Questions

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

The price of a chair is Rs. 500. It has been sold at two succesive discounts of 10% each. What is its selling price?

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

Which of the following states has the lowest literacy rate?

A ball, thrown vertically upward, rises to a height of 80 m and returns to its original position. The magnitude of its displacement after 7 s of motion will be ____. (take g = 10 m/s2)

A serial port can

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.
Having or involving an extreme or irrational fear of or aversion to something.

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?