AIIMS November 2011 – MCQ 2

If 4 nucleotide repeats code for a amino acid, what is maximum number of amino acids possible?
A. 16
B. 64
C. 4
D. 256

Correct answer : 256

A codon with 3 nucleotides can code for upto 64 amino acids, whereas a codon with 4 nucleotide repeats can code for upto 256 amino acids. For this to be possible, the stop codon should also code for an amino acid like the start codon coding for methionine.

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9 Comments
  1. sarvesh

    D

  2. S. Abhishek

    D. 256

  3. danish

    4 to the power 4=256

  4. Sarwat

    256

  5. Barun

    Ans 256

  6. sapna

    d

  7. priya

    256

  8. tanisha

    c. 4

  9. vonita

    64.. take cube of 4… coz.. 4 nucleotides when used in comboination of 3…gives 64… explained in trueman’s biology… which we studied in 12th…:))