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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-AB-CA-0011 markL1 FoundationCalculatorCalvin cycle

The enzyme that fixes CO₂ in the Calvin cycle is

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0121 markL1 FoundationCalculatorCalvin cycle

The Calvin cycle takes place in the

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0021 markL2 StandardCalculatorCalvin cycle

CO₂ combines with RuBP to form

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0031 markL2 StandardCalculatorCalvin cycle

GP is reduced to triose phosphate using

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0041 markL2 StandardCalculatorCalvin cycle

How many turns of the Calvin cycle are needed to make one hexose?

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0071 markL2 StandardCalculatorLimiting factors

A limiting factor is

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0081 markL2 StandardCalculatorLimiting factors

On a graph of rate against light intensity, the plateau shows that

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0091 markL2 StandardCalculatorCalvin cycle

Most triose phosphate made in the cycle is used to

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0101 markL2 StandardCalculatorC4 and data

C4 plants such as maize are efficient in hot conditions because

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0111 markL2 StandardCalculatorLimiting factors

Very high temperatures reduce photosynthesis mainly because

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0052 marksL3 ExamCalculatorCalvin cycle

Each CO₂ fixed needs 3 ATP and 2 reduced NADP. How many ATP are needed per glucose?

Salam Academy Original Practice · Proposed mark scheme

SA-AB-CA-0061 markL3 ExamCalculatorCalvin cycle

When a plant is moved into darkness, GP concentration

Salam Academy Original Practice · Proposed mark scheme