Gel Electrophoresis -Multiple Choice Questions Quiz

Interactive MCQs on “Gel Electrophoresis”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is gel electrophoresis used for?

(a) DNA replication
(b) Protein synthesis
(c) Separating and analyzing DNA fragments or proteins based on their size and charge
(d) Cell division

Question 2: Which type of gel is commonly used in DNA gel electrophoresis?

(a) Agarose gel
(b) Polyacrylamide gel
(c) Sodium gel
(d) Silicone gel

Question 3: In gel electrophoresis, which direction do DNA fragments or proteins migrate in the gel?

(a) Toward the anode (positive electrode)
(b) Toward the cathode (negative electrode)
(c) Toward the center of the gel
(d) They do not migrate; the gel remains stationary.

Question 4: How are DNA fragments or proteins visualized after gel electrophoresis?

(a) Using ultraviolet (UV) light and a specialized stain
(b) By observing the gel under infrared light
(c) By smelling the gel
(d) By feeling the gel for changes in temperature

Question 5: What determines the migration rate of DNA fragments in gel electrophoresis?

(a) Their size and charge
(b) Their color
(c) Their shape
(d) Their function

Question 6: Which type of DNA gel electrophoresis is commonly used to analyze the results of polymerase chain reaction (PCR)?

(a) Agarose gel electrophoresis
(b) Polyacrylamide gel electrophoresis
(c) Native gel electrophoresis
(d) Gradient gel electrophoresis

Question 7: What is the purpose of a DNA ladder or marker in gel electrophoresis?

(a) To provide structural support to the gel
(b) To visualize the gel under UV light
(c) To help determine the size of unknown DNA fragments
(d) To catalyze the DNA migration process

Question 8: Which type of gel electrophoresis is commonly used to separate proteins based on their size and charge?

(a) Agarose gel electrophoresis
(b) Polyacrylamide gel electrophoresis
(c) Native gel electrophoresis
(d) Gradient gel electrophoresis

Question 9: What is the purpose of the loading buffer in gel electrophoresis?

(a) To provide electrical conductivity to the gel
(b) To stabilize the gel matrix
(c) To carry the DNA fragments or proteins into the gel wells
(d) To give color to the gel

Question 10: Which of the following statements is true regarding gel electrophoresis?

(a) It is only used to amplify DNA.
(b) It is a technique used in genetic engineering.
(c) It separates DNA or proteins based on their size and charge.
(d) It is primarily used in microscopy.