DNA Replication (2.1.2)

HideShow resource information
By what process is DNA copied?
Semi-conservative replication.
1 of 7
What stage of the cell cycle does semi-conservative replication occur?
Interphase- when the cell prepares to divide.
2 of 7
What is semi-conservative replication?
Where each new DNA molecule is made from one original strand and one new strand.
3 of 7
Describe the process of semi-conservative replication.
DNA helix unwinds. H-bonds between bases break-DNA helicase. Free DNA nucleotides in nucleus join with exposed bases on strands. New H-bonds form in complementary base pairing. New sugar-phosphate backbone joins by covalent bonds-DNA polymerase.
4 of 7
Are the new DNA molecules different to the orginal?
No, they are identical. The original strands are used as templates to make the new strands.
5 of 7
What does DNA helicase do?
Unwinds and unzips DNA by breaking the hydrogen bonds between bases.
6 of 7
What does DNA polymerase do?
Links the newly arrived nucleotides by forming covalent bonds between phosphates and sugars. It only does this if the nucleotides are correctly paired.
7 of 7

Other cards in this set

Card 2

Front

What stage of the cell cycle does semi-conservative replication occur?

Back

Interphase- when the cell prepares to divide.

Card 3

Front

What is semi-conservative replication?

Back

Preview of the front of card 3

Card 4

Front

Describe the process of semi-conservative replication.

Back

Preview of the front of card 4

Card 5

Front

Are the new DNA molecules different to the orginal?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA, genetics and evolution resources »