CAIE A-Level Biology AS 6.1.5 Semi Conservative Dna Replication Questions

1 DNA (double helix) unwinds ;
A uncoils I unzips R DNA strand unwinds

2 hydrogen bonds break between, base pairs / bases / strands ;

3 both strands used as templates ;

4 catalysed by / AW, DNA polymerase ;

5 ref. to (free) activated nucleotides / AW ;

6 complementary (DNA) nucleotides added;
R RNA nucleotides

A described in terms of complementary base pairing

7 step-by-step / sequentially / AW ;

8 idea that process continues, along whole DNA molecule ;

9 replication bubbles / described

or

ref. to Okazaki fragments ;

10 replication is semi-conservative / each newly formed molecule contains one original and one newly synthesised strand

11 AVP ;
e.g. ref. to repair / proofreading ref. to, helicase / ligase in correct context

Marking guidance: