Biology Biotechnology Principles and Processes All Topic Question For Revision Test Single Correct MCQ
Published on: August 13, 2026

Having become an expert on gel electro-phoresis, you are asked to examine a gel for a colleague. Where would you find the smallest segments of DNA?

A
Near the positive electrode, farthest away from the walls
B
Near the negative electrode, close to the walls
C
Near the top, near the negative pole
D
Near the middle; they tend to slow down after the first few minutes

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Text Solution

Verified by Experts
The correct answer is:
A

DNA is negatively charged and moves toward the positive electrode (anode) during gel electrophoresis. Smaller DNA fragments move faster and travel farther from the wells.

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