Question

what are the common materials used to create the gel matrix in gel electrophoresis?
o a. agarose or rna
o b. dna or rna
o c. electricity and coagulate
o d. agarose or polyacrylamide
question 5
1 pts
what is the role of electric current in gel electrophoresis?
o a. when an electric current is applied, it causes the charged molecules move towards the opposite end of the gel.
o b. it breaks apart the molecules into fragments
o c. it causes the damaged molecule fragments to join back together
o d. nothing. electricity isnt used as it will damage the molecules

Explanation:

• For the first question: Agarose or polyacrylamide are common gel matrix materials. RNA and DNA are molecules separated in gel electrophoresis, not gel matrix materials. Electricity is used to drive the process, not a gel matrix material.
• For the second question: In gel electrophoresis, an electric current causes charged molecules (like DNA which is negatively - charged) to move towards the opposite end (positive end for DNA). It does not break molecules (that's done by enzymes like restriction enzymes), nor does it join damaged fragments. Electricity is essential for the separation process.

Answer:

• First question: D. agarose or polyacrylamide
• Second question: A. When an electric current is applied, it causes the charged molecules move towards the opposite end of the gel.