KIPS S.R Biology Unit 2: Biological Molecules & Enzymes
10 multiple-choice questions (rising difficulty) based on Prep Titans KIPS S.R Unit#2 Biological Molecules & Enzymes material.
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Quiz Questions & Answers
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Question 1: Which group of biological molecules commonly serves as long-term energy storage and is hydrophobic?
Proteins
Lipids
Nucleic acids
Carbohydrates
Question 2: What is the basic monomer unit of proteins?
Fatty acid
Nucleotide
Amino acid
Monosaccharide
Question 3: Which bond joins monosaccharides in a carbohydrate polymer?
Peptide bond
Phosphodiester bond
Glycosidic bond
Ester bond
Question 4: Which macromolecule stores genetic information in cells?
Lipids
Nucleic acids
Polysaccharides
Carbohydrates
Question 5: Which property of enzymes most directly explains why only specific substrates bind to an enzyme?
Solubility in water
Denaturation point
Primary sequence length
Active site specificity
Question 6: Which factor commonly increases the rate of an enzyme-catalyzed reaction up to a point, before causing denaturation if excessive?
Substrate inhibition
Cofactor absence
Temperature
pH neutrality
Question 7: Which type of enzyme inhibitor binds irreversibly to the active site and permanently inactivates the enzyme?
Irreversible inhibitor
Allosteric activator
Competitive inhibitor
Noncompetitive inhibitor
Question 8: Which carbohydrate is a structural polysaccharide found in plant cell walls?
Cellulose
Glycogen
Fructose
Starch
Question 9: Which statement best describes the role of cofactors in enzyme activity?
Cofactors assist enzyme function by enabling proper active site conformation or participating in catalysis.
Cofactors are polysaccharides that store energy for enzymes.
Cofactors are only required at extremely high temperatures.
Cofactors permanently inhibit enzymes by blocking substrates.
Question 10: Which change to an enzyme would most likely lower its Vmax but not alter substrate binding affinity (Km) in classic Michaelis–Menten terms?
Competitive inhibition
Noncompetitive inhibition
Increasing substrate concentration
Allosteric activation