Photosynthesis: Light Independent reactions

Question 1

Where do light independent reactions occur

Answer 1

Occurs in the stroma of the chloroplasts

Question 2

What are the 3 stages of Calvin cycle

Answer 2

1. Carbon fixation
2. Reduction reactions
3. RuBp regeneration

Question 3

What happens in the carbon fixation stage (steps and products)

Answer 3

1. 3 molecules of CO2 convert 3 molecules of 5 carbon RuBp into 3 6 carbon molecules
2. 3 6 carbon molecules break down with water and from 6 molecules of 3-PGA

Question 4

What happens in reduction reactions ( steps and products)

Answer 4

1. 6 3-PGA phosphorylated by 6 ATP to make 6 molecules of 1,3-PGA
2. 6 molecules of 1,3-PGA are reduced by 6 NADPH to make 6 molecules of 63P

Question 5

What happens in RuBp regeneration

Answer 5

5 molecules G3P phosphorylated by 3 ATP and 2 H2O to make three RuBp

Question 6

How many times does the Calvin cycle occur to make a glucose molecule

Answer 6

6 cycles

Question 7

What is the structure of G3P

Answer 7

3 carbon molecule