Southern Blotting (https://www.youtube.com/watch?v=CSrUm-EgTK4)

What is the primary purpose of Southern blotting in molecular biology?

• To amplify DNA sequences

• To reveal information about DNA identity, size, and abundance

• To sequence RNA molecules

• To synthesize proteins

What is the first step in the Southern blotting technique?

• Gel electrophoresis

• DNA hybridization

• Digestion of DNA samples with a restriction enzyme

• DNA sequencing

What is another name for a restriction enzyme?

• DNA polymerase

• RNA ligase

• Restriction endonuclease

• DNA helicase

At what temperature are DNA samples incubated overnight after adding the restriction enzyme?

• 25 degrees Celsius

• 37 degrees Celsius

• 50 degrees Celsius

• 100 degrees Celsius

What do restriction enzymes recognize in DNA molecules?

• Random nucleotide sequences

• Specific sequence of nucleotides

• Protein sequences

• Lipid molecules

What is the result of the action of restriction enzymes on DNA?

• Single-stranded DNA

• RNA fragments

• Double-stranded cuts in DNA

• Protein synthesis

What technique is used to separate DNA fragments after restriction enzyme digestion?

• PCR amplification

• Gel electrophoresis

• DNA sequencing

• Western blotting

What is added to DNA samples to aid in gel electrophoresis separation?

• DNA polymerase

• Loading buffer

• RNA primer

• Restriction enzyme

What is the function of the loading buffer in gel electrophoresis?

• To cut DNA into fragments

• To synthesize RNA

• To act as a tracking dye

• To sequence DNA

What type of molecules are restriction sites associated with?

• Proteins

• Lipids

• DNA molecules

• Carbohydrates