Question

Serology is the study of
(a)Nutrition
(b)Lizards
(c)Serum
(d)Trypsin

Answer 1

Hint: Serology includes the study of body fluids and regard to the response of the immune system to pathogens or introduced substances. Several laboratory techniques are performed and different types of serologic tests are used to diagnose different disease conditions that focus on proteins made in the immune system.

Complete answer:
Serology is the scientific study of blood serum. It refers to the diagnostic identification of antibodies in the serum and the antibodies are formed in response to infection against other foreign proteins or one's own proteins. The blood tests that look for antibodies in your blood are known as serologic tests. The test results may be normal or abnormal depending on whether there was an interaction with an outside substance.
The body system helps keep the immune system healthy by destroying foreign invaders that can make you ill. Antigens are substances that enter the immune system through the mouth, through broken skin, or the nasal passages. Antigens that commonly affect people include bacteria, fungi, viruses, and parasites. The immune system defends against such antigens by producing antibodies which are particles that attach to the antigens and deactivate them. When blood is tested they identify the type of antibodies and antigens that are in the blood sample and identify the type of infection the person has.
So, the correct answer is ‘Serum’.

Note: An immunoglobulin (Ig) (or antibody) is a large Y-shaped protein that is used by the immune system to defeat the antigens like pathogenic bacteria and viruses. There are various methods to detect antibodies:
Agglutination assay- This assay shows whether antibodies are exposed to certain antigens and it will cause particle clumping.
Western blot- This test determines the presence of antimicrobial antibodies in blood by their reaction with target antigens.