Human Immunity

Free sample questions

Human Immunity — sample Biology questions with answers

1. Question 1

   What type of immunity is present from birth and is non-specific to particular pathogens?

   • AAcquired immunity
   • BInnate immunity
   • CHumoral immunity
   • DCellular immunity

   Answer: B. Innate immunity

   Innate immunity is the first line of defence that is non-specific and present from birth.

2. Question 2

   Which white blood cell is responsible for phagocytosis of pathogens?

   • A$B$ lymphocyte
   • B$T$ lymphocyte
   • CNeutrophil
   • DPlasma cell

   Answer: C. Neutrophil

   Neutrophils are phagocytes that engulf and destroy pathogens by phagocytosis.

3. Question 3

   What is the name of the protein produced by plasma cells to neutralise antigens?

   • AAntigen
   • BAntibody
   • CInterferon
   • DHistamine

   Answer: B. Antibody

   Antibodies are proteins secreted by plasma cells to bind and neutralise antigens.

4. Question 4

   In the humoral immune response, which cell produces antibodies?

   • AHelper $T$ cell
   • BCytotoxic $T$ cell
   • CPlasma cell
   • D$B$ memory cell

   Answer: C. Plasma cell

   Plasma cells are effector cells derived from $B$ cells and produce antibodies.

5. Question 5

   What type of immunity is obtained through vaccination?

   • ANatural active immunity
   • BArtificial active immunity
   • CNatural passive immunity
   • DArtificial passive immunity

   Answer: B. Artificial active immunity

   Vaccines stimulate the immune system to produce its own antibodies, which is artificial active immunity.