DP 15 Quiz

How does temperature generally affect enzyme activity?

• Enzyme activity increases indefinitely with temperature.

• Enzyme activity decreases as temperature increases.

• Enzyme activity increases with temperature up to a certain point, then decreases.

• Temperature has no effect on enzyme activity.

What is the optimal pH range for most enzymes in the human body?

• 1-3

• 4-6

• 7-8

• 9-11

What happens to enzyme activity when the pH is far from the enzyme's optimal pH?

• Enzyme activity increases.

• Enzyme activity decreases.

• Enzyme activity remains unchanged.

• Enzyme activity becomes unpredictable.

How does increasing enzyme concentration affect the rate of reaction, assuming substrate concentration is not a limiting factor?

• The rate of reaction decreases.

• The rate of reaction remains constant.

• The rate of reaction increases.

• The rate of reaction becomes unpredictable.

What is competitive inhibition in enzymes?

• An inhibitor binds to the enzyme at a site other than the active site.

• An inhibitor competes with the substrate for the active site.

• An inhibitor permanently deactivates the enzyme.

• An inhibitor enhances enzyme activity.

Which of the following is true about non-competitive inhibition?

• It can be overcome by increasing substrate concentration.

• The inhibitor binds to the active site.

• The inhibitor binds to a different site, changing the enzyme's shape.

• It enhances enzyme activity.

Which process is directly affected by enzyme activity in photosynthesis?

• Light absorption

• Carbon fixation

• Oxygen release

• Water uptake

What is the role of enzymes in the link between photosynthesis and cellular respiration?

• Enzymes store energy.

• Enzymes convert light energy to chemical energy.

• Enzymes facilitate the conversion of products of photosynthesis into substrates for respiration.

• Enzymes inhibit the processes.