Match Column-I with Column-II: Column-I | vedclass

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(C) The $lac$ operon model explains gene regulation in prokaryotes:$1$. $(i)$ Operator site $(d)$: The operator is the $DNA$ sequence where the repres

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$i-d, ii-c, iii-a, iv-b$

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(C) The $lac$ operon model explains gene regulation in prokaryotes:$1$. $(i)$ Operator site $(d)$: The operator is the $DNA$ sequence where the repressor protein binds to prevent transcription.$2$. $(ii)$ Promoter site $(c)$: The promoter is the $DNA$ sequence where $RNA$ polymerase binds to initiate transcription.$3$. $(iii)$ Structural gene $(a)$: These genes (like $lacZ, lacY, lacA$) code for the enzymes (proteins) required for metabolic pathways.$4$. $(iv)$ Regulator gene $(b)$: The regulator gene (or $i$-gene) codes for the repressor protein,which regulates the expression of the operon.Therefore,the correct matching is $(i-d, ii-c, iii-a, iv-b)$.

Column-$I$	Column-$II$
$(i)$ Operator site	$(a)$ Codes for enzyme (protein)
$(ii)$ Promoter site	$(b)$ Codes for repressor
$(iii)$ Structural gene	$(c)$ Binding site for $RNA$ polymerase
$(iv)$ Regulator gene	$(d)$ Binding site for repressor

Match Column-$I$ with Column-$II$:

Column-$I$ Column-$II$

$(i)$ Operator site $(a)$ Codes for enzyme (protein)

$(ii)$ Promoter site $(b)$ Codes for repressor

$(iii)$ Structural gene $(c)$ Binding site for $RNA$ polymerase

$(iv)$ Regulator gene $(d)$ Binding site for repressor

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Match Column-$I$ with Column-$II$: Column-$I$ Column-$II$ $(i)$ Operator site $(a)$ Codes for enzyme (protein) $(ii)$ Promoter site $(b)$ Codes for repressor $(iii)$ Structural gene $(c)$ Binding site for $RNA$ polymerase $(iv)$ Regulator gene $(d)$ Binding site for repressor