Question

enzymes are essential proteins that act as biological catalysts in cells. how do they speed up specific biochemical reactions without being consumed, which allows them to perform its function in a cellular process?
a. an enzymes specific three - dimensional shape creates an active site that fits only certain substrate molecules, allowing it to catalyze a specific reaction.
b. enzymes are primarily composed of long chains of simple sugars, which provides the energy needed to drive cellular reactions.
c. the enzymes structure allows it to store excess genetic information, which is then released to fuel metabolic pathways.
d. enzymes form a rigid, protective layer around organelles, preventing cellular reactions from occurring too quickly.

Explanation:

Enzymes are biological catalysts with specific three - dimensional shapes. Their active sites fit only certain substrate molecules, allowing them to catalyze specific reactions in cellular processes. Option B is wrong as enzymes are proteins (chains of amino - acids, not simple sugars). Option C is incorrect as enzymes don't store genetic information. Option D is wrong as enzymes don't form a protective layer around organelles.

Answer:

A. An enzyme's specific three - dimensional shape creates an active site that fits only certain substrate molecules, allowing it to catalyze a specific reaction.