Limiting Factors for Photosynthesis

Question 1

What factors can limit the rate of photosynthesis?

Answer 1

Temperature
Carbon Dioxide Concentration
Light Intensity

Question 2

How does temperature limit the rate of photosynthesis?

Answer 2

As the temperature rises, so does the rate of photosynthesis.

Question 3

What happens when the temperature approaches 45 degrees Celsius?

Answer 3

The enzymes controlling photosynthesis start to be destroyed and the rate of photosynthesis drops to zero.

Question 4

How does Carbon Dioxide Concentration limit the rate of photosynthesis?

Answer 4

As the carbon dioxide concentration rises, so does the rate of photosynthesis. So, carbon dioxide is limiting the rate of photosynthesis.

Question 5

What does a rise in carbon dioxide levels mean?

Answer 5

It has no effect. Carbon Dioxide is no longer the limiting factor. It must be either light or temperature.

Question 6

How does Light Intensity limit the rate of photosynthesis?

Answer 6

As the light intensity increases, so does the rate of photosynthesis.

Question 7

What does a rise in light intensity mean?

Answer 7

It has no effect. Light intensity must be either carbon dioxide or temperature.