1. A. List three ways in which transcription differs from translation in protein synthesis.
B. Name the structures labelled A to C. ( 3m)
A
B.
c.
C. Describe two structural features which adapt tRNA to its role in translation.
2. A. Describe the main feature of replication of DNA.
B. DNA is a very important molecule in living organisms as it carries the genetic code.
Before a cell divides, the DNA molecule replicates so that each resulting daughter cell is genetically identical to the original parent cell.
(a) Explain the nature of the genetic code.
3. Explain, using a named example ( cystic fibrosis ) how gene mutation may affect the phenotype of an organism.