Each amino acid differs from another in the
A) number of central carbon atoms.
B) size of the amino group.
C) number of carboxyl groups.
D) nature of the side chain.
E) number of peptide bonds in the molecule.
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Question 2) You would expect a peptide bond to link
A) two simple sugars.
B) two amino acids.
C) two nucleotides.
D) a sugar and a peptide.
E) a peptide and a fatty acid.
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Question 3) The term ________ refers to certain amino acids, which can have both a positive charge and a negative charge.
A) anion
B) cation
C) twinion
D) zwitterion
E) double ion
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Question 4) Substrate molecules bind to enzymes at the ________ sites.
A) amino
B) active
C) carboxyl
D) reactant
E) neutral
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Question 5) The monomers of protein are
A) glucose.
B) fatty acids.
C) amino acids.
D) nucleotides.
E) nitrogen base.
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Question 6) Which of the following are functions of proteins?
A) support
B) defense
C) metabolic regulation
D) buffering
E) All of these are functions of proteins.
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Question 7) Which of the following is not a function of steroids?
A) They are a significant energy reserve for the body.
B) They are structural components of the plasm membrane.
C) They are involved in regulation of sexual function.
D) They regulate tissue metabolism and mineral balance.
E) They are required for normal processing of dietary fats.
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Question 8) Which of the following is not a function of triglycerides?
A) They are a reserve and important source of energy.
B) They help insulate against heat loss in cold climates.
C) They help protect organs by creating a cushion around the organ.
D) They act as a reserve for lipid soluble vitamins.
E) They act as a structural component of plasma membranes.
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Question 9) In water, phospholipids tend to form tiny droplets with hydrophobic tails buried inside called
A) micelles.
B) chylomicrons.
C) glycocalyces.
D) eicosanoids.
E) hydroceles.
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Question 10) Molecules with two fatty acid chains and a phosphate group that form biological membranes are called
A) diglycerides.
B) disaccharides.
C) dipeptides.
D) prostaglandins.
E) phospholipids.
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