Zinc, an Essential Trace Element for Most Organisms, Is Present

question 58

Multiple Choice

Zinc, an essential trace element for most organisms, is present in the active site of the enzyme carboxypeptidase. The zinc most likely functions as ________.

• A) a noncompetitive inhibitor of the enzyme
• B) an allosteric activator of the enzyme
• C) a cofactor necessary for enzyme activity
• D) a coenzyme derived from a vitamin

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Definitions:

Mineral Oil

A colorless, odorless, light oil derived from petroleum, used as a lubricant, laxative, or in various cosmetics and pharmaceuticals.

Ear Canal

The narrow passage leading from the outer ear to the eardrum, through which sound waves are directed.

Soft Contact Lens

A type of contact lens that is made from soft, flexible plastics that allow oxygen to pass through to the cornea of the eye.

Cleansing Solution

A chemical mixture used to clean or disinfect surfaces and objects.