watson and cricks model

Question 1

Watson and Crick were two scientists who worked together to confirm the

Answer 1

double-helix structure of DNA in 1953

Question 2

Watson and Crick also came up with a model by which DNA might be replicated:
This theory was called semi-conservative DNA replication
The theory is based upon the

Answer 2

specific hydrogen bonding between pairs of nitrogenous bases (A+T and C+G) being used during replication to conserve the genetic sequence

Question 3

However, this was just a theory, another theory suggested DNA replicated ‘conservatively’
The theory of conservative DNA replication suggested that the

Answer 3

strands of the original DNA molecule would stay together, and the new, replicated DNA molecule would be made out of two brand new strands

Question 4

Watson and Crick’s theory of semi-conservative DNA replication was later proved to be correct by the work of two other scientists, Meselson and Stahl
They used //////..

Answer 4

bacteria and two nitrogen isotopes, a heavy form (15N) and the normal, lighter form (14N), to prove this