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Which of the following statements are correct with reference to a transcription unit? I. A transcription unit in DNA is defined primarily by three regions: promoter, structural gene and terminator. II. The promoter is said to be located towards the 5'-end of the structural gene. III. The promoter is a DNA sequence that provides binding site for RNA polymerase. IV. The promoter defines the template and coding strands. V. The terminator is located towards the 3'-end of the coding strand and it defines the end of the process of transcription. Choose the CORRECT answer from the options given below:
A
I, II, III, IV and V
B
II, III, IV and V only
C
I, III, IV and V only
D
I, II, III and IV only
The answer is A.