Biology Multiple Choice Questions and Answers for Different Competitive Exams

MCQ on Immunology- Innate immune response

1. Nonspecific host defences that exist prior to exposure to an antigen is called
a) acquired immunity
b) innate immunity
c) adaptive immunity
d) all of these
2. Innate immunity is also called
a) familial
b) genetic
c) inborn
d) all of these
3. Innate immunity involves all except
a) anatomic barriers
b) phagocytic
c) inflammatory mechanisms
d) antibody production
4. First line of defence include
a) skin
b) mucus
c) lysozyme secretion
d) all of these
5. Skin prevents pathogen entry
Skin
a) dead cells of the skin outer layer prevents pathogen entry
b) skin secretes oil by sebaceous gland that makes surface acidic
c) skin secretes sweat by sudoriferous gland that makes surface acidic
d) all of these
6. Stomach clear out pathogens by
a) secreting HCl
b) secreting digestive enzymes
c) both a and b
d) none of these
7. Vaginal bacterial symbionts like Lactobacilli prevents pathogen by
a) producing lactic acid thereby reducing pH
b) secreting antibiotics
c) secreting toxins
d) none of these
8. Bodies internal defence or second line of defence include
a) phagocytes
b) fever
c) interferons
d) all of these
9. The functions of macrophages include


a) phagocytosis
b) antigen presenting cells
c) cytokine production
d) all of these
10.Kupffer cells are macrophages found on
a) lung
b) bone
c) nephrons
d) liver
11. Neutrophils are
a) phagocytes
b) short lived leucocytes
c) involved in second line of defence
d) all of these
12. Tissue damage caused by wound or invading pathogenic organisms induces a complex sequence of events collectively known as 
a) opsonisation
b) phagocytosis
c) inflammation
d) none of these
13. Temperature rising chemicals are called
a) pyrogens
b) thermogens
c) both a and b
d) none of these
14. The internal second line of defence involves all except
a) natural killer cells
b) complement system
c) interferons
d) antibodies
15. Antiviral glycoproteins released by living cells in response to viral attack and induce a viral resistant state to neighbouring cells is called as
a) natural killer cells
b) complement system
c) interferons
d) phagocytes
Answers
  1. b) innate immunity
  2. d) all of these
  3. d) antibody production
  4. d) all of these
  5. d) all of these
  6. c) both a and b
  7. a) producing lactic acid thereby reducing pH
  8. d)all of these
  9. d) all of these
  10. d) liver
  11. d) all of these
  12. c) inflammation
  13. a) pyrogens
  14. d) antibodies
  15. c) interferons 
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