photosynthesis

1
The light independent reaction takes place in
the... This is so that... The reaction needs
supplies of ...., .... and .... The reaction
produces ... and ... The reaction is not light
dependent but it is ... dependent because it
relies on ... Now... Write a full list of
limiting factors. Explain each limiting factor in
terms of the light dependent and light
independent reactions.
2
Photosynthesis(Part 2)
3
Light Independent stage

• Energy from ATP, hydrogens and electrons from
  reduced NADP are used to reduce carbon dioxide to
  produce carbohydrate.
• This happens in the stroma.

4
Light independent stage
light independent reaction
5
(5C)
Ribulose Biphosphate
(1C)
2X Glycerate-3-Phosphate
(3C)
2X Triose Phosphate
(3C)
(6C)
Glucose
6
What happens without light?

• Which stages can still continue when the light is
  turned off?
• Which molecules will build up when the light is
  turned off?

7
Exam question
Suggest why after the light was switched off the
amount of GP... a) Increased immediately b)
levelled out after a time
8
Sketch the curve to show what happens to the
amount of RuBP after the light has been switched
off, Explain your answer. Sketch what would
happen if CO2 was removed with the light left on.
9
The light dependent reaction takes place on
the... This is so that... The reaction needs
...., ...., .... and .... The reaction produces
.... and ... .... is also produced. The ... and
...pass into the ... for the second stage in
photosynthesis.