2.7 DNA replication, transcription and translation

Question 1

explain how DNA replication is semi-conservative

Answer 1

DNA replication is semi-conservative because when a new double-stranded DNA molecule is formed:

-one strand is from the original template molecule (conserved)

-one strand is newly synthesized (not conserved)

Question 2

outline how the results of Medellin Stahl experiment supported semi conservative DNA replication

Answer 2

.

after one divisions all molecules contained both 15N and 14N

after two divisions, some molecules contained both, while others only contained 14N