Studied by 6 people
What is photosynthesis?
Synthesis of light
What is the byproduct of photosynthesis?
O2
What is the electron carrier
NADP+
Where does photosynthesis occur
Chloroplasts
What are light reactions?
Uses energy of light to make ATP and NADPH
What are light independent reactions
Use ATP NADPH and CO2 to make carbs
What are photons?
Particles of light
How can photons interact with matter
Bounces, pass through, absorbed
What light does chlorophyll absorb
blue and red light
What are pigments
moleules that absorb visible light
What is a resonance energy transfer?
energy transfer between two light sensitive molecules
What are light harvesting complexes?
Several chlorophylls that gather light energy
What is the reaction center?
Central chlorphyll molecule
Where are thylakoids located
Interior membrane
What is stroma?
liquid inside of the interior membrane but outside the thylakoids
What is the Calvin Cycle
Light independent reactions that use ATP and NADPH to reduce CO2 to carbs
What powers ATP synthase?
H+ gradient
Which comes first, photosystem 1 or 2
2
What does Photosystem I do?
uses light energy to continue movement of electrons from photosystem 2 to reduce NADP or uses light energy to create an H+ gradient to fuel ATP synthesis
What does photosystem II do?
uses light energy tooxidize water and create H+ concentration to fuel ATP synthesis
What charge does the reaction center have?
Positive Charge
Where does the reaction enter get energy from?
Uses energy from photons to redue an electron acceptor
What are the 3 steps of the Calvin Cycle?
Carbon fixation, Reduction, Regeneration
What happens in carbon fixation?
CO2 and RuBP bind and then split
What happens in reduction?
the products forfixation are phosphorylated and reduced
What happens in regeneration
RuBP is regenerated
How many glucoses are produced for every CO2
1 glucose per 6 CO2
True or false: the Calvin Cycle uses light directly
false-it is stimulated by light by increasing the pH and activating rubisco
What is the Calvin Cycle’s main enzyme?
Rubisco
What is the purpose of photorespiration
Reduces sugar production
What is rubisco?
catalyzes the reaction of RuBP
What is the relationship between rubisco, CO2, and O2?
Rubisco wants CO2 more but photosynthesis increases with O2 concentration
What is the first product of carbon fixation of a C3 plant
Glyceraldehyde 3-phosphate
Examples of C3 plants
wheat and rice
What is the first product of carbon fixation of a C4 plant
oxaloacetate
Examples of C4
Corn and sugarcane
What is the first product of carbon fixation of a CAM plant
Organic Acids
Examples of CAM plants
Pineapple and most cacti
Note 
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