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NEETZoologyMolecular Basis of Inheritance

Match List I with List II regarding a transcription unit in DNA. List I List II A. Promoter I. Located towards 3' end of the coding strand B. Terminator II. Has 3' 5' polarity C. Template strand III. Located towards 5' end of the coding strand D. Coding strand IV. Has 5' 3' polarity Choose the correct answer from the options given below:

Options

  1. AA-I, B-III, C-II, D-IV
  2. BA-III, B-I, C-IV, D-II
  3. CA-III, B-I, C-II, D-IV
  4. DA-I, B-III, C-IV, D-II

Correct answer

C. A-III, B-I, C-II, D-IV

Step-by-step solution

In a transcription unit, all reference points are defined with respect to the coding strand. The promoter is located towards the 5' end (upstream) of the coding strand. The terminator is located towards the 3' end (downstream) of the coding strand. The DNA-dependent RNA polymerase catalyzes polymerization in only one direction, i.e., 5' 3'. Therefore, the strand that has the polarity 3' 5' acts as a template, and is called the template strand. The other strand, which has the polarity 5' 3' and the sequence same as

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