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Enzymes

Question 44
Multiple Choice

Enzymes A) are catalysts in chemical reactions. B) can be carbohydrate molecules. C) are broken down during chemical reactions they catalyze. D) have names generally ending in the suffix "-ose." E) are polymers of ATP that store large amounts of energy.

Related questions
Q 45
Which is NOT true about cofactors involved in enzymatic reactions? A) They may alter the conformation of the enzyme. B) They may be a metal such as iron. C) They may be a substrate in a catalyzed reaction. D) There must be equal quantities of enzyme and cofactor molecules for a reaction to proceed. E) Only a small number of cofactor molecules may be needed to maintain enzyme activity.
Q 46
What is a coenzyme? A) an organic cofactor that directly participates as one of the substrates in an enzymatic reaction B) a metal, such as zinc, that participates in enzymatic reactions C) a term regarding enzymatic reactions that is synonymous with "cofactor" D) any ligand that binds to a specific site on a protein receptor E) an inorganic molecule that catalyzes enzymatic reactions
Q 47
Which of the following is true concerning the rate-limiting step in a metabolic pathway? A) It is likely to be the slowest reaction in the pathway, and it is always the last step in a metabolic pathway. B) It is likely to be the fastest reaction in the pathway, and it is always the last step in a metabolic pathway. C) It is always the first step in the pathway, and may be subject to end-product inhibition. D) It is likely to be the slowest reaction in the pathway and it may be subject to end-product inhibition. E) It is likely to be the fastest reaction in the pathway and it may be subject to end-product inhibition.
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