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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance1 Mark
MCQ
Which of the following statement is not true for genetic code?
  • ✓
    A codon in $\text{mRNA}$ is read in a non$-$contiguous fashion.
  • B
    It is nearly universal.
  • C
    It is degenerate.
  • D
    It is unambiguous.
✓

Answer

Correct option: A.
A codon in $\text{mRNA}$ is read in a non$-$contiguous fashion.
  1. Codon in $\text{mRNA}$ consists of three nucleotides and is read in a contiguous manner.
  2. Genetic code is same in every organism with some exceptions. Hence, it is nearly universal.
  3. Genetic code is degenerate as more than one codon may code for an amino acid.
  4. Genetic code is unambiguous as a particular codon will always code for the same amino acid

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