Not all the infections occurring in the body result in disease because of

1.    All infections are not strong enough to cause disease

2.    Body fights and is able to defend from few foreign agents

3.   Immunity

4.   Environmental factors

Which of the following is a physical barrier?

1.    Mucus coating of urogenital tracts

2.    Endothelium of blood vessels

3.   Mucus coating of the auditory meatus

4.   Monocytes

Which of the following is not a physiological barrier?

1.    Acid of stomach

2.    Saliva in the mouth

3.   Tears in eyes

4.   Mucus coating of epithelium of respiratory tract

Which of the following is not a cellular barrier?

1.    PMNL

2.    Monocytes

3.   Macrophages

4.   Virus-infected cells

Anamnestic Response is generated by

1.    First interaction of the pathogen with the body

2.    Second interaction of the pathogen with the body

3.   Response against self cells

4.   Response against not a potential antigen

The B lymphocytes produce an army of proteins in response to pathogens into our body to fight with them and T lymphocytes help B lymphocytes to produce that army.

And such proteins are known as

1.    Cytokines

2.    Interferons

3.   Antibodies

4.   Allergen

The response generated by antibodies is called

1.    Cell-mediated Immune response

2.    Humoral immune response

3.   Primary immune response

4.   Anamnestic immune response

During transplantation, which immunity causes rejection?

1.    Humoral immunity

2.    CMI

3.   Innate immunity

4.   Antibody mediated immunity

In the structure of an antibody; which terminal has antigen-binding site?

1.    N

2.    C

3.   N terminal of heavy chain and C terminal of light chain

4.   C terminal of heavy chain and N terminal of light chain

IgM is pentamerous and the weight of the heavy chain is 1000000 Da and that of the light chain is approximately half of the heavy chain, then find the weight of IgM.

1.    More than 1500kDa

2.    150kDa

3.   15 kDa

4.   300 kDa