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 are antibodies?

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.

Most __________________ of all to the rambler on avian lore intent is the fact that there are many species and genera that are peculiar to the West, and ______________ new to him, keeping him constantly on the 'qui vive'. _____________ Colorado you will look in vain for the common blue jay, so abundant in all parts of the East; but you will be more _______________ compensated by the presence of seven other species _____________ the jay household.

but you will be more _______________ compensated

In the following question, a sentence / a part of sentence is underlined. Below are given alternatives to the underlined part which may improve the sentence. Choose the correct alternative. In case no improvement is required, choose "No Improvement" option.

One night they sank through the shiny water, and for the first time since he has known them, began to quickly swim.

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.

He told Pawan that they should have tried harder.

The headquarter of Organisation for Economic Cooperation and Development (OECD) is in _____.

In the following question, select the odd word pair from the given alternatives

UNESCO Headquarters is in

What is the local name given to the parliament of Pakistan?