Question

in a simulation, students observe enzyme activity at different ph levels. enzyme z works best at ph 9 but fails at ph 5. what does this suggest about enzyme z?
its a digestive enzyme in the stomach
its active in acidic environments
its adapted to alkaline conditions
its denatured by high temperatures

Explanation:

Enzymes have optimal pH ranges for activity. pH 9 is alkaline (basic), and since Enzyme Z works best at pH 9, it suggests adaptation to alkaline conditions. Stomach enzymes (like pepsin) work in acidic (low pH, e.g., pH 1 - 3) environments. Enzyme Z fails at pH 5 (which is acidic), so it's not active in acidic environments. The question is about pH, not temperature, so the denaturation by high - temperature option is irrelevant.

Answer:

It's adapted to alkaline conditions.