Recombinant DNA Technology Concepts

The video explains recombinant DNA technology for producing human insulin. It covers obtaining DNA from human pancreatic cells, using restriction enzymes to cut DNA and plasmids, and forming recombinant plasmids. The process of transforming E. coli bacteria with these plasmids is detailed, including selection using antibiotic resistance. Finally, the video describes culturing transformed bacteria to produce insulin polypeptides.

What is the primary application of recombinant DNA technology discussed in the video?

• Development of vaccines

• Synthesis of vitamins

• Creation of new antibiotics

• Production of human insulin

Which enzyme is used to cut the DNA encoding human insulin?

• DNA polymerase

• Restriction enzyme

• Ligase

• Helicase

What is the role of DNA ligase in the formation of recombinant plasmids?

• To degrade unwanted DNA

• To replicate DNA

• To join DNA fragments with plasmids

• To cut DNA strands

How are transformed bacteria with recombinant plasmids identified?

• By their resistance to antibiotics

• By their color

• By their size

• By their shape

What happens to bacteria that do not pick up any plasmids?

• They cannot survive on the agar plate

• They produce insulin

• They survive and multiply

• They become resistant to all antibiotics

Why do transformed bacteria with non-recombinant plasmids survive on tetracycline plates?

• They have an intact tetracycline resistance gene

• They produce insulin

• They do not require plasmids to survive

• They are naturally resistant to tetracycline

Which antibiotic resistance gene is used to select transformed bacteria initially?

• Penicillin

• Streptomycin

• Ampicillin

• Tetracycline

What is the purpose of culturing transformed bacteria in fermenters?

• To make the bacteria resistant to more antibiotics

• To produce more copies of the recombinant plasmid

• To increase the size of the bacteria

• To change the color of the bacteria

What is the final product extracted from the bacteria?

• Polypeptides processed into human insulin

• Vitamins

• Antibiotics

• DNA fragments

What is the role of gene expression in the production of human insulin?

• To cut DNA strands

• To produce polypeptides

• To degrade unwanted DNA

• To replicate plasmids