Calvin Cycle

Question 1

Occurs in?

Answer 1

Stroma

Question 2

Requires?

Answer 2

ATP and NADPH

Question 3

General description

Answer 3

1. Carbon fixation
2. Reduction
3. Regeneration

Question 4

Describe carbon fixation

Answer 4

Carboxylation process

• RuBP(5C sugar) is CO2 acceptor
• catalyse by RUBISCO to px 2 glycerate-3-phosphate

Question 5

Describe reduction

Answer 5

• glycerate 3phosphate is phosphorylated by ATP to form 1,3-bisphosphoglycerate
• then reduced by NADPH to form glyceraldehyde 3-phosphate

Question 6

Describe regeneration

Answer 6

• G3P is used to regenerate RuBP
• 5 G3P (15C) are used to regenerate 3 RuBP
• 3 ATP are used
• 1 glucose molecule = two G3P