Questions

In the following question, out of the given four alternatives, select the one which is opposite in meaning of the given word.

Abutting

Who appoints the members of the State Public Service Commission ?

Pressure cooker cooks rice faster because

A ________________ is known by different names in different parts of the world. It is called a ‘hurricane’ in North America.

Which one of the following events is not correctly matched with the year in which it happened?

'Mooh Band Rakho' campaign to protect individuals from cyber frauds was launched by

Three words in bold letters are given in each question, which have something in common among themselves. Out of the four given alternatives, choose the most appropriate description about these three words.

Abhi Bhattacharya: Utpal Dutt: Satyajit Ray

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.

The antigen-antibody immunological reaction is used to be regarded as typical of immunological responses. Antibodies are proteins synthesized by specialized cells called plasma cells, which are formed by lymphocytes (cells from the lymph system) when an antigen, a substance foreign to an organism's body, comes in contact with lymphocytes. Two important manifestations of antigen-antibody immunity are lysis, the rapid physical rupture of antigenic cells and the liberation of their contents into the surrounding medium, and phagocytosis, a process in which antigenic particles are engulfed by and very often digested by macrophages and polymorphs. The process of lysis is executed by a complex and unstable blood constituent known as complement, which will not work unless it is activated by a specific antibody; the process of phagocytosis is greatly facilitated when the particles to be engulfed are coated by a specific antibody directed against them.

What are antibodies?