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If an enzyme makes a single cut on a plasmid, how many bands will you see on the gel?fourthreetwoone

Question

If an enzyme makes a single cut on a plasmid, how many bands will you see on the gel?

fourthreetwoone

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Solution

When an enzyme makes a single cut on a plasmid, it linearizes the plasmid. Here's the explanation of how this affects the bands seen on a gel electrophoresis:

  1. Understanding Plasmids: Plasmids are typically circular DNA molecules. When they remain circular, they may run as a single band on an agarose gel.

  2. Effect of the Cut: When an enzyme (restriction endonuclease) makes a single cut in the circular plasmid, it converts it into a linear form. This linearized plasmid will then migrate differently on the gel compared to the circular form.

  3. Result on Gel: After running the gel, if the plasmid was originally a single circular plasmid, after one cut it will be in linear form, resulting in one band appearing on the gel.

Final Answer

You will see one band on the gel after the enzyme makes a single cut on the plasmid.

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