Question

question 6 (3 points)
(01.02 mc)
the maltose molecule can be broken down into two individual glucose molecules with the help of an enzyme produced within a cell. which of the following changes is most likely to slow down this reaction?
o a adding more maltose molecules
o b increasing the volume of the cell
o c adding more of the enzyme
o d increasing the ph within the cell

Explanation:

Enzymes have an optimal pH range for activity. Increasing the pH within the cell (beyond the enzyme's optimal range) can denature the enzyme (alter its shape). Since enzymes work by binding to substrates (like maltose here) in a specific shape - substrate interaction (lock - and - key or induced fit model), a denatured enzyme cannot bind effectively to maltose.
Adding more maltose (a) would provide more substrate for the enzyme to act on (assuming the enzyme is not saturated), likely increasing the reaction rate. Increasing the cell volume (b) has no direct impact on the enzyme - substrate interaction. Adding more enzyme (c) would increase the number of active sites available for maltose binding, increasing the reaction rate.

Answer:

d. Increasing the pH within the cell