Lecture 20: Light independent reactions of photosynthesis Flashcards
What does the light independent reaction take place?
In the stroma
What carries the energy from light that was transformed into H+, e- (2 compounds)?
NADPH and ATP
What enters the calvin cycle ? (3 compounds)
1) NADPH
2) ATP
3) CO2
What is carbon fixed into during the calvin cycle?
G3P (triose phosphate) *requires RUBISCO
What is rubisco?
a protein most abundant in plant leaves
Does the calvin cycle require darkness?
No, it just doesn’t require light
What happens once G3P leaves the chloroplast?
It goes to the mesophyll cell’s cytoplasm where 2 of 3 carbon molecules combine and produce 6 carbon molecules glucose and fructose
How is sucrose formed?
The combining of glucose and fructose
What is sucrose?
A 12 carbon sugar molecule that provides plant with energy and building blocks for other organic matter like starch and cellulose
How is sucrose transported through the plant?
By phloem
Formula for light independent reaction: (write it out)
24H+ + 24e- + 6CO2 — > C6 H12 O6 + 6H2O
What is a waste product of the calvin cycle?
O2
Where do the light independent reactions take place?
In a plant’s leaf
What is the cellulose and starch source?
Regions of photosynthesis and sugar production (mainly leaves)
What is the cellulose and starch sink?
Regions that do not support photosynthesis, but still need organic molecules to survive (like roots)
