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If a DNA strand reads ATGCTTGA, what sequence would appear on the complementary strand?

1. TACGAACT
2. TCCGAACT
3. TACGTACT
4. TACGTAGT

Correct answer: TACGAACT

Solution

Reading ATGCTTGA and pairing A-T, T-A, G-C, C-G gives the complementary strand TACGAACT.

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