(a(i))[2]
Identify the stages of mitosis taking place in the cells labelled B and C in Fig. 1.1.
(a(ii))[3]
Describe how the chromosomes behave in the mitosis stage shown in cell A in Fig. 1.1.
(a(iii))[3]
Cell D in Fig. 1.1 is in interphase. Describe the function of DNA ligase in interphase.
(b(i))[1]
State the position of telomeres on a chromosome.
(b(ii))[2]
Some people with a long lifespan have cells showing higher than normal telomerase activity. Suggest why a long lifespan could be the result of higher telomerase activity.