Problem:
In the Meselson-Stahl experiment, 15N-labeled cells were shifted to 14N medium at what is designated as generation 0. In subsequent divisions DNA molecules can result that are N15-N15, N15-N14 or N14-N14.
Required:
Question 1: For the conservative model of replication, what proportion of 14N-14N would you expect to find after three replication cycle?
Question 2: For the conservative model of replication, what proportion of 14N-14N would you expect to find after one replication cycle?
Question 3: For the semi-conservative model of replication, what proportion of 14N-14N would you expect to find after one replication cycle?
Question 4: For the semi-conservative model of replication, what proportion of 14N-14N would you expect to find after three replication cycle?
a.0%
b.12.5%
c.50%
d.87.5%
e.100%
f. 25% g. 75%