Question

DNA moves towards ______ during agarose gel electrophoresis.

(a) negative terminal

(b) cathode

(c) anode

(d) does not move

This question was posed to me in an international level competition.

Question is taken from Biotechnology in section Biotechnology Principles and Processes of Biology – Class 12

Answer 1

The correct answer is (c) anode

Easiest explanation: During agarose gel electrophoresis the DNA moves towards the anode. Since DNA is negatively charged it moves toward the positively charged terminal. An anode is a positive terminal while the cathode is the negative terminal.