(a(i))[1]
Insulin is one member of an important set of chemicals produced by the body. State the name of this set of chemicals.
(a(ii))[1]
State the place in the body where insulin is made.
(a(iii))[1]
State the role of insulin.
(b)[1]
A person with diabetes may require regular insulin injections. State how the insulin is carried to different parts of the body.
(c(i))[2]
Define genetic engineering.
(c(ii))[1]
State one example of genetic engineering used in crop plants.