Light Independent Reaction

Question 1

Summary?

Answer 1

• The ATP and reduced NADP from the
  the light-dependent reaction is used to reduce carbon
  dioxide in the second part of photosynthesis, the
  light-independent stage.
• Occurs in the stroma of the chloroplasts.

Question 2

Phase One?

Answer 2

1) CO2 enters the leaf through the stomata and diffuses into the stoma of chloroplasts.
2) It combines with RUBP (ribulose biphosphate) and creates an unstable 6-carbon compound which breaks into 2 molecules of a 3-carbon molecule called GP (glycerate phosphate).
3) The enzyme Rubisco (ribulose bisphosphate
carboxylase) catalyses the reaction between the
two.

Question 3

Phase Two?

Answer 3

1) ATP from the light-dependent reaction provide energy to turn the 3-carbon GP into a different 3-carbon compound called triose phosphate (TP).
2) This reaction also requires H+ ions which come
from reduced NADP (also from the light-dependent reaction) NADPH is recycled to NADP.
3) TP is then converted into many useful organic
compounds such as glucose.