Genetic Engineering Concepts and Techniques

The video tutorial explains a genetic engineering technique where a new gene is inserted into a bacterial plasmid. It describes the use of restriction enzymes like EcoR1 to cut DNA at specific sequences, creating sticky ends for new DNA attachment. DNA ligase then joins the DNA strands. The engineered bacteria are cultured to produce large quantities, each carrying the new gene, which leads to the production of the desired protein.

What is a plasmid in the context of genetic engineering?

• A culture medium for bacteria

• A protein that cuts DNA

• A type of virus

• A loop of bacterial DNA

Which enzyme is used to cut DNA at specific sequences?

• Helicase

• EcoR1

• DNA ligase

• RNA polymerase

What sequence does the EcoR1 enzyme specifically recognize and cut?

• GCGC

• GAATTC

• TATA

• AATTCC

What is the role of DNA ligase in genetic engineering?

• To insert new genes into plasmids

• To cut DNA at specific points

• To grow bacteria in culture medium

• To stitch together DNA fragments

What happens to genetically engineered bacteria in a culture medium?

• They become resistant to antibiotics

• They stop producing proteins

• They produce large numbers of the inserted gene

• They die off quickly