A section of deoxyribonucleic acid (DNA) contains the following sequence of bases.The number of amino acids that the given section of DNA can code is
Correct answer: B. 4
- A. 3
- B. 4
- C. 6
- D. 12
Explanation
The section of DNA mentioned in the question can code for amino acids based on groups of three nucleotide bases, known as codons. Each codon corresponds to one amino acid. Given a sequence of 12 DNA bases, it can be divided into 4 groups of three bases each, which means it can code for 4 amino acids.Option B is correct because it recognizes that a total of four codons can be derived from the 12 bases, resulting in four amino acids. Option A is incorrect as it underestimates the number of codons. Option C is incorrect as it overestimates the number of codons. Option D is incorrect as it implies that each base codes for an amino acid, which is not the case.
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About Structure of DNA
DNA structure includes nucleotides made of deoxyribose, phosphate and nitrogenous bases, arranged in two antiparallel polynucleotide strands. Questions cover the double helix, phosphodiester and hydrogen bonds, complementary base pairing between adenine and thymine and between guanine and cytosine, and the significance of major and minor grooves.
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