CBSE 2026 · Region 5 · Set 1 · Q3 · 1 mark
A DNA molecule is $\displaystyle 160$ base pairs long. It has $\displaystyle 30 \%$ Guanine. How many Adenine bases are present in this DNA molecule ?
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 64$
Molecular Basis of InheritanceThe DNAApplymcqeasy
More from Molecular Basis of Inheritance
- Explain how the addition of lactose in the medium regulates the switching on of the lac operon in bacteria.2025 · asked 3×
- The type of bond represented by the dotted line '-----' in a schematic polynucleotide chain is:2024 · asked 3×
- Which of the options has correct identification of 'P', 'Q' and 'R' in the illustration of 'Central Dogma'…2024 · asked 3×
- Study the diagram given below and answer the questions that follows: Identify the structure shown in the…2025 · asked 3×
- What is a genetic code? Why did scientists feel the need to propose a genetic code? Genetic code is said to…2026 · asked 3×
- Assertion: Primary transcripts in eukaryotes are subjected to splicing to remove the introns. Reason (R):…2024 · asked 3×
- Given below is a heterogeneous RNA formed during Eukaryotic transcription: How many introns and exons…2025 · asked 3×
- Consider the given data of a hypothetical small portion of mRNA that codes for a functional polypeptide chain…2024 · asked 3×
CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.