Photosynthesis (OCR A-Level Biology A): Flashcards
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Limiting factor definition
Limiting factor definition
Environmental variable restricting a biochemical process rate
Optimum temp. for photosynthesis
Optimum temp. for photosynthesis
25-30°C
Q10 value for enzyme reactions
Q10 value for enzyme reactions
Approximately 2
Stage affected by temperature
Stage affected by temperature
Light-independent stage (Calvin cycle)
Normal atmospheric CO2 %
Normal atmospheric CO2 %
0.04% (400 ppm)
Rubisco function
Rubisco function
Catalyses CO2 fixation in light-independent stage
Photorespiration definition
Photorespiration definition
Rubisco binds O2 instead of CO2, reducing efficiency
GP conc. when light decreases
GP conc. when light decreases
Increases initially
RuBP conc. when CO2 decreases
RuBP conc. when CO2 decreases
Increases (accumulates as CO2 acceptor)
Light intensity vs distance relationship
Light intensity vs distance relationship
Inversely proportional to distance squared (1/d²)