Basic Concepts of Immunology-Vaccines NEET Questions

Biology - Biology and Human Welfare

Basic Concepts of Immunology-Vaccines MCQ Questions


1.
Innate immunity is characterised by which of the following features?
A.
It develops only after exposure to antigen
B.
It is mediated solely by B-lymphocytes
C.
It is non-specific and present at the time of birth
D.
It is pathogen-specific and shows memory
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ANSWER :
C. It is non-specific and present at the time of birth
2.
Which of the following is NOT a component of innate immunity?
A.
Acid in stomach and saliva
B.
Interferons secreted by virus-infected cells
C.
Antibodies produced by B-lymphocytes
D.
Skin and mucous membranes
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ANSWER :
C. Antibodies produced by B-lymphocytes
3.
Interferons protect the body by:
A.
Producing antigens on cell surface
B.
Protecting non-infected cells from further viral infection
C.
Directly killing the virus-infected cells
D.
Acting as antibodies against bacteria
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ANSWER :
B. Protecting non-infected cells from further viral infection
4.
Which of the following cells are part of the cellular barrier of innate immunity?
A.
Only T-lymphocytes
B.
Erythrocytes and platelets
C.
Only B-lymphocytes
D.
PMNL-neutrophils, monocytes, natural killer cells and macrophages
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ANSWER :
D. PMNL-neutrophils, monocytes, natural killer cells and macrophages
5.
Mucus coating of epithelium of respiratory tract is an example of:
A.
Physiological barrier
B.
Cytokine barrier
C.
Physical barrier
D.
Cellular barrier
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ANSWER :
C. Physical barrier
6.
Acid in the stomach acts as which type of barrier?
A.
Cytokine barrier
B.
Physiological barrier
C.
Physical barrier
D.
Cellular barrier
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ANSWER :
B. Physiological barrier