GCSE Biology (CIE)

Topic Summaries

Cell division, reproduction, and DNA structure

DNA

  • The genetic material in the nucleus of a cell is made up of a chemical called DNA which is made up of two strands forming a double helix.
  • The DNA is contained in structures called chromosomes, and a gene is a small section of DNA on a chromosome.
  • Each gene codes for a sequence of amino acids that makes a specific protein.
  • The genome is the entire genetic material of an organism.

Unlock DNA

Sign up to unlock the rest of this topic — plus every other topic, video, flashcard set and eBook guide in your SnapRevise+ subscription.

Cancel anytime — instant access the moment you sign up.