alleryDuring transcription, mRNA is synthesised using how many of the two strands of a DNA molecule?
ABoth strands
BOnly one strand
CNeither strand
DHalf of each strand
Answer & Solution
Correct answer: B. Only one strand
1. Transcription is the production of mRNA based on the nucleotide sequence of DNA.
2. Only one of the two DNA strands is used as the template.
3. The mRNA sequence formed is complementary to that single strand.
4. Hence only one strand is used.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 1 "Heredity and Evolution", p.10_
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