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.

One of the two important manifestations of antigen-antibody immunity is lysis while the other is

If a mirror is placed on the line MN, then which of the answer figures is the right image of the given figure?

To enlarge their hold over India, many wars were fought between British and Indians but NOT one of the following.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.

MPK, NRN, OTQ, PVT, ?

Headquarters of International Gas Union (IGU) located in

An object weighing 20 kg is raised through a height of 2 m. What will be the work done by the force of gravity in this process?

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

Beguile

In the following question, a word has been written in four different ways out of which only one is correctly spelt. Select the correctly spelt word.