Molecular Basis Of Inheritance Question 59
Question: A DNA molecule in which both strands have radioactive thymidine is allowed to duplicate in an environment containing non-radioactive thymidine. What will be the correct number of DNA molecules that contain some radioactive thymidine after three duplications [AIIMS 1980; DPMT 1993]
Options:
A) There will be four such molecules
B) There will be eight such molecules
C) There will be only one such molecule
D) There will be two such molecules
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Answer:
Correct Answer: D
Solution:
Because of semiconservative method of DNA replication only 2 molecules of DNA will have some radioactive thymidine.
BETA
