Ch. 23 Calvin Cycle Flashcards
Where does the calvin cycle take place?
Stroma
What enzyme catalyzes the fixation of CO2?
Rubisco
How many CO2 molecules are needed to create one glucose?
6
What is the net reaction of the calvin cycle?
6CO2 + 18ATP + 12 NADPH + 12H2O»_space;>
Glucose + 18ADP + 18Pi + 12 NADP+ + 6H+
What molecules stimulate light reactions?
Low Mg
Acidic/ High H+
NADP+
What molecules stimulate dark reactions?
High Mg
Alkaline/ Low H+
NADPH
How does thioredoxin regulate the calvin cycle?
Ferredoxin reduces thioredoxin
Reduced theioredoxin activates rubisco and other enzymes by reducing disulfide bridges
Where does CO2 fixation and photosynthesis occur in C3 plants?
Mesophyll cells
Where does CO2 fixation and photosynthesis occur in C4 plants?
Carbon fixation- Bundle sheath cells
Photosynthesis- mesophyll cells
