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5.Molecular Basis of Inheritance
medium
A transcription unit in $DNA$ is defined primarily by the three regions in $DNA$ and these are with respect to upstream and down stream end;
A
Structural gene, Transposons, Operator gene
B
Inducer, Repressor, Structural gene
C
Promotor, Structural gene, Terminator
D
Repressor, Operator gene, Structural gene
(NEET-2024)
Solution
A transcription unit of $DNA$ is defined primarily by the three regions in the $DNA$:
($i$) A promoter
($ii$) The structural gene
($iii$) A terminator
The promoter is said to be located towards $5^{\prime}$-end (upstream) of the structural gene (the reference is made with respect to the polarity of coding strand)
The terminator is located towards $3^{\prime}$-end (downstream) of the coding strand.
Standard 12
Biology
