A-LevelBiologyThe mitotic cell cycle9700/21 · Oct/Nov 2017 · Q16 Marks

Fig. 1.1 is a photomicrograph of plant cells showing stages in cell division.

(a)On Fig. 1.1, draw a circle around a cell in anaphase.[1]
(b)Suggest the advantages of using a light microscope, rather than an electron microscope, to study cell division.[2]
(c)Mitosis is important in producing more cells for plant growth. Describe three other ways in which mitosis is important in plants.[3]

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Mark scheme

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

[1] (a) ; (a drawing of a cell in anaphase circled in Fig 1.1)
[2] (b) two from can observe living, specimens / cells; (so) the process of mitosis can be seen happening / AW ; R easier to see mitosis happening I to study cell division ease of use, qualified; e.g. no need for heavy metal staining, preparation of specimen less time-consuming I ref. to colour I portable
[3] (c) three from production of genetically identical cells ; asexual reproduction; repair of damaged tissue ; A replace damaged cells R repair damaged cells replace, dead / worn out / old / non-functioning, cells; replace, dead / worn out / old / non-functioning, cells; gamete production in context ;

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