Home Biology Biotechnology Principles and Processes Previous Year Questions In a mixture, DNA fragments are separated by
Biology Biotechnology Principles and Processes Previous Year Questions Single Correct MCQ
Published on: August 21, 2026

In a mixture, DNA fragments are separated by

A
Restriction digestion
B
Electrophoresis
C
Polymerase chain reaction
D
Bioprocess engineering

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The correct answer is:
B

DNA fragments in a mixture can be separated on the basis of their size by a technique known as gel electrophoresis. In this techniques, DNA samples are loaded into wells (indentations) at one end of a gel, and an electric current is applied to pull them through the gel. DNA fragments are negatively charged, so they move towards the positive electrode.

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