What are competent cells? Why protease is added at the time of isolation of DNA?

What is the significance of adding proteases at the time of isolation of genetic material (DNA) ?

What is the name of complex formed at the time of action of T-cells?

What is reproductive isolation?

Why E.Coli is used as competent host in r DNA technology?

Why are proteases generally released in inactive form? What is emulsification and why it is required?

In what form and why are many proteases released inactive form? Name the three intestinal enzymes involved in protein digestion.

Give one reason as to why many of the intestinal proteases are secreated in an inactive form.

Which cell organelle is called kitchen of cell and why ?