If a hybrid DNA (^{14}N-^{15}N) is allowed to | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Initially,the $DNA$ is hybrid $(^{14}N-^{15}N)$.After the first replication in a medium with $^{15}N$: Two $DNA$ molecules are formed,one hybrid $

Vedclass · Accepted Answer

$0:3:1$

Vedclass · Answer

(D) Initially,the $DNA$ is hybrid $(^{14}N-^{15}N)$.After the first replication in a medium with $^{15}N$: Two $DNA$ molecules are formed,one hybrid $(^{14}N-^{15}N)$ and one heavy $(^{15}N-^{15}N)$.After the second replication: $A$ total of four $DNA$ molecules are formed.The hybrid $(^{14}N-^{15}N)$ molecule produces one hybrid $(^{14}N-^{15}N)$ and one heavy $(^{15}N-^{15}N)$ molecule.The heavy $(^{15}N-^{15}N)$ molecule produces two heavy $(^{15}N-^{15}N)$ molecules.Thus,the final composition is $0$ light,$3$ heavy,and $1$ hybrid $DNA$ molecules.Therefore,the correct proportion is $0:3:1$.

If a hybrid $DNA$ $(^{14}N-^{15}N)$ is allowed to undergo replication twice in a medium containing nucleotides with $^{15}N$ base,then what proportion of light,heavy,and hybrid $DNA$ will be obtained respectively?

Similar Questions

At what time intervals did Meselson and Stahl take samples after transferring the bacteria to a $^{14}NH_{4}Cl$ medium?

On which template strand of $DNA$ does continuous replication occur?

$A$ bacterium containing fully radioactive $DNA$ is allowed to replicate in a non-radioactive medium for two generations. What percentage of bacteria should contain radioactive $DNA$ (in $\%$)?

If a normal $DNA$ molecule replicates in an $N^{15}$ medium for consecutive generations,what is the percentage of light $DNA$ in the $4^{th}$ generation (in $\%$)?

Vedclass Test Series

Exam Paper Generator

Online Exam Module