a) Nylon (b) Amylose (c) Ribose (d) Polyethylene 19. Which of the following is not an acidic amino acid (a) Lysine (b) Arginine (c) Aspartic acid (d) Histidine 20. Proteins do not respond to (a) Biuret test (b) Heller's ring test (c) Ninhydrin test (d) Lucas test 21. Alkyl benzene sulphonates can be conductivity used as detergents in hard water, unlike soaps, as [AMU 2002] (a) They are highly soluble in water (b) Their Ca ^ / Mg salts are water soluble (c) They are non-ionic (d) Their Ca ^ / Mg salts are insoluble in water 22. When glucose reacts with bromine water, the main product is [Pb. CET 2003; BHU 2004] (a) Acetic acid (b) Saccharic acid (c) Glyceraldyhyde (d) Gluconic acid 23. A zwitter ion is [KCET 1989] (a) A positively charged ion without a metal atom in it (b) A negatively charged ion without metal atom in it (c) An ion with positive and negative charges at different points on it (d) A heavy ion with a small charge on it 24. Ribose is an example of [KCET 1998] (a) Ketohexose (b) Aldopentose (c) Disaccharide (d) Aldohexose 25. The two forms of D - glucopyranose obtained from the solution of D - glucose are called [IIT JEE Scree (a) Isomer (b) Anomer (c) Epimer (d) Enantiomer 26. Sucrose molecule is made up of [KCET 2005]
(a) A gluco pyranose and a fructo pyranose (b) A gluco pyranose and a fructo furanose (c) A gluco furanose and a fructo pyranose (d) A gluco furanose and a fructo furanose
Read the assertion and reason carefully to mark the correct option out of the options given below : (a) If both assertion and reason are true and the reason is the correct explanation of the assertion. (b) If both assertion and reason are true but reason is not the correct explanation of the assertion. (c) If assertion is true but reason is false. (d) If the assertion and reason both are false. (e) If assertion is false but reason is true.
1. Assertion : Glycine is amphoteric in nature. Reason : Glycine contains both acid and basic groups. [AIIMS 1996] 2. Assertion : Hydrolysis of sucrose is known as inversion of cane sugar. Reason : Sucrose is a disaccharide. [AIIMS 1997] 3. Assertion : Proteins on hydrolysis produce amino acids. Reason : Amino acids contain NH 2 and COOH groups. [AIIMS 1998] 4. Assertion : Sucrose undergo mutarotation. Reason : Sucrose is a disaccharide. [AIIMS 2000] 5. Assertion : DNA molecules and RNA molecules are found in the nucleus of a cell. Reason : On heating the enzyme do not lose their specific activity. [AIIMS 2002] 6. Assertion : All Amino acids exist as Zwitter ions. Reason : Amino acids have both NH 2 and COOH group. [AIIMS 2002] 7. Assertion : Activity of an enzyme is pH - dependent. Reason : Change in pH affects the solubility of the enzyme in water. [AIIMS 2003] 8. Assertion : Glycosides are hydrolyzed in acidic conditions. Reason : Glycosides are acetals. [AIIMS 2003] 9. Assertion : Haemoglobin is an oxygen carrier. Reason : Oxygen binds as O 2 to Fe of haemoglobin. [AIIMS 2003] 10. Assertion : Carboxypeptidase is an exopeptidase. Reason : It cleaves the N - terminal bond.
