Biology 0610 · IGCSE · Photosynthesis

Photosynthesis — practice question

(a)[1]

Using the information in Fig. 3.1, predict which plant, A or B, will have the lowest rate of photosynthesis. Explain your prediction.

(b)[3]

Explain why a student used iodine solution to demonstrate that photosynthesis had taken place in a leaf.

(c(i))[1]

Identify the highest rate of photosynthesis.

(c(ii))[1]

Calculate the difference in the rate of photosynthesis between 1 and 2 arbitrary units of light intensity.

(c(iii))[1]

Identify the smallest light intensity that produces the maximum rate of photosynthesis.

(c(iv))[2]

Explain why the graph rises as light intensity increases from 0 to 2 arbitrary units.

(d)[1]

Carbon dioxide is one of the raw materials needed for photosynthesis. State the other raw material.

(e)[1]

State the name of the cell structure in which photosynthesis occurs.

(f(i))[3]

Calculate the percentage increase in the rate of photosynthesis for species 1 between 20 ^{\circ}C and 30 ^{\circ}C. Give your answer to three significant figures.

(f(ii))[1]

Tick (✓) one conclusion that can be drawn from the data in Table 3.1.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: plant has no / low / least carbon dioxide AND carbon dioxide is needed for photosynthesis (letter A)

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