Assertion : Interferons are a type of antibodies produced by body cells infected by bacteria.
Reason : Interferons stimulate inflammation at the site of injury.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark a
B. lf both Assertion & Reason are true but the reason is no t the correct explanation of the assertion, then mark b
C. If Assertion is true statement but Reason is false, then mark c
D. If both Assertion and Reason are false statements, then mark d.

Answer

D

Explanation

Interferons are not antibodies. These are natural proteins produced by the cells of the immune systems of most animals in response to challenges by foreign agents such as viruses, bacteria, parasites and tumor cells. Interferons belong to the large class of glycoproteins known as cytokines. In human body there are three are three types of interferon `-alpha, beta and gamma`. Interferon alpha and beta are produced by many cell types, including T-cells and B-cells and are important component of the antiviral response. They simulate both macrophages and NK (Natural Killer) cells. They both are also active against tumors. Interferon gamma is involved in the regulation of the immune and inflammatory response. Interferon gamma has had some antiviral and antitunmor effect but these are generally weak, however, it potentiates the effect of interferon alpha and interferon beta. Inflammation is the first response to infection and injury and is critical to body defence. Basically, the inflammatory response in an attempt by the body to restore and maintain homeostatis after injury. Inflammation is the influx of fluid and cells that results in redness, swelling, heat and pain at the infection site.