Multiple Choice
Bacteria are grown in a medium containing 15NH4Cl for a number of generations so that all of the DNA is made of fully "heavy" DNA.The bacteria are moved to a new medium and grown in 15NH4Cl so that all new DNA will be "light".If replication were conservative,what would the DNA look like after two generation times.
A) All of the DNA is made of 2 "light" strands.
B) Half of the DNA is made of 2 "light" strands and half of the DNA is made of 1 "light" strand and 1 "heavy" strand.
C) All of the DNA is made of 1 "heavy" strand and 1 "light" strand.
D) Each strand is made of a mixture of "heavy" and "light" DNA with each strand being between 75% and 100% "light".
E) 75% of the DNA is made of 2 "light" strands and 25% of the DNA is made of 2 "heavy" strands.
Correct Answer:
Verified
Correct Answer:
Verified
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