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 active site of an enzyme always contains one or more metal atoms.
(2) The water-soluble vitamins are the B vitamins and vitamins A and C.
(3) An enzyme's turnover number is the rate at which it is degraded and resynthesized within the human body.

Question

Quizplus · Accepted Answer

1) False - The active site of an enzyme does not always contain metal atoms; it often consists of amino acid residues that create a three-dimensional site for substrate binding. 2) False - Vitamins A is not water-soluble; it is fat-soluble. The water-soluble vitamins include the B vitamins and vitamin C. 3) False - An enzyme's turnover number is the number of substrate molecules an enzyme can convert into product per unit time, not the rate of its degradation and resynthesis.

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