Enzymes and Metabolic Pathways Quiz
Preview:
What type of regulation occurs when inhibitor molecule is similar enough to a substrate bind to the active site and simply block the substrate from binding?
A. Noncompetitive inhibition
B. Competitive inhibition
C. Feedback inhibition
D. Allosteric regulation
What is the effect of low pH and high temperatures on enzyme activity?
A. Denature the enzyme
B. Decrease enzyme efficiency
C. Increase enzyme efficiency
D. No effect on enzyme efficiency
What is the optimal pH for pepsin, an enzyme in the stomach?
A. Neutral pH levels
B. Basic pH levels
C. High pH levels
D. Acidic pH levels
How do enzymes function as molecular catalysts?
A. By preventing substrate binding
B. By increasing activation energy barriers
C. By changing the shape of the substrate
D. By decreasing activation energy barriers
What is the role of enzymes in metabolic pathways?
A. To change the type of chemical reactions
B. To stop chemical reactions
C. To speed up chemical reactions
D. To slow down chemical reactions
What can act competitively by binding to the enzyme’s active site?
A. Activators
B. Cofactors
C. Coenzymes
D. Inhibitors
Which environmental factor can alter the shape of the active site and lead to enzyme denaturation?
A. High temperature
B. Low temperature
C. High pH
D. Low pH
Under what conditions does trypsin, an enzyme in the human small intestine, work most efficiently?
A. Low pH
B. High pH
C. Neutral pH
D. High temperature
What can alter the shape of the active site of an enzyme?
A. Coenzymes and cofactors
B. Feedback inhibition
C. Temperature and pH
D. Presence of substrate
Which part of the enzyme interacts (binds) with the substrate is called which of the following?
A. Allosteric site
B. Cofactor
C. Active site
D. Coenzyme