Which property of DNA double helix led Watson and Crick to hypothesise semiconservative mode of DNA

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5.Molecular Basis of Inheritance

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Which property of $DNA$ double helix led Watson and Crick to hypothesise semiconservative mode of $DNA$ replication? Explain.

Option A

Option B

Option C

Option D

Solution

Watson and Crick observed that the two strands of $DNA$ are anti-parallel and complementary to each other with respect to their base sequences. This type of arrangement in $DNA$ molecule led to the hypothesis that $DNA$ replication is semiconservative. It means that the double stranded $DNA$ molecule separates and then, each of the separated strand acts as a template for the synthesis of a new complementary strand. As a result, each $DNA$ molecule would have one parental strand and a newly synthesized daughter strand.

since only one parental strand is conserved in each daughter molecule, it is known as semi-conservative mode of replication.

Standard 12

Biology

Which of the following is not correct for molecule acting as genetic material ?

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Given below are two statements:

Statement $I:$ $RNA$ mutates at a faster rate.

Statement $II$: Viruses having RNA genome and shorter life span mutate and evolve faster.

In the light of the above statements, choose the correct answer from the options given below:

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(NEET-2023)

$A :$ DNase can inhibit the process of transformation.
$R :$ Transformation is absorption of $DNA$ segment from the surrounding medium by a living bacterium

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Give an account of Hershey and Chase experiment. What did it conclusively prove?If both $DNA$ and proteins contained phosphorus and sulphur do you think the result would have been the same ?

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………. enzymes are used by Avery, Macleod and Mcarty in their experiment

medium

Which property of $DNA$ double helix led Watson and Crick to hypothesise semiconservative mode of $DNA$ replication? Explain.

Solution

Similar Questions

Which of the following is not correct for molecule acting as genetic material ?

Given below are two statements: Statement $I:$ $RNA$ mutates at a faster rate. Statement $II$: Viruses having RNA genome and shorter life span mutate and evolve faster. In the light of the above statements, choose the correct answer from the options given below:

$A :$ DNase can inhibit the process of transformation. $R :$ Transformation is absorption of $DNA$ segment from the surrounding medium by a living bacterium

Give an account of Hershey and Chase experiment. What did it conclusively prove?If both $DNA$ and proteins contained phosphorus and sulphur do you think the result would have been the same ?

………. enzymes are used by Avery, Macleod and Mcarty in their experiment

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Given below are two statements:

Statement $I:$ $RNA$ mutates at a faster rate.

Statement $II$: Viruses having RNA genome and shorter life span mutate and evolve faster.

In the light of the above statements, choose the correct answer from the options given below:

$A :$ DNase can inhibit the process of transformation.
$R :$ Transformation is absorption of $DNA$ segment from the surrounding medium by a living bacterium