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

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?

Headquarters of International Gas Union (IGU) located in

__________________ is a good whose quantity demanded decreases when consumer income rises.

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 asentence is free from error, select 'No Error'.

Internet Service Providers (ISPs) should provide us (1)/ with open networks and should not block or discriminate for (2)/ any application or content that rides overthose networks. (3)/ No error (4)

In the following passage some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

Books are our ______ friends. They are our guides. We can learn everything from them. The books contain all the great ______ of the world's leaders and we can learn them by reading the books. The books help us find ______ to our questions. The books never fail us. We should read as ______ books as we can. But all books are not good. So we should ______ only good books.

the great ______ of our world.

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.