Topic2 Structure And Function Of Dna

Question 1

Replication of DNA

Answer 1

1. Dna unwinds
2. Primer needed to start replication
3. DNA polymerase needed
4. Adds complimentary nucleotides to the deoxyribose end of the lead chain
5. This strand is replicated continuously and other strand replicated in fragments

Question 2

Where do cells store their genetic information

Answer 2

In the base sequence of dna

Question 3

Sugar phosphate backbone

Answer 3

Made from deoxyribose sugar and phosphate

Question 4

Chromosomes consist of

Answer 4

Dna that is tightly coiled around proteins

So can all fit into the nucleus

Question 5

Structure of DNA

Answer 5

1. Consists of strands of nucleotides
2. A nucleotide is made up of deoxyribose sugar, a phosphate and a base
3. Nucleotides bond to for a sugar phosphate backbone
4. Bases paired
5. Hydrogen bonds between bases
6. Double stranded helix
7. Strands are antiparallel, 3’&5’