NEET Biology question

What is the criterion for DNA fragments' movement on an agarose gel during gel electrophoresis? [NEET 2017]

(A)The smaller the fragment size, the farther it movesCorrect
(B)Positively charged fragments move to the farther end
(C)Negatively charged fragments do not move
(D)The larger the fragment size, the farther it moves

Answer: (A)

Solution

DNA fragments are uniformly negatively charged (so charge sign is not the differentiating criterion, ruling out options b and c) and they do move through the gel, and since

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Question ID VK-125185