Matching Pairs Info Project Olivia Young and Meghan clancy

What is DNA?

DNA is...

  • the molecule of life. All living things contain DNA.
  • DNA is found in the nucleus of cells.
  • DNA contains genetic codes that determine physical features.

The Composition and Organization of DNA

  • DNA contains deoxyribose (a 5-carbon sugar)
  • DNA is a nucleic acid (molecule made up of nucleotides)

The molecular structure consists of 4 different nitrogen bases:

  • Adenine
  • Guanine
  • Cytosine
  • Theymine

Nucleic Acids of DNA

The Nucleotide's in DNA consist of a sugar molecule attached to a nitrogen base and a phosphate group.

  • Nucleotide's have 3 parts:
  1. Sugar
  2. Nitrogen Base
  3. Phosphate

Base-Pairing Rules

DNA is a double stranded molecule and those strands are connected by the nitrogen bases: Adenine, Thymine, Guanine, and Cytosine.

  • Adenine can only pair with Thymine and Guanine can only pair with Cytosine.

Purines and Pyrimidines

The molecular structure of the 4 bases fall under two categories: Purines and Pyrimidines.

  • Purines are double string structures. Adenine and Guanine are the purines of DNA
  • Pyrimidines are single structures. Thymine and Cytosine are the pyrimidines of DNA
  • As discussed earlier, Purines always bond with Pyrimidines.


Created with images by Caroline Davis2010 - "DNA" • Caroline Davis2010 - "DNA" • Caroline Davis2010 - "DNA" • Caroline Davis2010 - "DNA" • Caroline Davis2010 - "DNA"

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