ACT Science Practice Question #1530 (Medium (29)) | Test Citadel
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ACT Science Difficulty: Medium (29)

Digital ACT Science Practice Question #1530

Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.

A PCR assay amplified a 500 bp target gene from 1 initial copy: - Cycle 10: ~1,000 copies - Cycle 20: ~1,000,000 copies - Cycle 30: ~1,000,000,000 copies This exponential amplification demonstrates that during each cycle of PCR, target DNA copies:
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PCR doubles DNA each round: 2^n.

Masterclass Solution & Distractor Trap Analysis

PCR doubles target DNA in each cycle: 2^10 ~= 1,024; 2^20 ~= 1.05 x 10^6; 2^30 ~= 1.07 x 10^9....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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