Question

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?

Adding more maltose molecules

Increasing the volume of the cell

Adding more of the enzyme

Increasing the pH within the cell

Answer 1

.what do u think

Answer 2

im actually not quite sure, i cant remember this one at all, i think it could be adding more moltose molecules ...?

Answer 3

if we add more enzyme or substrate ,reaction rate will increase so to decrease rate of reaction the conditions must change

Answer 4

increasing the volume of the cell ? that would make more space.

Answer 5

no changing ph

Answer 6

Both "Increasing the volume of the cell" and "Increasing the pH within the cell" will slow down the reaction for different reasons. Increasing the volume will decrease the probabilities of the molecules meeting each other and, therefore, have less successful collisions. Fewer collisions -> fewer reactions.

Increasing the pH will deprotonate all acidic sites on enzymes (changing their conformation) and substrates (changing the chemistry of the reactions) causing the rate of reaction to slow down and eventually stop. Its important to note that glycosidic bonds (acetals) are not cleaved by base, and the substrate will not degrade spontaneously (like, it would otherwise would if the pH was lowered).