Use the following to answer the questions below:
In each of the following multiple-choice questions, characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices:
-Statements: (1) The B vitamins serve as precursors for enzyme cofactors.
(2) Associated with allosteric enzyme action are substances known as regulators.
(3) Kinases belong to the class of enzymes called isomerases.

Question

Quizplus · Accepted Answer

(1) True: B vitamins are essential for the formation of enzyme coenzymes.
(2) True: Regulatory molecules affect the activity of allosteric enzymes.
(3) False: Kinases are enzymes that transfer a phosphate group from ATP to another molecule, not isomerases. Therefore, only statements (1) and (2) are true, and the best choice is B.

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