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Observe the given diagram and find out t...

Observe the given diagram and find out the incorrect statement:

(I) Promoter: It can be defined as a DNA sequence that serves as the binding site for RNA polymerase.
(II) The binding site is located at the 5'-end (upstream) of the structural gene.
(III) Terminator is located towards 5'- end (downstream) of the coding strand.
(IV) The structural gene coding for a particular protein is flanked by the promoter and terminator.

A

(I), (II)

B

(II)

C

(III)

D

(III), (IV)

Text Solution

Verified by Experts

The correct Answer is:
C
A transcription unit has:
(1) Promoter: It can be defined as a DNA sequence that serves as the binding site for RNA polymerase. It is located at the 5end (upstream) of the structural gene. The presence of promoter region also defines the template and coding strands.
By switching its position with terminator, the definition of coding and template strands could be reversed.
(2) Terminator: Terminator is the region of the transcription unit that ends the process of transcription. It is located towards 3.-end (downstream) of the coding strand.
(3) Structural gene: The structural gene coding for a particular protein is flanked by the promoter and terminator.
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