Question

mini-quiz: ph and enzymes
based off of your observations of the enzyme shown, which of the following is true?
a. the denaturation of the enzyme does not affect the enzyme’s function.
b. the denaturation of this enzyme by ph changes is irreversible. in other words, restoring the ph to an optimal level does not fix the enzyme’s shape.
c. the denaturation of this enzyme by ph changes is reversible. in other words, restoring the ph to an optimal level does fix the enzyme’s shape.
d. the denaturation of the enzyme is necessary in order for the enzyme to work properly.
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Explanation:

To solve this, we analyze each option:

• Option A: Enzyme denaturation (like by pH change) affects its 3D structure, including the active site, so it does affect function. Eliminate A.
• Option B: Enzyme denaturation due to pH changes (extreme pH) is irreversible. The protein's (enzyme) structure is permanently altered, and restoring pH won't fix the shape. This is correct.
• Option C: As explained, pH - induced denaturation is irreversible for most enzymes; restoring pH doesn't fix the shape. Eliminate C.
• Option D: Denaturation is harmful to enzymes as it disrupts their active site, so it's not necessary for proper function. Eliminate D.

Answer:

B. The denaturation of this enzyme by pH changes is irreversible. In other words, restoring the pH to an optimal level DOES NOT fix the enzyme's shape.