O-LevelBiologyGenetics & Variation5090/22 · May/June 2017 · Q512 Marks

Fig. 5.1 shows cells with some of their structures missing. [Figure 5.1] not to scale

(a)On the cells in Fig. 5.1, draw and label nuclei and chloroplasts in their appropriate positions.[4]
(b)State which cell has been produced by meiosis and name the organ in which it has been produced. cell organ[2]
(c)Explain how energy plays an important part in the function of each of these cells. cell H cell J cell K[6]

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Mark scheme

Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.

[4] (a) (H) nucleus drawn in cytoplasm + labelled ; (J) nucleus drawn in cytoplasm + labelled ; (K) nucleus drawn in cytoplasm + labelled ; chloroplast(s) drawn only in (H) + at least one labelled ;
[2] (b) (cell) sperm / male gamete / (cell) K; (organ) testis / testicle / testes ;
[6] (c) (cell H) 1 traps / absorbs / needs / uses / converts + light (energy); 2 reference to photosynthesis OR production of glucose / starch / carbohydrate OR into chemical energy OR cell division / mitosis OR growth OR protein synthesis ; (cell J) 3 active transport / against a concentration gradient AW ; 4 intake AW of + ions / minerals / salts ; (cell K) 5 movement / use / action + of tail / flagellum ; 6 movement / motility / mobility / locomotion / swimming AW ;

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