Human Health And Diseases Mock Tests

21 questions available

Human Health And Diseases Mock Test 1

Questions: 21

Sample Questions

Class 12 Biology

HIV primarily causes immunodeficiency in humans by:

A Directly destroying red blood cells, reducing oxygen transport

B Infecting and destroying helper T-lymphocytes (CD4+ T cells), reducing immune response

C Blocking the production of antibodies in plasma cells

D Causing uncontrolled cell division in the bone marrow

Class 12 Biology

Which of the following is a correct match between a disease and its causative agent?

A Malaria — Trypanosoma; Ringworm — Wuchereria; Typhoid — Salmonella

B Malaria — Plasmodium; Ringworm — Trichophyton; Typhoid — Salmonella

C Malaria — Leishmania; Ringworm — Ascaris; Typhoid — E. coli

D Malaria — Plasmodium; Ringworm — Candida; Typhoid — Vibrio

Class 12 Biology

HIV primarily infects and destroys which type of immune cells in humans:

A B-cells

B Helper T-cells (CD4+ T-cells)

C Red blood cells

D Neutrophils

Class 12 Biology

Malaria is caused by which species of Plasmodium and is transmitted by which vector?

A Plasmodium vivax; female Anopheles mosquito

B Plasmodium falciparum; female Aedes mosquito

C Plasmodium malariae; female Culex mosquito

D Plasmodium ovale; female Anopheles mosquito

Class 12 Biology

The "membrane attack complex" (MAC) in the human complement system functions by:

A Creating pores in the pathogen's cell membrane, leading to cell lysis and death

B Coating the pathogen surface to enhance phagocytosis by macrophages

C Neutralising bacterial toxins by binding to their active sites

D Stimulating B cells to produce antibodies specific to the pathogen

Class 12 Biology

Kaposi's sarcoma, non-Hodgkin's lymphoma, and certain types of carcinoma are classified as:

A AIDS-defining cancers caused by immunosuppression from HIV

B Occupational diseases caused by chemical exposure

C Genetic disorders linked to chromosomal abnormalities

D Vegetative phase disorders of the endocrine system

Class 12 Biology

In the human immune response, which type of lymphocytes is primarily responsible for cell-mediated immunity?

A B-lymphocytes (B-cells)

B T-lymphocytes (T-cells)

C Macrophages

D Natural killer cells

Class 12 Biology

Biochemical Oxygen Demand (BOD) is an indicator of water pollution because it measures:

A The amount of dissolved oxygen required by aerobic microorganisms to decompose organic matter in water — higher BOD means more pollution

B The total amount of oxygen dissolved in water available for aquatic organisms to breathe

C The rate at which plants and algae produce oxygen through photosynthesis in water

D The concentration of chemical oxidising agents present in the water sample

Comments

No comments yet. Be the first to share your thoughts!