2.1.16 DNA Flashcards
0
Q
How is a new copy of a DNA molecule made?
A
1- double helix untwists
2 - Hydrogen bonds break apart between bases to ‘unzip’ DNA
3 - This exposes the bases
4 - free DNA nucleotides are bonded onto the exposed bases, sugar-phosphate backbone is reformed
5 - covalent bonds are formed
This is described as semi-conservative replication
1
Q
How is a DNA molecule formed?
A
when two polynucleotides come together
2
Q
DNA is a stable _______?
A
Polynucleotide
3
Q
Why are the molecules long?
A
large amount of information can be stored
4
Q
What do base-pairing rules do?
A
Means complementary strands of information can be replicated
5
Q
What do hydrogen bonds do?
A
allow for easy unzipping for copying and reading information
6
Q
What is are complementary base pairings?
A
A - T(U)
C - G
