- A Color visible under UV illumination
- B Size (smaller fragments travel farther)
- C Charge alone, independent of fragment size
- D Shape alone, independent of molecular weight
Correct answer: B. Size (smaller fragments travel farther)
Explanation: In gel electrophoresis, DNA fragments migrate through agarose gel in an electric field. Smaller fragments travel faster and farther.
Concept context
Recombinant DNA, GMOs, PCR, CRISPR, and biotechnology applications. Growing importance in NEET.
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