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SAT Biology Subject Test Practice Questions

Category - Biology

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What is the corresponding mRNA sequence to the following DNA sequence AGTCCATGCACAAT?
  1. CTGAACTACACCG
  2. UCAGGUACGUGUUA
  3. TCUGGTUCGTGTTU
  4. TCAGGTACGTGTTA
  5. TAACACGTACCTGA
Explanation
Answer: B, UCAGGUACGUGUUA. Transcription is the process to produce RNA from the DNA template, with fixed base paring rules.

Key Takeaway: In transcription, A pairs with U, T with A, G with C, and C with G. RNA does not use thymine, so all other answers other than B can be immediately eliminated.
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