Photosynthesis Rate Factors Quiz

What happens to the rate of photosynthesis when light intensity is increased beyond a certain point?

• It fluctuates randomly.

• It remains constant.

• It decreases.

• It continues to increase indefinitely.

Which factor is NOT a limiting factor for photosynthesis when light intensity is high?

• Water availability

• Oxygen levels

• Temperature

• Carbon dioxide levels

Why does the rate of photosynthesis plateau when CO2 levels are increased?

• The plant stops absorbing CO2.

• Other factors become limiting.

• The plant has enough light and water.

• The plant runs out of water.

How does temperature initially affect the rate of photosynthesis?

• It increases the rate.

• It has no effect.

• It decreases the rate.

• It causes the rate to fluctuate.

What happens to enzymes at high temperatures during photosynthesis?

• They denature and stop working.

• They work more efficiently.

• They become more flexible.

• They increase in number.