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NEET UG Human Health and Disease — practice questions

Explore 82 free Human Health and Disease questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Human Health and Disease questions and exercises with answers

Showing questions 1–30 of 82.

Typhoid fever in humans is caused by:Read the answer and worked solution →Widal test is used in the diagnosis of:Read the answer and worked solution →The most malignant form of malaria is caused by:Read the answer and worked solution →The infective stage of Plasmodium injected into humans by the female Anopheles mosquito is the:Read the answer and worked solution →Amoebiasis (amoebic dysentery) is caused by:Read the answer and worked solution →Ringworms in humans are caused by:Read the answer and worked solution →The first milk secreted by the mother for a few days after birth, rich in IgA antibodies, is called:Read the answer and worked solution →Rheumatoid arthritis is best classified as:Read the answer and worked solution →The thymus gland:Read the answer and worked solution →MALT (mucosa-associated lymphoid tissue) constitutes approximately what percentage of the body's lymphoid tissue?Read the answer and worked solution →The standard widely used diagnostic test for AIDS is:Read the answer and worked solution →HIV/AIDS is NOT transmitted by:Read the answer and worked solution →Cannabinoids (marijuana, hashish, charas, ganja) are obtained from:Read the answer and worked solution →Which of the following diseases has been completely eradicated worldwide by vaccination?Read the answer and worked solution →Typhoid fever is caused by which pathogen?Read the answer and worked solution →Which mosquito is the vector for malaria caused by Plasmodium falciparum?Read the answer and worked solution →Match each disease to its pathogenRead the answer and worked solution →Order the malaria parasite cycleRead the answer and worked solution →Sort the lymphoid organsRead the answer and worked solution →Catch only the bacterial diseasesRead the answer and worked solution →Mark the term each clue namesRead the answer and worked solution →Sort active from passive immunityRead the answer and worked solution →Group each drug by its plantRead the answer and worked solution →Spot the false claim in each setRead the answer and worked solution →Which Plasmodium species causes malignant malaria, the most serious form?Read the answer and worked solution →Pneumonia-causing bacteria mainly infect which part of the lungs?Read the answer and worked solution →Haemophilus influenzae is a bacterium linked with which human disease?Read the answer and worked solution →Which group of viruses causes the common cold?Read the answer and worked solution →Rhinoviruses infect the nose and airways but do not reach the:Read the answer and worked solution →Symptoms of the common cold usually last for about how long?Read the answer and worked solution →

Worked practice questions

Typhoid fever in humans is caused by:

  1. Entamoeba histolytica
  2. Salmonella typhi
  3. Plasmodium vivax
  4. Streptococcus pneumoniae
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Correct answer: B. Salmonella typhi

**Typhoid** is caused by **Salmonella typhi** — enters small intestine via contaminated food/water, migrates via blood. **Symptoms:** sustained 39–40°C fever, weakness, stomach pain, constipation. Confirmed by **Widal test**.

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Widal test is used in the diagnosis of:

  1. Typhoid
  2. AIDS
  3. Cancer
  4. Malaria
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Correct answer: A. Typhoid

**Widal test** = serological test that detects antibodies against Salmonella antigens → diagnoses **typhoid**. (ELISA is used for AIDS; biopsy/MRI for cancer; blood smear for malaria.)

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The most malignant form of malaria is caused by:

  1. Plasmodium malariae
  2. Plasmodium ovale
  3. Plasmodium falciparum (malignant malaria — can be fatal)
  4. Plasmodium vivax
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Correct answer: C. Plasmodium falciparum (malignant malaria — can be fatal)

**Plasmodium falciparum** causes **malignant (cerebral) malaria** — the most serious form, often fatal. P. vivax and P. malariae cause less severe forms. **Mosquito vector:** **female Anopheles**.

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