Calvin Cycle (Carbon fixation stage)

Question 1

Part 1

Answer 1

Carbon dioxide from the atmosphere enters the chloroplast,
The enzyme rubisco fixes carbon dioxide by attaching it to Ribulose biphosphate (RuBP)
This forms 3-phosphoglycerate (3PG).

Question 2

Part 2

Answer 2

The 3PG is phosphorylated (has phosphate added) by ATP and is combined with hydrogen from NADPH to form glyceraldehyde-3-phosphate (G3P)

Question 3

Part 3

Answer 3

G3P is used to regenerate the RUBP and for the synthesis of glucose

Question 4

Uses of glucose

Answer 4

Synthesised into starch - storage carbohydrate
Synthesised into cellulose
Also can become fats, proteins or nucleic acids