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NEETZoologyMolecular Basis of Inheritance

A stretch of DNA has the following sequence on its template strand: 3^ -TAC GCA TCG- 5^ What will be the sequence and polarity of the corresponding tRNA anticodons that will bind to the mRNA transcribed from this stretch during translation?

Options

  1. A3^ -UAC GCA UCG- 5^
  2. B5^ -AUG CGU AGC- 3^
  3. C5^ -ATG CGT AGC- 3^
  4. D3^ -TAC GCA TCG- 5^

Correct answer

A. 3^ -UAC GCA UCG- 5^

Step-by-step solution

During transcription, the mRNA is synthesized complementary and antiparallel to the DNA template strand. DNA template strand: 3^ -TAC GCA TCG- 5^ mRNA sequence: 5^ -AUG CGU AGC- 3^ During translation, tRNA anticodons pair with the mRNA codons in a complementary and antiparallel manner. mRNA sequence: 5^ -AUG CGU AGC- 3^ tRNA anticodons: 3^ -UAC GCA UCG- 5^ A useful shortcut is that the tRNA anticodon sequence is identical to the DNA template strand in polarity and sequence, except that thymine (T) is replaced by ur

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