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NEETZoologyMolecular Basis of Inheritance

Given below are two lists based on a single base triplet on the template strand of DNA which is 5' CAT 3'. Note that the polarity is written as 5' to 3', so the template is read as 3' TAC 5'. List I List II A. Template strand (i) 5' AUG 3' B. Coding strand (ii) 3' UAC 5' C. mRNA codon (iii) 3' TAC 5' D. tRNA anticodon (iv) 5' ATG 3' Choose the correct answer from the options given below:

Options

  1. AA-(iii), B-(i), C-(iv), D-(ii)
  2. BA-(iv), B-(iii), C-(i), D-(ii)
  3. CA-(iii), B-(iv), C-(ii), D-(i)
  4. DA-(iii), B-(iv), C-(i), D-(ii)

Correct answer

D. A-(iii), B-(iv), C-(i), D-(ii)

Step-by-step solution

The template strand has 3' to 5' polarity. The given template triplet is 3' TAC 5'. The coding strand is complementary and antiparallel to the template strand. Therefore, its sequence is 5' ATG 3'. The mRNA is synthesized by RNA polymerase in the 5' to 3' direction, using the template strand. It is complementary to the template strand, with uracil (U) replacing thymine (T). Thus, the mRNA codon is 5' AUG 3'. The tRNA anticodon pairs with the mRNA codon in an antiparallel manner. Complementary to 5' AUG 3', the anti

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