Photosynthesis Flashcards
Photosynthesis converts CO2 + H2O + sunlight into
Carbohydrates + O2
Photosynthesis is done by:
Plants, bacteria + algae
What are the two stages of Photosynthesis?
- Light-dependent
- Dark Reactions
A Light-dependent requires
Photons + water
What do Light-dependent reactions produce?
ATP + NADPH (reducing agent)
Dark reactions do not depend on
Photons
What is another name for the Dark reactions?
Calvin Cycle
The Calvin Cycle takes in the ATP + NADPH produced by the light-dependent reactions and forms
G3P
What acts as a source of Carbons for the Calvin Cycle?
CO2
Light-dependent use light energy and water to produce
ATP
Light-dependent reactions reduce NADP+ into
NADPH
Light-dependent reactions form
ATP, NADPH + O2
Light-dependent reactions happen in the
Thylakoid membrane of the chloroplast
Photon energy excites electrons of
P680
P680 is a strong oxidizing agent that gets its electrons from
Water
NADPH Production starts at
P700
The excited electron of P680 then goes to
P700, reducing NADP+ into NADPH
What happens as electrons move to lower energy states?
Hydrogen ions are pumped through the membrane, fueling the production of ATP via the synthase
How does the Calvin Cycle produce sugar?
It takes light-dependent products and use with CO2
The fluid in the chloroplast is called the
Stroma
Stroma has folded stacks called
Thylakoids
Carbon Fixation is done by the
Byproducts of light-dependent reactions, or during the Calvin Cycle
Carbon Fixation is done in the
Stroma
RuBisCo is an enzyme which
Catalyzes reaction between Co2 and RuBP without using ATP
What RuBisCo picks up depends on
Concentration and temperature
In higher temperatures, RuBisCo has a higher affinity for
O2
At milder temperatures, RuBisCo has a higher affinity for
CO2
