Topic 2

Question 1

What kind of backbone does dna have ?

Answer 1

Sugar phosphate backbone

Question 2

What’s the complementary base pairing off Dna?

Answer 2

Adenine pairs with thymine and cytosine pairs with guanine

Question 3

What holds the two Dna strands together ?

Answer 3

(Weak)Hydrogen bonds

Question 4

Dna strands structure is described as ?

Answer 4

Anti parallel with deoxyribose and phosphate at 3’ and 5’ ends of each strand

Question 5

What do chromosomes consist of ?

Answer 5

Chromosome consist of tightly coiled dna and are packaged with associated proteins

Question 6

What’s the first stage of replication ?

Answer 6

Dna is unwound and unzipped to form two template strands

Question 7

What does DNA polymerase need to start replication ?

Answer 7

Primer

Question 8

Replication can only add complementary Dna nucleotides to what end of strand ?

Answer 8

Deoxyribose 3’ end of strand

Question 9

Replication results in one strand being ?

Answer 9

Replicated continuously

Question 10

And the other strand replicated in ?

Answer 10

Fragments which are joined together by ligase

Question 11

What’s does the structure of Dna involve ?

Answer 11

Nucleotide contain deoxyribose sugar ,phosphate and base