Human Health and Diseases Chapter-Wise Test 10

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following diseases is associated with severe immunosuppression?

Tuberculosis
AIDS
Typhoid
Dengue
2

AIDS, caused by HIV, leads to severe immunosuppression by destroying CD4+ T-lymphocytes.

Which of the following is a symptom of severe malaria?

Mild fever
Persistent cough
Severe anemia
Joint pain
3

Severe malaria can lead to complications such as severe anemia due to the destruction of red blood cells.

Which organism is responsible for causing amoebiasis?

Entamoeba histolytica
Plasmodium falciparum
Salmonella typhi
Streptococcus pneumoniae
1

Amoebiasis is caused by the protozoan Entamoeba histolytica, which infects the human intestine.

Which of the following statements about cytokines is incorrect?

Cytokines are signaling molecules of the immune system.
Cytokines help in cell-to-cell communication during immune responses.
Cytokines directly attack and destroy pathogens.
Cytokines regulate inflammation and immune responses.
3

Cytokines do not directly attack pathogens; they mediate immune signaling and coordination.

Which of the following statements about the lymphatic system is incorrect?

The lymphatic system helps in immune responses.
Lymphatic vessels transport oxygen to tissues.
Lymph nodes filter pathogens from lymph.
The lymphatic system absorbs dietary fats.
2

Lymphatic vessels do not transport oxygen; they help in immune defense and absorption of fats.

Which of the following statements about inflammation is incorrect?

Inflammation helps eliminate pathogens.
Inflammation always causes harm to the body.
Inflammation increases blood flow to affected areas.
Inflammation plays a role in tissue repair.
2

Inflammation is a defense mechanism that helps eliminate pathogens and repair tissues, though excessive inflammation can sometimes be harmful.

Which of the following statements about antibodies is incorrect?

Antibodies are produced by plasma cells.
Antibodies help neutralize pathogens.
Antibodies can destroy bacteria directly.
Antibodies recognize and bind to specific antigens.
3

Antibodies do not directly destroy bacteria; they mark them for destruction by immune cells.

Which of the following is an example of a toxoid vaccine?

Polio vaccine
BCG vaccine
Tetanus vaccine
Hepatitis B vaccine
3

The tetanus vaccine is a toxoid vaccine, meaning it contains an inactivated toxin to stimulate immunity.

Which of the following statements about interferons is correct?

Interferons are produced by virus-infected cells.
Interferons attack bacteria directly.
Interferons suppress the immune response.
Interferons prevent antibody production.
1

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

Which of the following diseases is NOT caused by bacteria?

Tuberculosis
Typhoid
Malaria
Diphtheria
3

Malaria is caused by the protozoan Plasmodium, not bacteria.

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