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(C) mutation at a genetic locus alters the nucleotide sequence of the $DNA$. This change is transcribed into an altered $mRNA$ sequence. The abnormal

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Protein structure

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(C) mutation at a genetic locus alters the nucleotide sequence of the $DNA$. This change is transcribed into an altered $mRNA$ sequence. The abnormal $mRNA$ sequence leads to the incorporation of different amino acids during translation,resulting in a change in the primary structure of the protein. Since proteins (enzymes/structural proteins) determine the phenotype of an organism,a change in protein structure leads to a change in the organism's character.

Column-$I$	Column-$II$
$(a)$ Splicing	$(1)$ Lac Operon
$(b)$ Okazaki fragments	$(2)$ Lagging strands
$(c)$ Jacob and Monod	$(3)$ Lactose
$(d)$ Inducer	$(4)$ Removal of introns

After a mutation at a genetic locus,the character of an organism changes due to the change in:

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$A$ genetic mutation that does not result in a phenotypic expression is called a .....

Assertion $(A):$ The split gene arrangement represents probably an ancient feature of the genome.
Reason $(R):$ $\text{hnRNA}$ undergoes additional processing called as capping and tailing.
Choose the correct option.

Define/Explain the following:
$1.$ Nucleotide
$2.$ Central Dogma

Match the columns.
Column-$I$ Column-$II$
$(a)$ Splicing $(1)$ Lac Operon
$(b)$ Okazaki fragments $(2)$ Lagging strands
$(c)$ Jacob and Monod $(3)$ Lactose
$(d)$ Inducer $(4)$ Removal of introns

Which of the following is not a correct statement regarding $\text{RNA}$?

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