Photosynthesis (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Where is Photosystem I (PSI) located in chloroplasts?
Where is Photosystem I (PSI) located in chloroplasts?
Outer surfaces of grana & intergranal lamellae
What wavelength of light does P680 in PSII absorb?
What wavelength of light does P680 in PSII absorb?
680 nm
What are the three products of photolysis of water?
What are the three products of photolysis of water?
Protons, electrons & oxygen
What is the pH inside the thylakoid space during chemiosmosis?
What is the pH inside the thylakoid space during chemiosmosis?
Approximately 4.0
Which products are made by cyclic photophosphorylation?
Which products are made by cyclic photophosphorylation?
ATP only
Where in the chloroplast does the Calvin cycle occur?
Where in the chloroplast does the Calvin cycle occur?
Stroma
In carboxylation, Rubisco combines CO₂ with which 5-carbon molecule?
In carboxylation, Rubisco combines CO₂ with which 5-carbon molecule?
Ribulose bisphosphate (RuBP)
How many ATP & reduced NADP are used per CO₂ fixed in the Calvin cycle?
How many ATP & reduced NADP are used per CO₂ fixed in the Calvin cycle?
One ATP & one reduced NADP
What fraction of triose phosphate (TP) is used to regenerate RuBP?
What fraction of triose phosphate (TP) is used to regenerate RuBP?
Five-sixths (5/6)
When does photorespiration occur?
When does photorespiration occur?
Hot conditions; stomata close; low CO₂