(a)[2]
Define the term gene by giving its biological meaning.
(b)[4]
Describe the way proteins are synthesised in a cell.
(c(i))[1]
State the name of the process by which mineral ions enter root hair cells via cell membrane proteins.
(c(ii))[3]
Explain how protein molecules transport ions across a membrane in this process.
(d)[2]
State the names of two proteins found in the blood.