(a)[2]
Explain the meaning of the term gene.
(b)[1]
Name the main stage of the cell cycle in Fig. 5.1 during which most mRNA and ATP is made.
(c(i))[3]
On Fig. 5.2: finish the ATP molecule diagram; write the base name in the space provided; write the sugar name in the space provided.
(c(ii))[1]
The base shown in Fig. 5.2 has a double-ring structure. State the term used for a base with a double-ring structure.
(d)[3]
Suggest and explain the role of mitosis in producing blood cells from the bone marrow stem cells.