By: Megan Smith


DNA is the chemical name for the molecule that carries genetic instructions in all living things.


DNA Structure and Replication: Crash Course Biology #10

What does DNA do?

DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that an be used to produce proteins, which are the complex molecules that do most of the work in our bodies.


DNA is heredity, this is why everyone looks like their parents or close family members.


The enzyme DNA helicase unzips the DNA double helix, breaking the hydrogen bonds that hold the nitrogen bases together

Protein Production

It consists of 2 major steps: transcription & translation together transcription and translation are known as gene expression.

What is RNA?

Ribonucleic acid is one of the three major biological macromolecules that are essential for all known forms of life (along with DNA and proteins).

Types of RNA

  • rRNA or Ribosomal RNA
  • mRNA or messenger RNA
  • tRNA or Transfer RNA