Rate of photosynthesis and limiting factors

Question 1

What 3 limiting factors of photosynthesis?

Answer 1

Light intensity, CO2 concentration and temperature.

Question 2

How does light intensity affect the rate of photosynthesis?

Answer 2

Increasing the light intensity will increase the speed of photosynthesis.

Question 3

How does carbon dioxide concentration affect the rate of photosynthesis?

Answer 3

Photosynthesis can be limited by the concentration of CO2 in the air, even with enough light a plant cannot photosynthesis if there is insufficient CO2.

Question 4

How does temperature affect the rate of photosynthesis?

Answer 4

If too cold or too hot, rate of photosynthesis decreases

Question 5

How can you enhance the conditions in greenhouses to gain the maximise rate of photosynthesis?

Answer 5

Use artificial lights so photosynthesis can continue beyond daylight hours, or a higher than normal light intensity.
Use of paraffin lamps (when burning) produces heat and CO2, so increases photosynthesis.