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STD 12 - 5. molecular basis of inheritance — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 5. molecular basis of inheritance1 Mark
MCQ
What is not true for genetic code?
  • A
    It is nearly universal.
  • B
    It is degenerate.
  • C
    It is unambiguous.
  • ✓
    A codon in $mRNA$ is read in a non­ contiguous fashion.
✓

Answer

Correct option: D.
A codon in $mRNA$ is read in a non­ contiguous fashion.
d
(d) : The relationship between the sequence of amino acids in a polypeptide and nucleotide sequence of $DNA $ or $mRNA$ is called genetic code. The genetic code is continuous and does not possess pause after the triplets. So a codon in $mRNA$ is a non­contiguous fashion. If a nucleotide is deleted or added, the whole genetic code will read differently.

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