Lecture 12 Flashcards
(18 cards)
What the light dependent reactions provide?
They provide the energy used to create sugars
What is carbon fixation?
The conversion of inorganic carbons into organic carbons
Where does the Calvin cycle take place?
In the stroma
What steps does the Calvin cycle involve?
- Carbon fixation
- Reduction
- Regeneration of ribulose 1,5- biphosphate
How many turns does it takes to yield 1 glucose in the Calvin cycle?
6
When g3p is formed what happens to it?
It is transported out of the chloroplast where reverse reactions of glycolysis produce fructose-6 phosphates and glucose- 6 phosphates
What does rubisco do?
it catalyzes carbon fixation
What is photorespiration?
the process which incorporates oxygen to RuBP, it is also catalyzed by rubisco.
Why do plants photorespire?
To protect themselves from photo oxidative damage
What are c3 plants?
The type of plant that does not possess any mechanism to regulate photorespiration
What is c4 plants?
Plants where the CO2 fixation to PEP and the calvin cycle occur in 2 different cells
What are CAM plants?
The PEP pathway and the calvin cycle occur within the same cell but at different time during the day
Where does co2 fixation occur in c4 plants?
mesophyll cell
Where do the calvin cycle occur in c4 plants?
bundle sheath cell
What are examples of c4 plants?
corn, sugar cane and grass
What are examples of CAM plants?
cacti and pineapples
When does the calvin cycle happen in CAM plants?
during the day
Where reactions occur in the CAM plant?
mesophyll cell
