Home Biology Biotechnology Principles and Processes NCERT In gel electrophoresis the DNA fragments sep…
Biology Biotechnology Principles and Processes NCERT Single Correct MCQ
Published on: August 14, 2026

In gel electrophoresis the DNA fragments separate according to size (smaller the fragment size, the faster it moves) this effect is called:

A
Sieving effect
B
Movement effect
C
Size effect
D
Spooling

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The correct answer is:
A

In gel electrophoresis, the agarose gel acts as a molecular sieve, so smaller DNA fragments move faster through the pores than larger ones. This is called the sieving effect.

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