Home › NEET UG › Biology › Molecular Basis of Inheritance › A double-stranded DNA contains 20% cytosine. Wha…
A double-stranded DNA contains 20% cytosine. What percentage of adenine is present?
A{'text': '30%', 'label': 'A'}
B{'text': '20%', 'label': 'B'}
C{'text': '40%', 'label': 'C'}
D{'text': '60%', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': '30%', 'label': 'A'}
By Chargaff's rule, %C = %G = 20%, so C + G = 40%. Therefore A + T = 60%, and A = T = 30%.
Related questions
In eukaryotes, primary mRNA transcript becomes mature mRNA afterThe 'one gene - one polypeptide' concept was proposed byIn prokaryotes, the small ribosomal subunit recognises the mRNA initiation site via theIn humans, the percentage of A in a DNA sample is 30 %. By Chargaff's rule, the percentageTranscription differs from replication in that itThe genetic code is described as degenerate becauseOkazaki fragments are formed on theDuring DNA replication, the enzyme that unwinds the double helix is