CAIE A-Level Biology A2 13.1.1 Chloroplast Structure Function Relationship Questions

Explain the chloroplast structure-function relationship using evidence from each question and mark scheme.

Exam points

Explain the chloroplast structure-function relationship.

[Maximum number: 4]

Chloroplasts carry out photosynthesis.
Fig. 1.1 shows some structural features of a chloroplast and some processes that occur within it.

Fig. 1.1

Explain how the structure and appearance of the granum, and the components labelled A, relate to their function.

any four from:

up to three descriptions (D) and one/two linked functions (F)

D1 stacked / many (A / thylakoids) / large surface area ;

F2 to increase light absorption ;

D3 (thylakoid) membrane has, (named), pigments / photosystems / electron carriers / enzymes ;

F4 (thylakoid membrane role is) light-dependent reaction / photophosphorylation / creates proton gradient / pump protons / chemiosmosis / makes ATP ;

D5 (thylakoid) lumen / space ;

F6 accumulates $\mathrm{H}^{+}$ / high $\mathrm{H}^{+}$ concentration ;

D7 appear green (under microscope) ;

F8 as / so, chlorophyll absorbs red and blue light ;

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CAIE A-Level Biology A2 13.1.1 Chloroplast Structure Function Relationship Questions question 1