How does pepsinogen change into its active form?

Name the chemical substance that changes pepsinogen into its active form.

How does plant cell change its shape?

How is Bt toxin converted into active form?

How does surface tension change with temperature?

Protein found in a biological system with a unique three dimensional structure and biological activity is called a native protein. When a protein in its native form, is subjected to a physical change like change in temperature or a chemical change like, change in pH, denaturation of protein takes place. Explain the cause.

How does a liquid change into vapour without boiling ?