Photosynthesis Light-Independent Reactions Flashcards
Light independent reactions occur?
stroma of chloroplasts
Light dependent reactions occur? Type of Process? Uses? Produces?
Thylakoids
Endergonic
Light energy and water
ATP and NADPH
3 phases of Calvin Cycle
- Carbon fixation
- Reduction
- Regeneration
Carbon fixation
carbon converted from inorganic to organic form when each CO2 joined with unstable RuBP(5C) to make 6C organic molecule (catalyzed by rubisco) into 2 PGA
Plants that use carbon fixation are called _________
C3 plants. Pathway is called C3 photosynthesis
Reduction
G3P (3C) molecules are produced using each PGA phosphorylated by ATP and reduced by NADPH
In reduced high energy state, how many G3P’s will leave the cycle to become glucose
2 out of 12
Regeneration
RuBP(5C) is reformed from G3P using energy from ATP
12 G3P molecules produced in 6 cycles
10 used to regenerate RuBP
2 used to make 1 glucose
Net equation for Calvin Cycle
6CO2 + 18ATP + 12NADPH + water –> 2G3P + 16P + 12 NADP+
Starting substance for many organic molecules like glucose, sucrose, starches?
G3P
Light Independent uses? involves?
Uses ATP and NADPH to form G3P
- Returns ADP, inorganic phosphate and NADP to the light dependent reaction
- Calvin cycle
Light dependent uses? involves?
Uses light energy from ATP and NADPH
- Splits water through photolysis to provide replacement electrons and H to release O2
- ETC and PS1 and 2
______ molecules of _______ combine with RuBP with help of enzyme ______.
3, CO2, rubisco
For every 12 molecules of G3P made in Calvin cycle, how many are used to make glucose?
2
