Q.

Given below are two statements. 

Statement I : Twenty types of amino acids are coded by sixty one types of codons.

Statement II : Each codon codes for a specific amino acid.

In light of the above statements, choose the correct answer from the options given below. 

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a

Statement I is incorrect but statement II is correct.

b

Both statement I and statement II are incorrect. 

c

Statement I is correct but statement II is incorrect.

d

Both statement I and statement II are correct. 

answer is C.

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Detailed Solution

Statement I is true. Twenty types of amino acids are indeed coded by sixty-one types of codons. This is because the genetic code is degenerate, meaning that multiple codons can code for the same amino acid. While there are twenty different amino acids, there are sixty-one different codons (including the start codon AUG but not the three stop codons) that specify these amino acids.
Statement II is also correct. Each codon in the genetic code indeed codes for a specific amino acid. The sequence of three nucleotides in a codon determines which amino acid will be incorporated into a growing polypeptide chain during protein synthesis. Therefore, each codon is associated with a specific amino acid.

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Given below are two statements. Statement I : Twenty types of amino acids are coded by sixty one types of codons.Statement II : Each codon codes for a specific amino acid.In light of the above statements, choose the correct answer from the options given below.