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NEET 2023
Exam
NEET
Year
2023
Subject
Zoology
Chapter
Molecular Basis of Inheritance

NEET 2023 · Zoology · Molecular Basis of Inheritance

Which of the following is the sequence on corresponding coding...

Which of the following is the sequence on corresponding coding strand, if the sequence on mRNA formed is as follows

5' AUCGAUCGAUCGAUCGAUCGAUCGAUCG '3

Options

  1. A3' ATCGATCGATCGATCGATCGATCGATCG 5'
  2. B5' UAGCUAGCUAGCUAGCUAGCUAGC UAGC 3'
  3. C3' UAGCUAGCUAGCUAGCUAGCUAGCUAGC 5'
  4. D5' ATCGATCGATCGATCGATCGATCGATCG 3'

Correct answer

D. 5' ATCGATCGATCGATCGATCGATCGATCG 3'

Step-by-step solution

During transcription, the template strand has an orientation of 3' (promoter side) to 5' (terminator side). The RNA is synthesised in 5'-3' direction by RNA polymerase. The coding strand is complementary to template strand and thus have the same sequence like that of newly formed RNA (except for U, there would be T). Therefore, the coding strand sequence would be

5' ATCGATCGATCGATCGATCGATCGATCG 3'

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