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(C) The experiment described is the Meselson-Stahl experiment, which demonstrates the semi-conservative nature of $DNA$ replication.$E. coli$ divides

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$40$ minutes

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(C) The experiment described is the Meselson-Stahl experiment, which demonstrates the semi-conservative nature of $DNA$ replication.$E. coli$ divides every $20$ minutes.Initially, all $DNA$ is heavy $(^{15}N/^{15}N)$.After $20$ minutes (one generation), all $DNA$ is hybrid $(^{15}N/^{14}N)$.After $40$ minutes (two generations), the $DNA$ consists of $50\%$ hybrid $(^{15}N/^{14}N)$ and $50\%$ light $(^{14}N/^{14}N)$.Therefore, after $40$ minutes, the $DNA$ extracted will contain equal amounts of hybrid and light $DNA$.

Column - $I$	Column - $II$
$(a)$ Helicase	$(1)$ Joining of nucleotides
$(b)$ Gyrase	$(2)$ Opening of $DNA$
$(c)$ Primase	$(3)$ Unwinding of $DNA$
$(d)$ $DNA$ Polymerase $III$	$(4)$ $RNA$ Priming

For how long should bacteria be cultured in a $^{14}N$ medium after being transferred from a $^{15}N$ medium so that the extracted $DNA$ consists of equal amounts of hybrid $DNA$ and light $DNA$?

Similar Questions

$DNA$ polymerase enzyme is responsible for the synthesis of

Which enzyme catalyzes the process of reverse transcription?

Match the columns.
Column - $I$ Column - $II$
$(a)$ Helicase $(1)$ Joining of nucleotides
$(b)$ Gyrase $(2)$ Opening of $DNA$
$(c)$ Primase $(3)$ Unwinding of $DNA$
$(d)$ $DNA$ Polymerase $III$ $(4)$ $RNA$ Priming

Choose the correct option regarding the origin of replication $(ori)$.

The mode of $DNA$ replication in $E. coli$ is:

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