Photosynthesis

Question 1

Calvin cycle process step 1

Answer 1

Carbon fixation: the enzyme rubisco catalyse the reaction of ribulose biphosphate and CO2 into 2x glycerate-3-phosphate

Question 2

What is the enzyme used in the Calvin cycle?

Answer 2

Rubisco

Question 3

Calvin cycle step 2

Answer 3

Reduction: reduced NADP from the LDR reduces Glycerate-3-phosphate into triose phosphate using energy from ATP. NADPH reduces 2x glycerate-3-phosphate into 2x triose phosphate and energy from ATP.

Question 4

Calvin cycle step 3

Answer 4

Regeneration: some triose phosphate is converted into useful organic compounds like glucose. Some is regenerated back into Ribulose phosphate using energy from ATP to maintain its supply

Question 5

Describe the Calvin cycle

Answer 5

1. CO2 combines with ribulose biphosphate (RuBP)
2. Produces two glycerate (3-) phosphate using the enzyme rubisco
3. 2x GP is reduced to 2x triose phosphate (TP)
4. Using reduced NADP
5. Using energy from ATP
6. Triose phosphate converted to glucose/hexose/RuBP/ ribulose biphosphate/ other named substance