MCQ
In genetic coding, triplet codons make possible 64 types of codons. If the genetic code was a doublet instead of a triplet codon, the number of types of codons possible would be:
  • A
    64 types of codons
  • B
    4 types of codons
  • C
    24 types of codonsa
  • D
    16 types of codons

Answer

  1. 16 types of codons

Explanation:

As we know that there are only four nucleotides namely deoxyadenosine, deoxyguanosine, deoxythymidine and deoxycytidine. Further, there are 20 essential amino acids that are to be encoded by these four nucleotides.

A triplet code could make a genetic code for 64 different combinations (4 × 4 × 4) genetic code. A code of single nucleotides would give only four amino acids to be translated. The doublet code would code for 16 amino acids (4 × 4).

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