(a(i))[3]
Name the parts D, E and F in Fig. 3.1.
(a(ii))[1]
State one structural difference between DNA and messenger RNA.
(b)[4]
Explain how a molecule of telomerase makes additional lengths of DNA.
(c)[1]
Suggest why prokaryotes do not have telomerase.
(d)[2]
Explain why determining the activity of telomerase may be useful in the diagnosis of lung cancer.