Human Health and Diseases Chapter-Wise Test 19

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following is an example of a live-attenuated vaccine?

Hepatitis B vaccine
Polio (oral) vaccine
Tetanus toxoid
DPT vaccine
2

The oral polio vaccine contains live-attenuated poliovirus, which helps induce immunity without causing disease.

Which immunoglobulin is primarily involved in allergic reactions?

IgA
IgG
IgM
IgE
4

IgE antibodies trigger allergic reactions by binding to mast cells and causing histamine release.

Which disease is associated with abnormal proliferation of lymphocytes?

Tuberculosis
Hepatitis
Leukemia
AIDS
3

Leukemia is a type of blood cancer characterized by uncontrolled proliferation of abnormal lymphocytes.

Which immune component is responsible for transplant rejection?

B-lymphocytes
T-lymphocytes
Macrophages
Neutrophils
2

T-lymphocytes play a key role in transplant rejection by recognizing foreign tissues as non-self and attacking them.

Which part of the immune system is responsible for the production of antibodies?

T-lymphocytes
B-lymphocytes
Macrophages
Neutrophils
2

B-lymphocytes produce antibodies as part of the humoral immune response.

Which of the following statements about interferons is correct?

Interferons help protect cells from viral infections.
Interferons attack bacteria directly.
Interferons suppress the immune response.
Interferons prevent the production of cytokines.
1

Interferons are signaling proteins released by virus-infected cells that help protect nearby cells from viral replication.

Which of the following statements about phagocytes is incorrect?

Phagocytes help in engulfing and digesting pathogens.
Neutrophils and macrophages are examples of phagocytes.
Phagocytes secrete antibodies to neutralize pathogens.
Phagocytosis is a key process in innate immunity.
3

Phagocytes do not secrete antibodies; instead, they engulf and digest pathogens as part of the innate immune response.

Which of the following statements about autoimmune diseases is correct?

Autoimmune diseases occur when the immune system attacks its own body cells.
Autoimmune diseases are caused by bacterial infections.
Autoimmune diseases occur due to external allergens.
Autoimmune diseases can be treated with antibiotics.
1

Autoimmune diseases arise when the immune system mistakenly attacks the body's own cells and tissues.

Which of the following statements about cytokines is incorrect?

Cytokines are involved in immune cell signaling.
Cytokines regulate inflammation.
Cytokines are enzymes that digest food.
Cytokines help in communication between immune cells.
3

Cytokines are signaling molecules, not digestive enzymes, and they help regulate immune responses.

Which component of the immune system is responsible for long-term immunity?

Neutrophils
Memory B-cells
Macrophages
Basophils
2

Memory B-cells provide long-term immunity by recognizing and responding to previously encountered pathogens.

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