(a(i))[2]
Describe what the term gene means.
(a(ii))[1]
State the role of insulin in the human body.
(a(iii))[1]
Describe one further use of genetically modified organisms.
(a(iv))[2]
State two reasons why bacteria are useful for genetic modification.
(b)[2]
State two ways in which bacterial cells differ from plant cells.