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UPSC CDS Organisations — practice questions

Explore 30 free Organisations questions in UPSC CDS Science. Open each question or exercise to read its content, reference answers and available explanation.

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Organisations questions and exercises with answers

Showing questions 1–30 of 30.

A patient has sustained high fever, stomach pain and constipation. Salmonella typhi is confirmed by the:Read the answer and worked solution →Mary Mallon, nicknamed Typhoid Mary, spread typhoid for years while working as a:Read the answer and worked solution →Streptococcus pneumoniae infects the alveoli causing:Read the answer and worked solution →The common cold is caused by which group of viruses?Read the answer and worked solution →The most serious, often fatal, form of malaria is caused by:Read the answer and worked solution →Malaria enters the human body as sporozoites through the bite of an infected female:Read the answer and worked solution →The chill and recurring high fever of malaria are caused by the toxic substance:Read the answer and worked solution →Entamoeba histolytica, a parasite of the large intestine, causes:Read the answer and worked solution →Elephantiasis is caused by the filarial worm:Read the answer and worked solution →Ringworm, with dry scaly itchy lesions, is caused by fungi such as:Read the answer and worked solution →Which fish is introduced into ponds to eat mosquito larvae?Read the answer and worked solution →Which deadly disease has been completely eradicated by vaccination?Read the answer and worked solution →Virus-infected cells secrete proteins that protect neighbouring cells. These are:Read the answer and worked solution →Acquired immunity differs from innate immunity because it is pathogen specific and has:Read the answer and worked solution →An antibody molecule has how many peptide chains?Read the answer and worked solution →Colostrum protects a newborn because it is rich in antibodies of type:Read the answer and worked solution →Allergic reactions are due to release of histamine and serotonin from:Read the answer and worked solution →Rheumatoid arthritis is an example of a disease that is:Read the answer and worked solution →The primary lymphoid organs where lymphocytes mature are bone marrow and the:Read the answer and worked solution →HIV belongs to a group of viruses called:Read the answer and worked solution →The widely used diagnostic test for AIDS is:Read the answer and worked solution →The most feared property of malignant tumours, spreading to distant sites, is:Read the answer and worked solution →Catch the bacterial diseasesRead the answer and worked solution →Pop the innate barriersRead the answer and worked solution →Run the pathogensRead the answer and worked solution →Slice the disease wordsRead the answer and worked solution →Active or passive immunityRead the answer and worked solution →Sort the drug sourcesRead the answer and worked solution →Type the numberRead the answer and worked solution →Health and disease bingoRead the answer and worked solution →

Worked practice questions

A patient has sustained high fever, stomach pain and constipation. Salmonella typhi is confirmed by the:

  1. Widal test
  2. ELISA test
  3. Biopsy test
  4. Mantoux test
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Correct answer: A. Widal test

1. Salmonella typhi causes typhoid. 2. The Widal test confirms it. 3. Typhoid Mary was a famous carrier. _Source: syllabus Biology, Chapter 8, Human Health and Disease._

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Mary Mallon, nicknamed Typhoid Mary, spread typhoid for years while working as a:

  1. Nanny
  2. Cook
  3. Nurse
  4. Tailor
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Correct answer: B. Cook

1. She was a carrier with no symptoms. 2. She spread typhoid through food she cooked. 3. It is a classic case in medicine. _Source: syllabus Biology, Chapter 8, Human Health and Disease._

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Streptococcus pneumoniae infects the alveoli causing:

  1. Pneumonia
  2. Typhoid
  3. Diphtheria
  4. Dysentery
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Correct answer: A. Pneumonia

1. Haemophilus influenzae also causes it. 2. The alveoli fill with fluid. 3. It spreads through droplets and shared utensils. _Source: syllabus Biology, Chapter 8, Human Health and Disease._

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