(D) $rRNA$ (ribosomal $RNA$) is the most abundant of all types of $RNA$ $(70-80\%)$. Hence,it is present in the highest amount in an animal cell. The

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(D) $rRNA$ (ribosomal $RNA$) is the most abundant of all types of $RNA$ $(70-80\%)$. Hence,it is present in the highest amount in an animal cell. The percentage of $tRNA$ is approximately $15\%$,and $mRNA$ is approximately $2-5\%$. $miRNA$ (micro $RNA$) are short $21-22 \ bp$ long $RNA$ molecules that regulate gene expression by causing the degradation of specific $mRNA$ molecules.

Class 12 Biology Molecular Basis of Inheritance The DNA

Medium

Which of the following $RNAs$ should be most abundant in an animal cell?

NEET 2017 All NEET

A
$tRNA$
B
$mRNA$
C
$miRNA$
D
$rRNA$

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Class 12

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Chapter

Molecular Basis of Inheritance

Subtopic

The DNA

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What is the molecular formula of the sugar present in the structure of $DNA$?

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Match the following columns $:-$

Column-$I$ Column-$II$

$(a)$ $\phi \times 174$ bacteriophage $(i)$ $48502 \ \text{b.p}$

$(b)$ Human (diploid) $(ii)$ $5386$ bases

$(c)$ $E. coli$ $(iii)$ $6.6 \times 10^9 \ \text{b.p}$

$(d)$ $\lambda$-phage $(iv)$ $4.6 \times 10^6 \ \text{b.p}$

Column-$I$	Column-$II$
$(a)$ $\phi \times 174$ bacteriophage	$(i)$ $48502 \ \text{b.p}$
$(b)$ Human (diploid)	$(ii)$ $5386$ bases
$(c)$ $E. coli$	$(iii)$ $6.6 \times 10^9 \ \text{b.p}$
$(d)$ $\lambda$-phage	$(iv)$ $4.6 \times 10^6 \ \text{b.p}$