Questions

Which molecule is nonpolar and has a symmetrical shape?

Which element has the lowest ionization energy?

In the following question, a sentence has been given in Active/Passive voice. Out of four alternatives suggested, select the one which best expresses the
same sentence in Passive/Active voice.

I saw the master conducting the orchestra.

Afghan-India Friendship Dam is

Which of the following rivers does NOT originate from Amarkantak Plateau or nearby places?

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

What is the difference between the following declarations?

extern int fun();

int fun();

The only bird which can fly backward is