Human Health and Diseases Chapter-Wise Test 16

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following diseases is NOT transmitted through contaminated water?

Cholera
Typhoid
Dengue
Amoebiasis
3

Dengue is a vector-borne disease transmitted by the Aedes mosquito, not through contaminated water.

Which hormone stimulates the production of white blood cells?

Erythropoietin
Thymosin
Insulin
Glucagon
2

Thymosin, secreted by the thymus, promotes the development and differentiation of T-lymphocytes.

Which enzyme helps the HIV virus to integrate its genetic material into the host DNA?

DNA polymerase
Reverse transcriptase
Ligase
RNA polymerase
2

Reverse transcriptase is an enzyme that converts the RNA of HIV into DNA, allowing it to integrate into the host genome.

Plasmodium, the causative agent of malaria, is transmitted by:

Male Anopheles mosquito
Female Anopheles mosquito
Housefly
Flea
2

Malaria is transmitted by the female Anopheles mosquito, which carries Plasmodium in its salivary glands.

Which of the following statements about antibodies is correct?

Antibodies are produced by plasma cells.
Antibodies directly kill pathogens.
Antibodies are part of the innate immune system.
Antibodies cannot bind to antigens.
1

Antibodies are produced by plasma cells (activated B-lymphocytes) and help in neutralizing pathogens.

Which of the following is a key function of interferons?

Killing bacteria directly
Preventing viral replication
Increasing red blood cell production
Breaking down food in the stomach
2

Interferons are proteins that help prevent viral replication and activate immune responses against infections.

Which of the following is a major symptom of scabies?

Skin itching and rashes
Fever and chills
Severe cough
Paralysis
1

Scabies is caused by the mite Sarcoptes scabiei and leads to intense itching and rashes on the skin.

Which of the following is NOT a vector-borne disease?

Malaria
Dengue
Typhoid
Filariasis
3

Typhoid is caused by Salmonella typhi and spreads through contaminated food and water, not vectors like mosquitoes.

Which of the following statements about immunoglobulin IgA is incorrect?

IgA is found in mucosal secretions like saliva and tears.
IgA provides protection at mucosal surfaces.
IgA is the most abundant antibody in the bloodstream.
IgA helps prevent pathogen entry at mucosal surfaces.
3

IgA is primarily found in mucosal secretions and is not the most abundant antibody in the bloodstream; IgG is the most abundant in blood.

Which of the following statements about allergic reactions is incorrect?

Allergic reactions involve the release of histamine.
Mast cells play a major role in allergic reactions.
IgE antibodies are involved in allergic responses.
Allergic reactions are caused by bacterial infections.
4

Allergic reactions are not caused by bacterial infections but occur due to an overreaction of the immune system to harmless substances.

Performance Summary

Score:

Category Details
Total Attempts:
Total Skipped:
Total Wrong Answers:
Total Correct Answers:
Time Taken:
Average Time Taken per Question:
Accuracy:
0