Human Health and Diseases Additional Practice Test

12th Standard Zoology — Human Health and Diseases: Additional Online Practice Test

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Which diagnostic test is commonly used to confirm a clinical diagnosis of typhoid fever?

A.ELISA B.Western blot C.Widal test D.PCR

In which specific part of the human body does the protozoan parasite Entamoeba histolytica primarily reside and feed on mucus and bacteria?

A.Small intestine B.Stomach C.Large intestine D.Liver

Tetanus, commonly known as lock jaw, is a bacterial disease characterized by painful muscle spasms. Which of the following is the causative pathogen of tetanus?

A.Streptococcus pneumoniae B.Clostridium tetani C.Salmonella typhi D.Mycobacterium tuberculosis

Why is it exceptionally difficult to develop a universal vaccine against the common cold?

A.The pathogen is a large multicellular helminth. B.It is caused by over 150 different strains of Rhino viruses whose RNA genome constantly mutates. C.The virus remains dormant in the bone marrow for decades. D.It is caused by anaerobic spore-forming bacteria that resist antibodies.

During the erythrocytic stage of the Plasmodium life cycle in humans, yellowish-brown pigmented granules appear in the large schizont. What are these granules called?

A.Haemozoin granules B.Nissl's granules C.Schuffner's granules D.Acidophilic granules

Which mosquito species acts as the primary vector for transmitting both Dengue fever and Chikungunya to humans?

A.Anopheles stephensi B.Culex pipiens C.Aedes aegypti D.Mansonia uniformis

What is the infective stage of the protozoan parasite Entamoeba histolytica that penetrates the intestinal wall of the host?

A.Cystic stage B.Sporozoite C.Trophozoite D.Merozoite

Ascaris lumbricoides, commonly known as the roundworm, is a parasite of the human intestine. How is this parasite classified based on its host requirements?

A.Digenic parasite B.Monogenic parasite C.Polygenic parasite D.Ectoparasite

Cannabinoids are a group of chemicals obtained from the hemp plant Cannabis sativa. Which neurotransmitter system do cannabinoids directly interfere with in the central nervous system?

A.Acetylcholine B.Serotonin C.Dopamine D.Gamma-aminobutyric acid (GABA)

Q10

Morphine is a widely abused narcotic drug extracted from the opium plant. What is its legitimate medical application?

A.Central nervous system stimulant B.Pain killer used during surgery C.Vaccine adjuvant for viral diseases D.Antidote for heavy metal poisoning

Q11

A sedentary lifestyle can cause a deficiency of which vitamin, leading to fatigue, tiredness, bone loss, and muscle pain?

A.Vitamin A B.Vitamin C C.Vitamin D D.Vitamin K

Q12

Irritable Bowel Syndrome (IBS) is a common gastrointestinal disorder characterized by stomach discomfort and abnormal bowel movements. What is identified as its primary cause?

A.Bacterial infection by Vibrio cholerae B.High-caloric junk food intake C.Stress and associated illness D.Heavy consumption of alcohol

Q13

Swine flu, which was first recognized in the 1919 pandemic and still circulates as a seasonal flu virus, is caused by which viral strain?

A.H5N1 B.H1N1 C.DENV-1 D.Nipah virus

Q14

Which of the following statements is correct regarding the Nipah virus?

A.It is a protozoan disease transmitted by houseflies. B.It is a zoonotic virus that can cause acute respiratory illness and fatal encephalitis. C.It primarily infects the human large intestine, causing severe dysentery. D.It is easily treated and cured with broad-spectrum antibiotics.

Q15

Pneumonia is an infectious disease of the lungs caused by Streptococcus pneumoniae. Which of the following is a classic symptom of pneumonia?

A.Thick mucopurulant nasal discharge B.Rigidity of jaw muscles and rapid heart rate C.Fever, cough, painful breathing, and brown sputum D.Reddish rashes on the skin, neck, and ears

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About this Human Health and Diseases test

This free online practice test covers Human Health and Diseases from the 12th Standard Zoology (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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