[AIIMS 2004]
11. Assertion : Sucrose is a non-reducing sugar. Reason : It has glycosidic linkage. [AIIMS 2004] 12. Assertion : Sucrose is a disaccharide. Reason : Sucrose is dextro rotatory. 13. Assertion : Fructose reduces Fehling’s solution and Tollen’s reagent. Reason : Fructose does not contain any aldehyde group. 14. Assertion : The specific rotation of a freshly prepared solution of glucose decreases from + 112° to 52.7° while that of glucose increase from + 19° to 52.7°. Reason : The change in specific rotation of an optically active compound with time to an equilibrium value is called mutarotation. 15. Assertion : amino acids exist as dipolar ions or zwitter ions. Reason : amino acids are the building blocks of proteins. 16. Assertion : Valine is an essential amino acid. Reason : The lack of essential amino acids in the diet causes Kwashiorkor. 17. Assertion : Sequence of bases in DNA is TGAACCCTT and sequence of bases in m - RNA is CATTAAACC. Reason : In DNA nitrogenous bases have hydrogen bonds. 18. Assertion : Millon’s test is a test to identify carbohydrates. Reason : Millon’s reagent is solution of mercurous nitrate and mercuric nitrate in nitric acid containing little nitrous acid. 19. Assertion : ATP molecules are energy rich molecules. Reason : ATP consists of a purine base adenine, pentose sugar ribose and a string of three phosphate groups. 20. Assertion : Solubilities of protein is minimum at the isoelectric point. Reason : At isoelectric point, protein molecule behaves as a zwitter ion. 21. Assertion : Amino acids are soluble in benzene and ether. Reason : Amino acids exist as zwitter ions. 22. Assertion : A solution of sucrose in water is dextrorotatory but on hydrolysis in presence of little hydrochloric acid, It becomes laevorotatory. Reason : Sucrose on hydrolysis gives unequal amounts of glucose and fructose as.
Proteins, Amino Acids and Enzymes
1 b 2 c 3 a 4 a 5 c 6 b 7 c 8 d 9 c 10 c 11 c 12 b 13 a 14 b 15 c 16 a 17 d 18 c 19 d 20 d 21 c 22 b 23 c 24 b 25 a 26 a 27 d 28 a 29 a 30 d 31 c 32 a 33 b 34 c 35 d 36 b 37 a 38 d 39 c 40 a 41 d 42 d 43 b 44 d 45 d 46 d 47 b 48 b 49 d 50 b 51 a 52 d 53 b 54 c 55 d 56 d 57 a 58 b 59 c 60 b 61 c 62 d 63 b 64 c 65 c 66 b 67 d 68 d 69 c 70 b 71 b 72 c 73 a 74 c 75 c 76 a 77 d 78 d 79 c 80 a 81 b 82 e 83 d 84 c 85 c 86 c 87 c 88 e 89 b 90 c 91 a 92 c 93 b 94 a 95 a 96 d 97 a 98 a 99 c
Fats and Lipids
1 c 2 a 3 d 4 c 5 c 6 c 7 a 8 c 9 b 10 c 11 d 12 c 13 d 14 c 15 bd 16 c 17 a 18 a 19 c 20 c 21 b 22 a 23 d 24 a 25 c 26 a 27 d
Vitamins, Hormone and Nucleic Acid
1 d 2 a 3 c 4 c 5 c 6 d 7 a 8 a 9 d 10 c 11 a 12 d 13 a 14 b 15 d 16 b 17 a 18 c 19 b 20 c 21 c 22 a 23 a 24 a 25 d 26 b 27 d 28 a 29 b 30 d 31 b 32 a 33 b 34 a 35 a 36 c 37 a 38 d 39 b 40 b 41 b 42 a 43 c 44 c 45 b 46 a
Critical Thinking Questions
1 b 2 c 3 c 4 c 5 b 6 d 7 b 8 b 9 c 10 d 11 a 12 d 13 d 14 d 15 b 16 a 17 d 18 b 19 c 20 d 21 d 22 d 23 c 24 b 25 b 26 b
Assertion and Reason
1 a 2 b 3 b 4 e 5 d 6 a 7 b 8 d 9 c 10 c 11 a 12 b 13 b 14 b 15 b 16 b 17 e 18 e 19 b 20 e 21 e 22 c 23 a
Carbohydrates
1. (d) [(] 36 %) 112 D Glucose o ⇌ [ (^) ( 0 ]D. 02 %) 52
Equilibriu m mixture o
[]( 64 %) 19
Glucose o D
D
Glucose has two forms and . When either of these two is dissolved in water and allowed to stand, it gets converted to an equilibrium mixture of and forms.
