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A-level Photosythesis
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What is the source of oxygen released during photosynthesis?
Photolysis
What effect does increasing light intensity have on photosynthesis?
Rate increases until another factor becomes limiting
What are the three limiting factors of photosynthesis?
Light intensity, carbon dioxide concentration, temperature
What is the fate of some TP molecules?
Used to form glucose and other organic molecules
What is the fate of most TP molecules?
Regenerate RuBP
What happens to TP to form glucose?
Two TP molecules combine to form one hexose sugar
What happens to GP in the Calvin cycle?
It is reduced to TP using ATP and NADPH
What is the role of RuBP in photosynthesis?
CO₂ acceptor in the Calvin cycle
What molecule is formed when CO₂ combines with RuBP?
GP (glycerate-3-phosphate)
What enzyme catalyses carbon fixation in the Calvin cycle?
RuBisCO
What is the role of reduced NADP (NADPH)?
Provides hydrogen/reducing power in the Calvin cycle
What is the role of ATP in photosynthesis?
Provides energy for the Calvin cycle
Which molecule accepts electrons at the end of the electron transport chain?
NADP
What is photolysis?
Splitting of water using light energy
What are the products of the light-dependent reactions?
ATP, reduced NADP (NADPH), and oxygen
What is the source of electrons in the light-dependent reactions?
Photolysis of water
Where does the Calvin cycle take place?
Stroma
Which pigment is primarily responsible for absorbing light energy?,
Chlorophyll a
In which organelle does photosynthesis occur?,
Chloroplast
What is the overall equation for photosynthesis?,
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
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