The Work of Meselson and Stahl

Multiple Choice

The work of Meselson and Stahl:

A) Showed that DNA replication semiconservative, which means that the parental double helix is conserved.
B) Used the radioisotope ³H-thymidine in conjunction with centrifugation to separate DNA on the basis of size
C) Showed that the DNA, after one round of replication, was of intermediate density thereby showing that the DNA molecules contained one parent strand and one new strand.
D) All of these
E) None of these