ACT Science Practice Question #1481 (Medium (30)) | Test Citadel
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ACT Science Difficulty: Medium (30)

Digital ACT Science Practice Question #1481

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

A molecular biology lab ran restriction-digested DNA fragments on an agarose gel at 100 V for 60 minutes: - Fragment 1 (1,000 base pairs): Migration distance = 6.8 cm - Fragment 2 (2,500 base pairs): Migration distance = 4.2 cm - Fragment 3 (5,000 base pairs): Migration distance = 2.5 cm - Fragment 4 (10,000 base pairs): Migration distance = 1.1 cm An unknown DNA fragment migrated a distance of 3.4 cm under identical conditions. The estimated size of this unknown fragment is:
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Socratic AI Engine Step-by-Step Derivation
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3.4 cm is between 4.2 cm and 2.5 cm -> between 2,500 bp and 5,000 bp.

Masterclass Solution & Distractor Trap Analysis

3.4 cm lies between 2.5 cm (5,000 bp) and 4.2 cm (2,500 bp). Therefore, the fragment is between 2,500 and 5,000 bp....

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

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