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CAIE A-Level Biology A2 13.2.2 Effects of Limiting Factors Questions

Explain effects of limiting factors on photosynthesis using evidence from each question and mark scheme.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • Explain the effects of limiting factors on photosynthesis.

CAIE A-Level Biology A2 13.2.2 Effects of Limiting Factors Questions question 1

[Maximum number: 4]

Question (a)

(a)

Fig. 8.1 shows how the rate of uptake of carbon dioxide by a plant varies with temperature, at an optimum intensity of light on a clear day.
rate of uptake of carbon dioxide / arbitrary units (au)

Fig. 8.1

Fig. 8.1

[ 4 ]

Question (i)

(i)

Suggest why the rate of carbon dioxide uptake levels off and then decreases after 20∘C20^{\circ} \mathrm{C}.

[ 3 ]

Question (ii)

(ii)

On Fig. 8.1, draw a curve to show the uptake of carbon dioxide on a cloudy day.

[ 1 ]
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