2.2 DNA replication Flashcards
1
Q
what is semi-conservative replication?
A
one strand of the new DNA is original and the other one is new
2
Q
what are the stages of the semi-conservative replication?
A
- separating of strands
- attraction of nucleotides
- binding of nucleotides
- new strands
3
Q
DNA replication key points:
A
- DNA helicase causes the two strands to unwind
- the two strands act as templates
- the free flowing nucleotides in the nucleus attach to their complimentary base pair
- DNA polymerase joins the nucleotides together
- new DNA molecule contains one new strand and one original strand
4
Q
what does DNA helicase do in DNA replication?
A
breaks the H bonds between the complimentary base pairs
= unwinds the strands
5
Q
what do the two strands act as in DNA replication?
A
template strands
6
Q
what does DNA polymerase do?
A
catalyses the condensation reaction between the free flowing nucleotides
= joining them together
7
Q
what does the joining of the free flowing nucleotides form?
A
- formation of the sugar phosphate backbone
- formation of phosphodiester bonds
