Dna Structure Flashcards
1
Q
Structure
A
Composed of 2 polynucleotide strands which wind around eachother to form double helix
Really long and coiled up tightly so a lot of genetic information can fit into small space
2
Q
Dna Nucleotide structure
A
Phosphate group
Pentose sugar known as deoxyribose
Nitrogen base.
Each dna molecule has the same sugar and phosphate but different base
Adenine thymine guanine cytosine
3
Q
How to 2 dna polynucleotide strands join together ?
A
By hydrogen bonds between basses
A-T 2 hydrogen bonds
G-C 3 hydrogen bonds
Equal amounts of each base
4
Q
Ends of the polynucleotide strand
A
One has phosphate group
Other had hydroxyl group arrcahed to sugar
Anitparallel
