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 enzymes 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 enzymes 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 enzymes 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: Denaturation changes an enzyme's structure (like active site), which affects function. So A is false.
• Option B: Enzyme denaturation due to pH changes (extreme pH) is irreversible. Restoring pH doesn't fix the shape (since the protein's secondary/tertiary structure is permanently altered). This matches enzyme properties.
• Option C: pH - induced denaturation is irreversible; the enzyme's shape isn't restored by pH adjustment. So C is false.
• Option D: Denaturation is harmful to enzyme function (it loses activity), so it's not necessary for proper work. D is false.

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.