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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?

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

He watched as fights (1)/ broke out (2)/ along the city. (3)/No Error (4)

Postage Meter was invented by

The Harappan Civilization flourished around 2500 BC in what we call today ____

Which of the following was not actively engaged in social and religious reforms in India ?

Who is the current FIFA president?

In the following question, out of the given four alternatives, select the one which best expresses the meaning of the given word.

Laconic

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

Count one's blessings