A DNA molecule in which both strands have rad | vedclass

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

Question

(D) $DNA$ replication is semiconservative,meaning each original strand serves as a template for a new strand.Initially,we have $1$ $DNA$ molecule with

Vedclass · Accepted Answer

There will be two such molecules

Vedclass · Answer

(D) $DNA$ replication is semiconservative,meaning each original strand serves as a template for a new strand.Initially,we have $1$ $DNA$ molecule with $2$ radioactive strands $(R-R)$.After the $1^{st}$ duplication: $2$ molecules are formed,each with $1$ radioactive and $1$ non-radioactive strand ($R-N$ and $R-N$).After the $2^{nd}$ duplication: $4$ molecules are formed. The $2$ radioactive strands from the previous step are distributed into $2$ separate molecules,while the other $2$ molecules consist entirely of non-radioactive strands $(R-N, N-N, N-N, R-N)$.After the $3^{rd}$ duplication: $8$ molecules are formed. The $2$ radioactive strands remain in $2$ separate molecules,while the remaining $6$ molecules are entirely non-radioactive.Therefore,only $2$ $DNA$ molecules will contain radioactive thymidine.

$A$ $DNA$ 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?

Similar Questions

The Nobel Prize was awarded to Kornberg and Ochoa for:

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

Which enzyme is responsible for the synthesis of small $RNA$ fragments during $DNA$ replication?

$DNA$ replication is semi-conservative as

What is the mode of $DNA$ replication in $E. coli$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module