Questions: An organic molecule such as a vitamin that makes an enzyme functional is called a/an Select one: a. coactivator. b. catalyst. c. coenzyme. d. buffer.

An organic molecule such as a vitamin that makes an enzyme functional is called a/an

Select one:
a. coactivator.
b. catalyst.
c. coenzyme.
d. buffer.

Transcript text: An organic molecule such as a vitamin that makes an enzyme functional is called a/an Select one: a. coactivator. b. catalyst. c. coenzyme. d. buffer.

Solution

The answer is the third one (C): coenzyme.

Explanation for each option:

a. Coactivator: This is incorrect. A coactivator is a protein that increases gene expression by binding to an activator or transcription factor, but it is not involved in making an enzyme functional.

b. Catalyst: This is incorrect. A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process. While enzymes are biological catalysts, the term "catalyst" does not specifically refer to the organic molecules that assist enzymes.

c. Coenzyme: This is correct. A coenzyme is an organic molecule that binds to an enzyme and is necessary for its activity. Coenzymes often act as carriers for chemical groups or electrons during the enzymatic reaction.

d. Buffer: This is incorrect. A buffer is a solution that resists changes in pH when acids or bases are added. It is not related to enzyme functionality.

In summary, the correct term for an organic molecule that makes an enzyme functional is a coenzyme.

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