Biology 9700 · AS & A Level · Photosynthesis as an energy transfer process

Photosynthesis as an energy transfer process — practice question

Fig. 8.1 illustrates several reactions occurring within a palisade mesophyll cell.
(a(i))[3]

Identify the substances A, B and C.

(a(ii))[1]

Name exactly the process that forms reduced NADP.

(a(iii))[2]

Name the reaction type used to make starch from hexose sugars, and identify the bonds that are formed.

(a(iv))[3]

Describe the route taken by carbon dioxide from the external atmosphere to the inside of a palisade mesophyll cell.

(b)[3]

The optimum pH for rubisco activity is pH 8. Explain why illumination of chloroplasts creates optimum pH conditions for rubisco.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: A corresponds to RuBP

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