DNA

1
DNA

• Double helix
• Twisted row of nucleotides
• Each nucleotide consists of
• Nbase
• Sugar
• Phosphate group

2
DNA nucleotide

• Base contains Nitrogen
• 4 types A, T, C, G
• Deoxyribose sugar
• Phosphate group

3
DNA

• A base always pairs with a T base
• C pairs with G
• Base pairs are held together by weak hydrogen
  bonds

4
DNA model
http//www.biologylessons.sdsu.edu/classes/lab8/la
b8.html
5
Chromosomes Karyotype
6
Portion of DNA
7
Protein synthesis
8
Transcription DNA to mRNA
9
Translation mRNA and tRNA
Source http//www.acsu.buffalo.edu/jbarnard/GtRN
A.html
10
Links for help with DNA