1
Q
DNA bases
A
A - Adenine
T - Thymine
C - Cytosine
G - Guanine
A always pairs with T
C always pairs with G
• The complementary base pairs are joined together by weak hydrogen bonds
2
Q
Shape and structure of a DNA molecule
A
- Double Helix
- Sugar Phosphate Backbone
- Bases
- Weak hydrogen bonds between bases
- Adenine joins with Thymine
- Guanine joins with Cytosine
- These are complementary base pairs
