DNA Structure Flashcards
1
Q
What are the two strands joined together by in a DNA?
A
By hydrogen bonding between the bases
2
Q
What is each base in a DNA joint with?
A
Each base can only join with one particular partner - this is called complementary base pairing
3
Q
What does Adenine always pair up with?
A
Thymine
4
Q
What does Guanine pair with up with?
A
Cytosine
5
Q
What forms between A & T?
A
2 Hydrogen bonds
6
Q
What forms between C & G?
A
3 hydrogen bonds
7
Q
Describe the structure of polynucleotides in DNA?
A
The two polynucleotides strands are antiparallel which means they run in opposite directions and they twist to form a DNA double helix
8
Q
What is DNA composed of?
A
Composed of two polynucleotides strands joined together to form a double helix shape.
