Biology flashcards

HideShow resource information
What does DNA replicate by?
Semi-conservative replication -> because half of the strands in each new DNA molecule are from the original DNA molecule.
1 of 6
How is it easy for DNA to copy itself?
DNA molecules have base pair structure.
2 of 6
What is the 1st step of DNA replication?
The enzyme ( DNA helicase) breaks the hydrogen bonds between bases on the 2 polynucleotide DNA strands --> this makes the helix unwind creating 2 single form strands.
3 of 6
What is the 2nd step of DNA replication?
Each original single strand acts as a template for a new strand-> complementary base pairing means free floating DNA nucleotides are attracted to their complementary exposed bases on each original template strand.
4 of 6
What is the 3rd step of DNA replication?
Condensation reactions join the nucleotides of the new strands together. Catalysed by the enzyme POLYMERASE-->Hydrogen bonds form between the bases on the original and new strands.
5 of 6
What does each new DNA molecule contain?
One strand from the original DNA molecule and one new strand.
6 of 6

Other cards in this set

Card 2

Front

How is it easy for DNA to copy itself?

Back

DNA molecules have base pair structure.

Card 3

Front

What is the 1st step of DNA replication?

Back

Preview of the front of card 3

Card 4

Front

What is the 2nd step of DNA replication?

Back

Preview of the front of card 4

Card 5

Front

What is the 3rd step of DNA replication?

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 Biological molecules, organic chemistry and biochemistry resources »