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Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular Basis of Inheritance1 Mark
MCQ
A codon in mRNA has:
  • A
    3 bases
  • B
    2 bases
  • C
    1 base
  • D
    Number of bases vary
✓

Answer

  1. 3 bases

Explanation:

The sequence of amino acids in proteins depends on the sequence of nucleotides in DNA.

The DNA produces mRNA molecules through the process of transcription. The mRNA is transported to the cytoplasm where it is translated into protein.

A sequence of three nucleotides in mRNA specifies a particular amino acid in a protein chain.

Hence, the genetic codon is a triplet.

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