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Question

Which of the following statements is true for protein synthesis (translation)?
  1. The third base of the codon is less specific
  2. Every tRNA has more than one amino acid attachment
  3. Amino acids are directly by mRNA
  4. Only one codon codes for an amino acid

A
Amino acids are directly by mRNA
B
Only one codon codes for an amino acid
C
The third base of the codon is less specific
D
Every tRNA has more than one amino acid attachment
Solution
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A code determines the order of joining of amino acid residues The code is in the form of triplets known as codons.
Out of three bases in a codon, the first two bases are specific to a particular amino acid.
The third base of the codon is less specific.
Thus, the statement (B) is correct.

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Similar Questions
Q1
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
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Q2
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 codons, first two bases are more specific.
(D) In codons, third base is wobble.
(E) Code is universal.
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Q3
Choose the correct answer from the alternatives given :
Read the following statements.
(i) One codon codes for only one amino acid.
(ii) Some amino acids are coded by more than one codon.
(iii) The, sequence of triplet nitrogenous bases in DNA or mRNA corresponds to the amino acid sequence in the polypeptide chain.
Give suitable terms for the characteristics of genetic code as per the above statements.
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Q4
Some amino acids are coded by more than one codon as the code is

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Q5
Which one of the following triplet codes, is correctly matched with its specificity for an amino acid in protein synthesis or as 'start' or 'stop' codon?
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