| $m-RNA$ | $t-RNA$ |
|---|---|
| $(1)$ It carries the genetic information for protein synthesis from the nucleus to the cytoplasm. | $(1)$ It binds to specific amino acids and transports them to the ribosome surface. |
| $(2)$ Numerous $m-RNA$ units are active in the cell at different times based on gene expression. | $(2)$ There are $61$ types of $t-RNA$ possible for transporting $20$ types of amino acids (corresponding to $61$ codons). |
| $(3)$ $m-RNA$ undergoes degradation after completing its function. | $(3)$ $t-RNA$ molecules are generally stable and do not undergo degradation easily. |
| $(4)$ The sequence of nucleotides in $m-RNA$ determines the sequence and position of amino acids in the protein structure. | $(4)$ Each $t-RNA$ carries a specific type of amino acid unit. |
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| Column $I$ | Column $II$ |
| $(a)$ $m-RNA$ | $(i)$ Found in ribosomes |
| $(b)$ $t-RNA$ | $(ii)$ Carries information from $DNA$ to the cytoplasm for protein synthesis |
| $(c)$ $r-RNA$ | $(iii)$ Contains $75$ nucleotides |
| $(d)$ $RNA$ | $(iv)$ $A$ polynucleotide chain containing ribose sugar and uracil base,existing in three types |
| List-$I$ | List-$II$ |
| $(a)$ Helicase | $(i)$ $DNA$-dependent $DNA$ synthesis |
| $(b)$ Ribonuclease | $(ii)$ Digestion of $RNA$ |
| $(c)$ Reverse transcriptase | $(iii)$ Breaking hydrogen bonds between $DNA$ strands |
| $(d)$ $DNA$ polymerase | $(iv)$ $RNA$-dependent $DNA$ synthesis |
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