Questions

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?

Who  among  the  following  is  the  author  of the  book,  A  comparison  between  Woman and Men?

Which of the following countries is not a member of The South Asian Association for Regional Cooperation (SAARC)?

Mahabharata war lasted for ____ days.

Which country is headed towards a confrontation over Gibraltar with Spain?

By which process the cells of the meristematic tissue take up a permanent shape, size, and a function?

In general enzymes are what kinds of molecules?

In each of the following choose the word most nearly opposite in meaning to the word given in capitals.

“DEROGATORY”