Molecular Grade Plasmid Isolation Steps

This video tutorial demonstrates the process of isolating molecular grade plasmid DNA. It covers the steps from resuspending bacterial cells to eluting the isolated DNA. The procedure includes mixing solutions, neutralizing, centrifuging, transferring DNA to a spin column, washing, and finally eluting the DNA for storage. The tutorial emphasizes the efficiency and cost-effectiveness of molecular grade plasmid isolations, suitable for various applications.

What is one advantage of molecular grade plasmid isolations?

• They are more expensive.

• They are slower.

• They are more cost-effective.

• They are less reliable.

What is the first step in preparing molecular grade plasmid DNA?

• Centrifuge the sample.

• Add wash solution.

• Resuspend bacterial cells.

• Add neutralization solution.

How many times should you invert the tubes after adding the L solution?

• Two to three times.

• Four to six times.

• Ten times.

• Seven to eight times.

What happens to the bacterial lysate after adding the neutralization solution?

• It evaporates.

• It changes color.

• It becomes cloudy.

• It becomes clear.

What is the purpose of centrifuging the sample after neutralization?

• To mix the solutions.

• To heat the sample.

• To form a pellet of cell debris and chromosomal DNA.

• To dry the sample.

What is the next step after transferring the supernatant to the spin column?

• Incubate at room temperature.

• Add resuspension solution.

• Add more neutralization solution.

• Centrifuge for 1 minute.

How many times should the wash procedure be repeated?

• Twice.

• Four times.

• Once.

• Three times.

What is added to the spin column to elute the plasmid DNA?

• Resuspension solution.

• Neutralization solution.

• Wash solution.

• Elution buffer.

How long should the elution buffer be left on the spin column membrane?

• 1 minute.

• 2 minutes.

• 5 minutes.

• 10 minutes.

At what temperature should the isolated plasmid DNA be stored?

• Room temperature.

• 37°C.

• 4°C.

• -20°C.