Question

the graph shows the relative enzymatic activity among four different enzymes.
which enzyme would be most efficient in an environment where the ph level can fluctuate between acidic and basic?

Explanation:

Step1: Analyze pH range for acidic - basic

Acidic pH is below 7, basic is above 7. The pH range between acidic and basic is around pH 4 - 8.

Step2: Check enzyme activity in that range

Look at the graph. Enzyme B has activity in the pH range (around 4 - 8) where pH can fluctuate between acidic and basic.

Answer:

B