The antigen-binding sites of an antibody molecule are formed from the molecule's variable regions. Why are these regions described as variable?

1.	They can change their shapes to fit different antigens.
2.	They change their shapes when they bind to an antigen.
3.	Their specific shapes are unimportant.
4.	The amino acid sequences of these regions vary widely among antibodies from different B cells.

Chemicals produced by virus-infected cells that alert neighboring cells to prepare a defense are called:

The earlier concept of Health was

1. A state of body and mind

2. Where there was a balance of certain humor

3. A state of mind, body, and heart

4. More than one option

The assertion by Hippocrates about health was

1.    Same as that of Indian Ayurveda system

2.    Different from Indian Ayurveda System

3.   Supported by some other early Greeks

4.   More than one option

The person with Black bile were considered to be

1.    Belonged to black pigmentation group

2.    Belonged to hot personality

3.   Belonged to hot personality having fevers

4.   Belonged to black pigmentation will be prone to fever

The good humor hypothesis of health was disproved by

1.    The discovery of blood circulation by William Harvey using experimental methods

2.    Demonstration of normal body temperature in people with black bile using a thermometer

3.   Both 1 and 2

4.   Observing vector born disease

What is the present concept of health?

1.    Mind influences directly our immune system

2.    Mind influences our immune system by means of the neural system

3.   Mind influences our immune system by means of the endocrine system which controls health.

4.   Mind influences our immune system by means of the neural and endocrine system which controls health.

Which of the following won't affect health?

1.    Genetic disorders And infections

2.    Mind and mental state with black bile

3.   Lifestyle; our habits and some habits which we lack

4.   Rest and exercise

What does health mean?

1.    Absence of disease

2.    Physical fitness

3.   State of complete physiological, mental and social well being

4.   State of complete physical, mental and social well being

Healthy people won't support which of the following options?

1.    More efficient at work

2.    Increases productivity and brings economic prosperity

3.   Increases longevity of resources

4.   Reduces infant and maternal mortality rate