Gel electrophoresis is a method to separate dna fragments, rna, and proteins based on their size. it involves running a current through a gel containing the molecules of interest. electrophoresis depends on their size and charge, and then the molecules will travel through the gel in various directions or

or by free electrophoresis.

Explanation:Hello, free electrophoresis is a solution. The separation depends on the different electric charges of the molecule and its mass.

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option a and d is the correct answer

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sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.