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5.Molecular Basis of Inheritance
medium
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
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
(AIIMS-1980)
Solution
(d)Because of semiconservative method of $DNA$ replication only $2$ molecules of $DNA$ will have some radioactive thymidine.
Standard 12
Biology
