Practise IB Biology HL 1.1.2 by analysing isotope evidence and distinguishing competing DNA-replication models.
The confirmation of DNA as the genetic material, together with the elucidation of its structure by Crick and Watson, had a profound effect on modern biology.
Outline the reason that DNA replication is described as semi-conservative.
a. replication is forming new DNA/strands from existing DNA/strands;
b. nucleotides added to exposed bases/to exposed strand/to bases on the template strand;
c. complementary base pairing (between free nucleotides and template/existing strands);
d. both strands/lagging and leading strands of the (parent) DNA act as templates/OWTTE;
e. one newly synthesized strand and one original/conserved strand (in daughter molecules);
c. Reject base pairs added
rather than bases.
3 max