Explain the process of DNA replication (6 marks).

The parental DNA is unwound from its double helix structure.DNA Helicase enzymes break hydrogen bonds between the bases of the parental DNA.DNA polymerase enzymes add free nucleotides to the daughter strands using complementary base pairing.Leading strand synthesised continuously whereas lagging strand synthesised in fragments.DNA Ligase enzymes seal fragments.This forms two identical daughter strands.

GH

Related Biology GCSE answers

All answers ▸

Why was Charles Darwin's theory of evolution by natural selection not accepted at the time?


Why do cells divide and how do they do this?


Why do different blood vessels have different lumen sizes (relative to their overall size)?


Pathogens are disease-causing organisms which can infect humans. Bacteria and viruses are two examples of pathogens. Explain the differences between bacteria and pathogens and give an example of each.