Distinguish between: $m-RNA$ and $t-RNA$.

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$m-RNA$ $t-RNA$
$(1)$ 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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Which of the following is an incorrect combination?

The given figure shows the structure of a nucleosome with its parts labelled as $A, B$ and $C$. Identify $A, B$ and $C$.

The information flow or central dogma of modern biology is:

Statement-$I$: The split gene arrangements represent probably an ancient feature of the genome.
Statement-$II$: Introns or intervening sequences do not appear in mature or processed $\text{RNA}$.

Select the $CORRECT$ statement from the following.

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