Factors That Affect Photosynthesis

Question 1

Why is chlorophyll required for photosynthesis?

Answer 1

it absorbs the light energy

Question 2

How can farmers can maximise the rate of photosynthesis?

Answer 2

• light intensity
• carbon dioxide concentration.
• temperature.

Question 3

the amount of chloroplasts in a leaf can vary. what factors damage the chloroplasts?

Answer 3

• disease (tobacco mosaic virus)
• environmental stress
• lack of nutrients (water)

Question 4

environmental factors that affect the rate of photosynthesis

Answer 4

• Light intensity
• Amount of carbon dioxide
• Temperature

Question 5

When a graph levels off (is in a straight line) we say that it has:

Answer 5

plateaued

Question 6

Describe and explain how the rate of photosynthesis varies with temperature.
(denaturing process) (5)

Answer 6

• Rate initially increases with temperature…
• …because particles have more energy and move faster, so react more frequently
• Highest rate is at optimum temperature for enzyme
• At higher temperatures the rate decreases as bonds holding the enzyme together begin to break, and so the enzyme changes shape
• Rate falls to zero as enzymes denature