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 happens when an antigen comes in contact with lymphocytes?

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best express the same sentence in Indirect/Direct speech.

Mother told me that I should listen to her first and then do anything as I pleased.

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.

In view of last year's H1N1 attack and prevailing ________________ weather conditions, the health department officials _______________ that the virus will turn more active by January end. In-charge, Integrated Disease ________________ Programme (IDSP), Dr Shah, said, "Virus is still active, but not in a major way. In coming months, it is likely to become more active. Last year too, virus had claimed lives in January and February. Therefore, we are _____________ as coming months might _________________ a challenge."

the health department officials _______________

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.

National integration means _____ all the people of the nation into a single whole. It is a _____ that bends together all people in one _____ bond no matter what their religion, caste, language or history may be. It is a _____ cementing force whereby all kinds of people live _____ peacefully and can identify themselves as a part and parcel of a nation.

live _____ peacefully and can identify themselves as a part and parcel of a nation.

In the following question, select the number which can be placed at the sign of ? from the given alternatives.

Who was conferred the Arjuna Award for wrestling in 2015?

The height of a tower is 50√3 m. The angle of elevation of a tower from a distance 50 m from its feet is

Who among the following is the winner of the National Badminton Championship (Men), 2017?