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Molecular Basis of Inheritance question

2021 · Q88
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Molecular Basis of Inheritance question

2021 · Q88

NEETBiologyMolecular Basis of InheritanceMCQ+4 / −1
Statement I : The codon 'AUG' codes for methionine and phenylalanine.

Statement II : 'AAA' and 'AAG' both codons code for the amino acid lysine.

In the light of the above statements, choose the correct answer from the options given below.
  1. A
    Statement I is incorrect but Statement II is true
  2. B
    Both Statement I and Statement II are true
  3. C
    Both Statement I and Statement II are false
  4. D
    Statement I is correct but Statement II is false
View written solutionFree

Correct answer: A

∙\bullet∙ The codon AUG only codes for methionine. As the codons are universal. From bacteria to mammals AUG only codes for methionine.

∴\therefore∴ Statement I is false.

∙\bullet∙ Some amino acids are coded by more than one codon, hence the code is degenerate. AAA and AAG both codons code for the amino acid lysine.

∴\therefore∴ Statement II is true.

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