The function of DNA

HideShow resource information
  • Created by: zoolouise
  • Created on: 06-04-16 17:29
Where is DNA found in eukaryotic cells?
It's found in the nuclei, it's wound up so it can fit. It's wound around proteins called histone and these help to support the DNA.
1 of 11
Where is DNA found in prokaryotic cells?
It's found loose in the cytoplasm and is short and circular. It isn't wound around histones.
2 of 11
Where else is DNA found?
In mitochondria, chloroplasts and some viruses.
3 of 11
What are the two functions of DNA?
Replication and protein synthesis.
4 of 11
What must happen for cells to divide?
Chromosomes must copy themselves and this means that each daughter cell recieves an exact copy of the genetic information which is needed.
5 of 11
What is the copying of DNA called?
The copying of DNA is called replication and it takes place in the nucleus during interphase.
6 of 11
What is conservative replication?
The parental double helix remains intact, i.e it's conserved and a whole new double helix is made
7 of 11
What is semi-conservative replication?
The parental double helix separates into two strands, which then act as a template for the synthesis of new strands (This is the what actually occurs)
8 of 11
What is dispersive replication?
This is where the two new double helices contain fragments from both strands of the parental double helix
9 of 11
What experiment proved which type of DNA replication takes place?
The Meselson-Stahl experiment
10 of 11
What did Watson and Crick realise?
They realised that due to the complementary base pairs, if DNA strands separated they would each make another complementary strand. This results in two new but identical molecules forming, each with one old strand and one newly synthesised strand. (s
11 of 11

Other cards in this set

Card 2

Front

Where is DNA found in prokaryotic cells?

Back

It's found loose in the cytoplasm and is short and circular. It isn't wound around histones.

Card 3

Front

Where else is DNA found?

Back

Preview of the front of card 3

Card 4

Front

What are the two functions of DNA?

Back

Preview of the front of card 4

Card 5

Front

What must happen for cells to divide?

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 »