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Enzymes (Pre-test)

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For each of the following questions select the best answer.

1. Enzymes:
a. Always speed up the reaction rate
b. Are Catalysts
c. Are always a protein
d. Both a. and b.
e. All of the above
2. Which of the following correctly describes a model of enzyme action
a. Induced fit model - Binding of substrates change conformations of substrates and enzyme
b. Lock and Key model - Binding of substrates changes conformations of substrates and enzyme
c. Lock and Key model - Enzyme active site is flexible, and substrates fit precisely in it
d. Induced fit model - Enzyme active site is rigid, and substrates change conformations to fit precisely in it
e. None of the above
3. Coenzymes are:
a. A class of enzymes
b. Usually proteins
c. Small molecules, bound to enzymes to play critical roles
d. Never altered during enzyme reactions
e. All of the above
4. Allosteric regulators of enzymes:
a. Bind outside the catalytic site
b. Bind within the catalytic site
c. Alters overall shape and interaction of enzymes
d. Both a. and c.
e. Both b. and c.