Multiple Choice
You decide to repeat the Meselson-Stahl experiment,except this time you plan to grow the E.coli cells on light 14N medium for many generations and then transfer them to heavy 15N medium and allow them to grow for 2 additional generations (2 rounds of DNA replication) .If the conservative model of DNA replication was correct,what is the expected distribution of DNA in the density gradient after two rounds of replication?
A) One band of intermediate density.
B) One band of light density.
C) One band of heavy density.
D) One band of light density and one band of heavy density.
E) One band of light density and one band of intermediate density.
Correct Answer:

Verified
Correct Answer:
Verified
Q58: The lagging strand is replicated with a
Q59: In Griffith's experiments,<br>A)mice infected with live nonvirulent
Q60: Who proposed that the structure of DNA
Q61: Endonucleases and exonucleases are enzymes that can
Q62: If a mutation produced helicase that was
Q63: Griffith,a British microbiologist,used bacteria and mice to
Q64: Because the two strands of a DNA
Q65: Viruses that attack bacteria are called<br>A)phages<br>B)proviruses<br>C)virulent<br>D)lytic
Q66: In DNA,a purine must always pair with
Q67: During replication,which enzyme unwinds the DNA double