Question

quiz!
high temperatures, and ph changes can cause an enzyme to denature. what does this mean?
a. it means that the enzyme begins to work more effectively and efficiently.
b. it means the enzyme loses its shape and does not function.
c. it means that the enzyme will fit new substrates and catalyze new reactions.
d. it means that the enzyme will be completely destroyed.

Explanation:

To solve this, we analyze each option:

• Option A: Enzyme denaturation (due to high temp/pH) does not increase efficiency; it impairs function. Eliminate A.
• Option B: Denaturation involves the enzyme losing its specific 3D (tertiary/quaternary) structure, including the active site. Without a proper active site, it can't bind substrate or function. This matches denaturation.
• Option C: Denaturation doesn't let enzymes fit new substrates; the active site is disrupted, not repurposed. Eliminate C.
• Option D: Denaturation is loss of structure/function, not complete destruction (the protein/enzyme isn't broken down entirely, just loses its functional shape). Eliminate D.

Answer:

B. It means the enzyme loses its shape and does not function.