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AP EAMCET Zoology Unit 6: Biology in Human Welfare — practice questions

Explore 83 free Zoology Unit 6: Biology in Human Welfare questions in AP EAMCET Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Zoology Unit 6: Biology in Human Welfare questions and exercises with answers

Showing questions 1–30 of 83.

Which bacterium is the cause of typhoid fever in humans?Read the answer and worked solution →Which test is used to confirm typhoid fever?Read the answer and worked solution →Mary Mallon, known as Typhoid Mary, spread typhoid for years as a cook who was what?Read the answer and worked solution →In pneumonia, which lung structures become filled with fluid?Read the answer and worked solution →Which group of viruses is responsible for the common cold?Read the answer and worked solution →Which protozoan genus causes malaria?Read the answer and worked solution →Which Plasmodium species causes the most serious, often fatal, malignant malaria?Read the answer and worked solution →In which infectious form does Plasmodium enter the human body?Read the answer and worked solution →Which toxic substance released on rupture of RBCs causes the chill and high fever of malaria?Read the answer and worked solution →Where do Plasmodium parasites first multiply after entering the human body?Read the answer and worked solution →Which insect is the vector that transmits the malarial parasite?Read the answer and worked solution →Which protozoan parasite living in the large intestine causes amoebic dysentery?Read the answer and worked solution →What acts as a mechanical carrier of Entamoeba histolytica to food?Read the answer and worked solution →Filariasis, or elephantiasis, is caused by which organism?Read the answer and worked solution →Which genera of fungi are responsible for ringworm?Read the answer and worked solution →Ringworm fungi thrive best under which conditions?Read the answer and worked solution →Stomach acid, saliva and tears are examples of which innate barrier?Read the answer and worked solution →Which proteins secreted by virus-infected cells protect non-infected cells?Read the answer and worked solution →Which is the main physical barrier preventing entry of microorganisms?Read the answer and worked solution →Which feature distinguishes acquired immunity from innate immunity?Read the answer and worked solution →Which immune response, stronger than the primary one, follows a second exposure to the same pathogen?Read the answer and worked solution →Which cells produce antibodies in response to pathogens?Read the answer and worked solution →How many peptide chains does one antibody molecule contain?Read the answer and worked solution →Which of these is NOT a type of antibody?Read the answer and worked solution →Which cells mediate the cell-mediated immune response?Read the answer and worked solution →Which immune response is responsible for rejection of transplanted grafts?Read the answer and worked solution →Active immunity is produced when the host body does what?Read the answer and worked solution →The yellowish fluid colostrum is rich in which antibody?Read the answer and worked solution →Transfer of antibodies from mother to foetus through the placenta is an example of what?Read the answer and worked solution →On which property of the immune system is vaccination based?Read the answer and worked solution →

Worked practice questions

Which bacterium is the cause of typhoid fever in humans?

  1. Vibrio cholerae
  2. Salmonella typhi
  3. Shigella dysenteriae
  4. Clostridium tetani
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Correct answer: B. Salmonella typhi

Typhoid is caused by Salmonella typhi, which enters the small intestine through contaminated food and water.

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Which test is used to confirm typhoid fever?

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

Typhoid is confirmed by the Widal test, which detects antibodies against the typhoid bacterium.

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Mary Mallon, known as Typhoid Mary, spread typhoid for years as a cook who was what?

  1. A healthy carrier
  2. A mosquito vector
  3. A secondary host
  4. An immune person
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Correct answer: A. A healthy carrier

She carried the bacterium without being cured and contaminated the food she prepared, so she was a typhoid carrier.

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