Q. Semi conservative replication of DNA was first demonstrated in
A) $Drosophila\ melanogaster$
B) $Escherichia\ coli$
C) $Streptococcus\ pneumoniae$
D) $salmonella\ typhimurium$
Explanation
Semi conservative replication of DNA was first demonstrated in $E.\ coli$. According to the semi conservative model proposed by Watson and Crick, each strand of the two double helices formed would have one old and one new strand. The semi conservative nature of DNA replication was proved by the experiment of Meselson and Stahl (1958).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.