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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 codes for stop signal?
  • A
    UAA
  • B
    UAG
  • C
    UGA
  • D
    All of the above
✓

Answer

  1. All of the above

Explanation:

Termination of chain growth in protein synthesis is brought about by UAA, UAG, UGA. The three stop codons have been given names- UAG is amber, UGA is opal, and UAA is ochre. Stop codons are also called "termination" or "nonsense" codons. They signal release of the nascent polypeptide from the ribosome because there is no cognate tRNA that has anticodons complementary to these stop signals, and so a release factor binds to the ribosome instead.

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