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When can DNA clean-up be useful in electroporation?

Answer and explanation

Correct answer: To reduce salt

The direct answer is D: DNA clean-up can reduce salt before electroporation. Electroporation uses a brief electric pulse to make temporary pores in the cell membrane so DNA can enter. If the DNA preparation contains too much salt or other conductive material, the electric field may cause arcing or an excessive current. This can damage cells and make transformation inefficient. A clean-up step removes or reduces salts and contaminants, making the sample more suitable. Option D is correct. Option A is not the purpose of clean-up; protein production occurs later after successful expression. Option B is wrong because clean-up does not dry the host cells. Option C is wrong because it does not specifically remove a genetic marker from the plasmid. The exact procedure depends on the protocol, and clean-up must also avoid losing too much DNA. Memory cue: before electroporation, low salt helps prevent sparks.

Related tags

ElectroporationDna CleanupSalt

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