Photosynthesis

Question 1

How many stages does photosynthesis have

Answer 1

Photosynthesis has 2 stages. It’s a 2-stage process

Question 2

What happens in light reaction

Answer 2

The light energy from the sun is trapped by chlorophyll in the chloroplasts and converted into chemical energy which is used to generate ATP

Question 3

What are needed for the second stage of photosynthesis

Answer 3

Hydrogen and ATP

Question 4

What does Carbon fixation use

Answer 4

It uses hydrogen and ATP and carbon dioxide to produce sugar

Question 5

What are the uses of sugar made in photosynthesis

Answer 5

The chemical energy in the sugar can be used for respiration (to produce ATP/energy) and to convert into other substances e.g. starch and cellulose (which is used to make plant cell walls)

Question 6

What is a limiting factor

Answer 6

A limiting factor is any factor which, when in short supply, can reduce the rate of photosynthesis.

Question 7

What are the limiting factors

Answer 7

Carbon dioxide concentration, light intensity and temperature