Human Health and Diseases Chapter-Wise Test 13

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about cytokines is incorrect?

Cytokines help regulate immune responses.
Cytokines act as signaling molecules between immune cells.
Cytokines directly kill pathogens.
Cytokines play a role in inflammation.
3

Cytokines do not directly kill pathogens; they help in communication between immune cells and modulate immune responses.

Which of the following methods is most effective in preventing the spread of cholera?

Using mosquito nets
Drinking boiled or purified water
Taking antibiotics regularly
Wearing a mask
2

Cholera is a waterborne disease, and drinking clean, purified water is the most effective way to prevent its spread.

Which immune cells are responsible for producing histamine in allergic reactions?

Neutrophils
B-lymphocytes
Mast cells
T-lymphocytes
3

Mast cells release histamine, which causes inflammation and other allergic symptoms.

Which of the following is an example of innate immunity?

Production of antibodies
Memory response of lymphocytes
Skin acting as a barrier
Vaccination
3

Innate immunity includes physical barriers like skin, which prevents the entry of pathogens.

Which mosquito species is responsible for transmitting dengue fever?

Culex
Anopheles
Aedes
Mansonia
3

Dengue fever is transmitted by the Aedes mosquito, primarily Aedes aegypti.

Which of the following statements about macrophages is incorrect?

Macrophages are involved in phagocytosis.
Macrophages function as antigen-presenting cells.
Macrophages produce antibodies.
Macrophages help initiate an immune response.
3

Macrophages do not produce antibodies; instead, they engulf pathogens and present antigens to activate other immune cells.

Which of the following statements about natural killer (NK) cells is correct?

NK cells are a type of B-lymphocyte.
NK cells destroy virus-infected and cancerous cells.
NK cells produce antibodies.
NK cells only function in the adaptive immune response.
2

Natural killer (NK) cells are a part of the innate immune system and destroy virus-infected and cancerous cells.

Which of the following is a viral disease?

Malaria
Typhoid
Common cold
Ringworm
3

The common cold is caused by rhinoviruses, which infect the upper respiratory tract.

Which of the following conditions is NOT an autoimmune disease?

Rheumatoid arthritis
Lupus
AIDS
Multiple sclerosis
3

AIDS is caused by HIV, whereas rheumatoid arthritis, lupus, and multiple sclerosis are autoimmune diseases.

Which of the following is a major symptom of elephantiasis?

Skin rashes
Severe swelling of limbs
High fever
Severe diarrhea
2

Elephantiasis, caused by filarial worms, leads to severe swelling of limbs due to blockage of lymphatic vessels.

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