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A collection of multiple-choice questions covering various topics in biology and chemistry. It provides a valuable resource for students preparing for exams or quizzes in these subjects. The questions are designed to test understanding of fundamental concepts, principles, and applications in both fields.
Typology: Exams
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Match the entries in Column I w ith their functions described in Column II.
Which one of the following combinations is correct?
(a)
P - (iv); Q - (iii); R - (ii); S - (i)
(b)
P - (iii); Q - (i); R - (iv); S - (ii)
(c)
P - (ii); Q - (iv); R - (i); S - (iii)
(d)
P - (i); Q - (ii); R - (iii); S - (iv)
Which one of the following best describes peptones?
(a)
Partially digested proteins
(b)
Zymogen form of pepsin
(c)
Activated form of pepsin
(d)
An intestinal mixture of proteins, mucous and HCO − 3
A mitotic drug inhibits microtubule formation. Which one of the following stages of karyokinesis w ill be the rst to get a ected by the drug?
(a)
Metaphase
(b)
Anaphase
(c)
Prophase
(d)
Telophase
Which one of the following statements regarding seed structure is INCORRECT?
(a)
In monocot seeds, the membraneous seed coat that is fused w ith the fruit wall is called the aleurone layer.
(b)
The endosperm is not present in some of the mature dicot seeds.
(c)
In dicots, the outer layer of the seed coat is called testa.
(d)
Coleoptile and coleorhiza are found in monocotyledonous seeds.
Which one of the following statements is CORRECT about biological nitrogen x ation in plants?
(a)
The catalytic redox center of Nitrogenase contains Mo and Fe as cofactors.
(b)
Atmospheric nitrogen is x ed by Nitrogenase by converting N 2 to NO− 3.
(c)
Nitrogenase can function optimally only in the presence of molecular oxygen.
(d)
The transport of important amides, like asparagine and glutamine, produced by transamination, to di erent parts of the plant body is mediated by phloem.
Which one of the following is an example of genetic diversity?
(a)
Variation in the potency and concentration of reserpine produced by Rauwolfia vomitoria.
(b)
Higher diversity of amphibians in the Western Ghats than in the Eastern Ghats.
(c)
Greater v ariation of ecosystems found in India than in Scandinavia.
(d)
The greater diversity of plant species found in India compared to Central Asia.
Match the terms in column I w ith their corresponding physiological roles given in Column II.
Which one of the following combinations is correct?
(a)
P - (iv); Q - (v); R - (i); S - (ii)
(b)
P - (v); Q - (i); R - (iv); S - (iii)
(c)
P - (iii); Q - (ii); R - (v); S - (iv)
(d)
P - (i); Q - (iv); R - (iii); S - (v)
For w hich one of the following diseases does the causative agent require the splicing of their hnRNA to generate mature mRNA?
(a) Malaria
(b) Pertussis
(c)
Typhoid
(d) Tuberculosis
In an island with 10,000 individuals, four have sickle cell anemia, a recessive autosomal disease. Assuming that the locus is in Hardy-Weinberg equilibrium, how many individuals in that island are expected to be heterozygous for the disease allele?
(a)
(b)
(c)
(d)^9608
A 1000 base-pair DNA fragment w as cloned between Hind III and EcoR I sites of the plasmid vector (pIAT) of size 3500 base-pair. The cloned fragment had a Not I site as shown in the figure. In order to confirm the presence of the insert, the recombinant plasmid was digested completely with ( a ) Not I and EcoR I, and ( b ) Not I and Hind III.
In lane 1 the products of the digestion by Not I and EcoR I was loaded. In lane 2 the products of the digestion by Not I and Hind III was loaded. Which one of the following correctly represents the agarose gel electrophoresis profile of the digested recombinant plasmid for ( a ) and ( b ), respectively?
(a)
(d)
The following pedigree chart shows the inheritance of a genetic disorder. I-2 and III-2 are the only a ected individuals.
Which one of the following is the correct pattern of inheritance of the disorder, and the genotype of the II-3 individual?
(a)
Autosomal recessive, heterozygous
(b)
Autosomal dominant, homozygous for the normal allele
(c)
X-linked recessive, heterozygous
(d)
Autosomal recessive, homozygous for the normal allele
Amongst O 2 , N 2 , F 2 , and B 2 , which molecules will be attracted to an external magnetic field?
(a)
O 2 and B 2
(b)
F 2 , N 2 , and B 2
(c)
O 2 , B 2 , and N 2
(d)
O 2 and F 2
What is the smallest P−P−P bond angle in the highly reactive allotrope of phosphorus?
(a)
(b)
(c)^45
◦
(d)
