Biology 9700 · AS & A Level · Structure of nucleic acids and replication of DNA

Structure of nucleic acids and replication of DNA — practice question

Fig. 1.1 depicts a stage within the mitotic cell cycle of an animal cell.
(a(i))[1]

State the mitosis stage that is shown in Fig. 1.1.

(a(ii))[3]

State three characteristics that are typical of the mitotic stage shown in Fig. 1.1.

(b)[3]

Explain the importance of mitosis in organisms.

(c)[2]

In many multicellular organisms, such as mammals, the length of the mitotic cell cycle differs greatly between tissues, yet it is tightly regulated in each cell. Suggest why this regulation is important in mammals.

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