Question

Which statement is correct?

(A) Degeneracy of code is related to third member of codon

(B) Single codon, codes for more than one amino acid

(C) In codon first two bases are more specific

(D) In codons third base is wobble

(E) code is universal

• A.
  A,B,C,D,E
• B.
  A, B, D
• C.
  A., C, D
• D.
  A, C, D, E

Answer 1

The correct option is B

A, B, D
All the statements are correct except for (B) because, the genetic code expresses in a way that 64 Codons constitute it, as it occurs in triplets.

According to the genetic code, three bases must be employed to encode the 20 standard amino acids used by living cells to build proteins. With four different nucleotides, a code of 2 nucleotides would allow for only a maximum of 42 = 16 amino acids. A code of 3 nucleotides could code for a maximum of 43 = 64 amino acids.

Codon degeneracy means that the genetic code is degenerate. It means that there is more than one codon that specifies the single amino acid. The phenomenon in which several of the amino acids, each coded by more than one codon is called codon degeneracy.

There are more than one codon for one amino acid. Only the first two bases of the codon have a precise pairing with the bases of the anticodon of tRNA, while the pairing between the third bases of codon and anticodon may wobble (wobble means to sway or move unsteadily).