2. (b) Gun-cotton is a nitrocellulose or cellulose trinitrate which is used in explosive and as a binder for solid rocket propellant. 3. (d) Arabinose is an aldopentose HOCH (^) 2 ( CHOH ) 3 CHO 4. (d) In proteins amide group is present n O
H C R
NH C O
H C R
( NH C || )
peptideAmino bondor
| || |
5. (c) Inulin is a carbohydrate which is stored in “Roots of Dahliya”. 6. (c) Carbohydrates are hydrates of carbon. Their general formula is C (^) x ( H 2 O ) y. 8. (d) Glucose + Tollen’s reagent Gluconic acid + Ag- mirror. 9. (b) Protein gives blue-violet colour with ninhydrin
(2, 2-dihydroxyindane-1, 3-diene) Carbohydrates gives brown red ppt. with benedict’s solution (Alk. CuSO 4 Citrate ions)
11. (c) A ring structure - Methy lglucoside
|^2
| |
|^3 | 3
| |
|
( )
H C CH OH
H C OH CH
HO C H CHOH CHOH O
H C OH C
H C OH
HCl
HO
CHOH
CH
CHOH O
C
2
Methy l^2 glucoside
|
| 3
| ( )
39. (c) Glucose + Benedict's solution Red colour ( Cu 2 O )^. 40. (c) Sucrose conc. HNO ^3 Oxalic acid. 41. (b) Amylopectin is not soluble in water. 43. (c) (^12) Maltose 22 11
C H O
47. (b) Sucrose is not a reducing sugar. 56. (b)
Glucose^2 pheny lhy drazone
| 3
|
| 6 5
Warm 2
| 3
|
|
( ) ( )
2 6 5
CH OH
CHOH
CHOH
CH N NHCH
CHOH
CHOH
CHOH
CHO
NHNHC H
CHOH
CHOH
C O
CH N NHCH NHNHC H
2
| 3
|
|^65 ( )
2 65
Glucosazone
| 2
| 3
6 5
|^65 (^265) ( )
CH OH
CHOH
C N NHCH
CH N NHCH NHNHC H
C 6 (^) H 5 NH 2 NH 3
57. (d) Starch Diastase Maltose. 58. (c) (^12) Cane (^) sugar (^221126) Glucose (^12 66) Fructose 12 6
C H O HO CH O CH O
61. (b) Monosaccharide cannot be hydrolysed to simple forms. 64. (d) Starch + I 2 Blue colour. 66. (d) Glucose and sucrose are dextrorotatory Fructose is leavorotatory 68. (c) Food(C and shift H ) O 2 CO 2 H 2 O 70. (c) In neutral solvent, glucose shows mutarotation. 73. (b) Maltose HydrolysisMaltase glucose + glucose. 79. (b) 3 carbons e.g. Glyceraldehyde CHO OH
CH OH
CH (^) | | 2
83. (c) Starch Diastage Maltose Maltase glucose. 85. (a) All are optically active. 86. (c)
glucose
( )
2
|
|^3
|
D
CHOH
CH
CHOH
C
H OH
glucose
( )
2
|
|^3
|
D
CHOH
CH
CHOH
OH H C
90. (a) 5 atoms in the ring 93. (a) In sucrose the two monosaccharide units joined by -1, 2 glycoside bond. Since sucrose does not have hemiacetal carbon. Therefore it is non- reducing sugar. 94. (c) Starch Amylase Maltose. 96. (a) Glucose is the simplest carbohydrate i.e. mono saccharide rest are polysaccharide. 97. (a) We can’t digest cellulose which is a polysaccharide. 98. (d) Diastase enzyme converts starch into maltose. 99. (b) Lactose is present in milk (Glucose + Galactose). 100. (b) Carbohydrates are rich source of energy. 102. (a) Sucrose is a non reducing sugar it does not give any test with Benedict’s solution. 103. (a) That is called glycosidic linkage. 108. (c) Invert sugar is laevo rotatory. 111. (c) Starch is polymer of alpha glucose. 11 4. (a) Raffinose ( C 18 H 32 O 16 )is a trisaccharide (^18 32162) D (^6) glucose (^126) D (^6) fructose (^126) D (^6) mannose 12 6 C H O HO CH O CH O CH O 118. (b) Glucose + Fehling solution Gluconic acid + (Red^2 ppt)^
CuO
Glucose^2
CH OH
CH 3 O H
H OCH 3
O
o
O
OH H
CH 2 OH
CH 2 OH
H
H OH
H
D-
fructose
O O
