9700/23

Biology 9700/23May/June 2011

Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme

6
questions
60
marks
75
minutes

Topics Nucleic Acids and Protein Synthesis · Transport in Plants · The Mitotic Cell Cycle · Cell Membranes and Transport · Biological Molecules · Transport in Mammals · +1 more

Q1The Mitotic Cell CycleFree sample

Fig. 1.1 shows a stage in the mitotic cell cycle in an animal cell.

(a)
(i)

Name the stage of mitosis shown in Fig. 1.1.

1M
(ii)

State three features which are characteristic of the stage of mitosis shown in Fig. 1.1.

  1. ______

  2. ______

  3. ______

3M
(b)

Explain the importance of mitosis in organisms.

3M
(c)

In many multicellular organisms, such as mammals, the time taken for the mitotic cell cycle varies considerably between different tissues, but is very carefully controlled in each cell.

Suggest the importance of this control in mammals.

2M

The rest of this paper

5 more questions
  • Q2Nucleic Acids and Protein Synthesis11M
  • Q3Cell Membranes and Transport · Biological Molecules · Nucleic Acids and Protein Synthesis · Transport in Plants11M
  • Q4Transport in Mammals9M
  • Q5Transport in Plants10M
  • Q6(outdated) Ecology10M
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