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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
Which one of the following group of codons is called as degenerate codons ?
  • ✓
    $UAA,\, UAG$ and $UGA$
  • B
    $GUA, \,GUG, \,GCA,\, GCG$ and $GAA$
  • C
    $UUC, \,UUG,\, CCU,\, CAA$ and $CUG$
  • D
    $UUA,\,UUG, \,CUU, \,CUC,\, CUA$ and $CUG$
✓

Answer

Correct option: A.
$UAA,\, UAG$ and $UGA$
a
Degenerate codons (also called as non - sense codons or terminator codons) do not code for any amino acids. Three types of degenerate codons are $UAG$ (amber), $UAA$ (ochre) and $UGA$ (opal).

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