Question

question
what happens to the enzyme lipase in the stomach when the ph is lower than 4.0?
select the correct answer below:
the enzyme may change shape, causing a loss of catalytic activity.
there will be no change in the enzyme.
the enzyme may change shape, but the catalytic activity will remain unchanged.
the enzyme may change shape, causing an increase in catalytic activity.

Explanation:

Enzymes like lipase have an optimal pH range for activity. Lipase typically functions better in less acidic environments. When pH is lower than 4.0 (more acidic), the enzyme's structure (shape) can be disrupted (denatured). Since the enzyme's function (catalytic activity) is highly dependent on its shape (as the active site shape is crucial for binding substrates), a change in shape due to extreme pH (here, low pH) leads to loss of catalytic activity.

Answer:

The enzyme may change shape, causing a loss of catalytic activity.