Briefly describe the steps of DNA replication and the enzymes involved.

DNA helicase breaks the hydrogen bonds that bind the two strands of the DNA double helix.Free nucleotide complementary base pairs are added to the newly exposed single strands of DNA.Binding of the free nucleotides to the complementary base pairs is catalyzed by DNA polymerase.

Related Biology A Level answers

All answers ▸

Describe the structure of the cell membrane.


Explain, in terms of the movement of ions, the shape of a typical action potential.


Define ADH and describe the mechanism of its action


Describe how an antibody works?