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CHEM 210 Module 5 Exam Newest Questions and Answers 2025 (Verified Answers)
Typology: Exams
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3 / 3 pts Glycerol contains how many alcohol functional groups? 1 2 3 4 None of the above 3 Which of the following are derived from or made from fatty acids? Cholesterol Carotenoids Phosphoglyceride s Both A and B Both A and C PHOSPHOGLYCERIDES
3 / 3 pts Triacylglycerols are made from: A glycerol backbone Three fatty acids
3 / 3 pts Amide linkages between fatty acids A glycerol backbone and three fatty acids All of the above A GLYCEROL BACKBONE AND THREE FATTY ACIDS
Fat
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0 / 3 pts Lipid Membrane Sphingolipi d OIL Identify the lipid class given by the structural formula: Phosphoglycerid e Sphingolipid Cholesterol Triacylglycerol None of these PHOSPHOGLYCERIDE are a class of membrane proteins that are firmly associated with the membrane bilayer. Peripheral protein Integral
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3 / 3 pts Inner transmembrane protein INTEGRAL PROTEIN Isoprene units are used to make. A. Cholesterol B. Carotenoid molecules C. Vitamin K D. Both A and C E. All of the above E. ALL OF THE ABOVE Which notation is for a fatty acid with two double bonds? A) 18:1( Δ Δ9,13) B) 18:2(Δ9,13) C) 14:1(Δ9,13)
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B Which notation indicates a 20-carbon omega-3 fatty acid that contains no other double bonds? A) 20:1 (Δ 11 ) B) 20:1Δ 18 ) C) 20:1(Δ 17 ) D) 20:1(Δ 3 ) E) 20:3(Δ3omega) C
3 / 3 pts Ceramide Glucose Sphingolipid Glycerol Phosphoglycer ol GLYCEROL Which types of membrane lipids determine the blood type of humans? Triacylglycerols Phosphoglyceride s Cholesterol Fatty acids Sphingolipid s SPHINGOLIPIDS Sphingolipids are found in high concentrations in the membranes of. organelles myelin sheaths all cells heart cells Vitamin K lipids MYELIN SHEATHS In a sphingolipid, the fatty acids are attached at carbon-2 by this type of linkage?
Amide linkage An ether linkage An alcohol linkage A peptide linkage Alkyl linkage
Are lipids that can be either on the top of the cell or bottom of the cell Are associated with the inside or outside surface of the membrane None of the above
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3 / 3 pts ARE ASSOCIATED WITH THE INSIDE OR OUTSIDE SURFACE OF THE MEMBRANE Which statement best describes a general feature of membranes? Individual lipid molecules are free to move in the membrane The interior of the lipid bilayer is very polar The membrane breaks easily The polar heads face inward The membrane is rigid INDIVIDUAL LIPID MOLECULES ARE FREE TO MOVE IN THE MEMBRANE The following cartoon drawing represents which lipid type? Fatty Acid Triacylglycerol Phosphoglycerid e Cholesterol None of these PHOSPHOGLYCERIDE
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3 / 3 pts Vitamin A Vitamin B Vitamin C Vitamin D Vitamin K VITAMIN K is not found in membrane bilayers. Cholesterol Sphingolipid Triacylglycerol Phosphoglyceride s All of these TRIACYLGLYCEROL What molecule that protects against UV rays is found both in bacteria and in the eyes? Sphingolipids
3 / 3 pts Carotenoid Triacylglycerol Cholesterol Water CAROTENOID What molecule has four fused rings in its structure?
Is water soluble A MOLECULE THAT DISSOLVES IN A NON-POLAR SOLVENT
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5 / 5 pts (Short answer) A particular fatty acid molecule has two bends, or kinks, in its structure. What is the cause of the bending or kinking? Double bonds cause the fatty acids to bend or kink about in solution. These double bonds reduce the packing structure of fatty acids making them more liquid-like.
(short answer) Where in the cell are membranes found? They make up the cell. The cell, itself, and the organelles have membranes.
5 / 5 pts (short answer) What type of lipid contains a ceramide? What is the purpose of this lipid? Sphingolipids. Sphingolipids are structural lipids that form membrane bilayers with specific functions. Sphingomyelins are a subtype of sphingolipids that occur in all membrane bilayers but are especially prominent in the myelin sheath of some neurons. This subclass of sphingolipids typically has a polar head group with a neutral charge. Another vital function of sphingolipids is that they define the blood type of individuals. (short answer) What is the most significant chemical difference between triacylglycerols and phosphoglycerides that lead to their different functions? Triacylglycerols are nonpolar molecules that can be stored as energy.
