What is the mRNA strand for the DNA sequence TCG ATT CGA CGC?

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Multiple Choice

What is the mRNA strand for the DNA sequence TCG ATT CGA CGC?

Explanation:
Transcription makes an mRNA sequence that is complementary to the DNA template strand, with uracil replacing thymine. The given DNA is the template strand, read 3' to 5'. Map each base: T pairs with A, C with G, G with C, A with U. Doing this across TCG ATT CGA CGC yields AGC UAA GCU GCG in the correct 5' to 3' direction. The middle segment ATT becomes UAA in mRNA, which is a stop codon in translation but doesn’t affect transcription. The other sequence options don’t follow the required base-pairing for this template strand.

Transcription makes an mRNA sequence that is complementary to the DNA template strand, with uracil replacing thymine. The given DNA is the template strand, read 3' to 5'. Map each base: T pairs with A, C with G, G with C, A with U. Doing this across TCG ATT CGA CGC yields AGC UAA GCU GCG in the correct 5' to 3' direction. The middle segment ATT becomes UAA in mRNA, which is a stop codon in translation but doesn’t affect transcription. The other sequence options don’t follow the required base-pairing for this template strand.

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