Enzyme Activity Quiz

What is the effect of increasing temperature on enzyme activity, up to a certain point?

• It decreases enzyme activity.

• It has no effect on enzyme activity.

• It increases enzyme activity.

• It denatures the enzyme immediately.

What happens to an enzyme when the temperature is too high?

• It speeds up the reaction rate indefinitely.

• It becomes more stable.

• It denatures and loses its function.

• It remains unaffected.

At what point does an enzyme exhibit the highest activity?

• At its optimum temperature and pH.

• At a very low temperature and acidic pH.

• At a high temperature and basic pH.

• At freezing temperatures.

How does a significant change in pH affect enzyme activity?

• It increases enzyme activity.

• It does not change the activity.

• It may denature the enzyme, reducing its activity.

• It always improves the enzyme's stability.

Which statement is true about the relationship between pH and enzyme activity?

• All enzymes work best at pH 7.

• Each enzyme has a specific pH at which it works best.

• Enzymes are not affected by changes in pH.

• Lowering the pH always increases enzyme activity.

Enzymes are _______ that act as biological catalysts.

High temperatures can _______ an enzyme, leading to a loss of function.

Each enzyme has an optimal _______ and _______ at which it functions best.

Changing the pH can alter the shape of an enzyme's _______ site.