(C) In $DNA$,the four nitrogenous bases are $Adenine$ $(A)$,$Guanine$ $(G)$,$Cytosine$ $(C)$,and $Thymine$ $(T)$.In $RNA$,$Thymine$ is replaced by $Ur

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(C) In $DNA$,the four nitrogenous bases are $Adenine$ $(A)$,$Guanine$ $(G)$,$Cytosine$ $(C)$,and $Thymine$ $(T)$.In $RNA$,$Thymine$ is replaced by $Uracil$ $(U)$.Therefore,$RNA$ contains $Adenine$,$Guanine$,$Cytosine$,and $Uracil$.

Class 12 Biology Molecular Basis of Inheritance RNA World

Easy

What is present in place of $Thymine$ in $RNA$?

A
Guanine
B
Adenine
C
Uracil
D
Water

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Class 12 Questions

Class 12

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Chapter

Molecular Basis of Inheritance

Subtopic

RNA World

Sugar found in $RNA$.

Easy

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Give scientific reasons: It is likely that $DNA$ evolved from $RNA$.

Medium

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How many main types of $RNA$ are there?

Easy

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$A$ - The process of splicing represents the dominance of $RNA$ world.
$R$ - The presence of introns is reminiscent of antiquity.

Medium

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The $A/U$ and $G/C$ ratio in $RNA$ is:

Medium

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What is present in place of $Thymine$ in $RNA$?

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Sugar found in $RNA$.

Give scientific reasons: It is likely that $DNA$ evolved from $RNA$.

How many main types of $RNA$ are there?

$A$ - The process of splicing represents the dominance of $RNA$ world.$R$ - The presence of introns is reminiscent of antiquity.

The $A/U$ and $G/C$ ratio in $RNA$ is:

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$A$ - The process of splicing represents the dominance of $RNA$ world.
$R$ - The presence of introns is reminiscent of antiquity.