2nd Year Biology Chapter 9 Test09. Immunity

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which enzyme in sweat helps to break down bacterial cell walls?
   1. Amylase
   2. Lysozyme
   3. Pepsin
   4. Lipase
2. The secretion of sweat and sebaceous glands provides:
   1. Antibiotics
   2. Antimicrobial properties
   3. Carbohydrates
   4. Hormones
3. A patient has a severe burn injury, compromising their skin barrier. Which of the following is most likely to occur?
   1. Increased risk of infection due to loss of chemical and physical barriers
   2. Decreased risk of infection due to increased immune response
   3. No change in infection risk
   4. Increased risk of autoimmune disease
4. Natural active immunity is obtained as a result of:
   1. Vaccination
   2. Infection
   3. Blood transfusion
   4. Transplant
5. Plasma cells are derived from:
   1. Helper T cells
   2. Cytotoxic T cells
   3. B cells
   4. NK cells
6. The raised body temperature due to infection is called:
   1. Pyrexia
   2. Hyperthermia
   3. Hypothermia
   4. Sepsis
7. Lymphokines, such as interleukins, play a crucial role in coordinating the immune response. What would be the consequence of impaired lymphokine production?
   1. Enhanced activation of cytotoxic T-cells
   2. Reduced activation of immune cells
   3. Increased production of antibodies
   4. Enhanced phagocytic activity of neutrophils
8. When one receives a booster shot for polio which type of cell is most directly stimulated?
   1. killer T-cells
   2. memory cells
   3. phagocytes
   4. suppressor cells
9. Neutrophils use extracellular traps to kill pathogens. What is the primary advantage of this mechanism?
   1. Targeted killing of specific pathogens
   2. Ability to phagocytose large pathogens
   3. Immobilization of pathogens in a localized area
   4. Activation of complement system
10. The variable region of antibody functions as:
    1. Enzyme binding site
    2. Antigen binding site
    3. Hormone receptor
    4. Cytokine site