NEET 2003 · Class 12

Molecular Basis of Inheritance

In the genetic code dictionary, how many codons are used to code for all the 20 essential aminoacids?

  1. (A)20
  2. (B)64
  3. (C)61
  4. (D)60

The NCERT line that answers it

Verbatim line

61 codons code for amino acids and 3 codons do not code for any amino acids, hence they function as stop codons.

Chapter
Molecular Basis of Inheritance
Section
5.6 GENETIC CODE
Page
17
Words matched
22 of 22

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states '61 codons code for amino acids', which directly and conclusively answers the MCQ about how many codons code for the 20 essential amino acids.

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