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Biology questions with answers

2,759 multiple-choice questions. Open any question for its answer and explanation.

Questions asked in State PSC and UPSC prelims, by topic. Each topic also has notes to read.

Read the notes: Plant: Economic Importance →

  1. Pyrethrin used in mosquito coil is obtained fromAsked in UPPCS Prelims 2005
  2. Arteether, a drug to cure malaria is obtained from aAsked in UPPCS Prelims 2005
  3. Heroin is obtained fromAsked in UPPSC Upper Mains 2007
  4. Which of the following is used as a mosquito repellent ?Asked in UPPSC Upper Mains 2009
  5. Opium is obtained from which part of the poppy plant?Asked in UPPSC Upper Mains 2011
  6. Sea ,weeds are important source of which one of the following?Asked in UPPSC Upper Mains 2015
  7. Noscapine is obtained fromAsked in UPPSC Upper Mains 2012
  8. Neem tree has acquired industrial importance as a source ofAsked in UPPCS Prelims 1999
  9. Morphine is obtained from:Asked in RPSC RAS Prelims 1995
  10. Quanine, an important drug for maleria is obtained from:Asked in RPSC RAS Prelims 1996
  11. Quinine is obtained fromAsked in Additional Private Secretary Exam 2017
  12. Find the incorrect statement for algae.Asked in ASO 2025
  13. Which of the following is a medicinal plant used to treat certain type of cancers?Asked in ASO 2025
  14. Quinine is obtained from the plant'sAsked in Assistant Conservator of Forest (ACF) 2012
  15. Which of the following is an incorrect match?Asked in mineral dev officier 2025
  16. Which of the following plants is the source of Heroin (a narcotic drug) ?Asked in Forest Range Officer Exam 2012
  17. Tulsi plant has medicinal values due to the presence of the following - - Inorganic Acid - Organic Acid - Phenols and Flavonoids - Lithium BicarbonateAsked in RO ARO pre 2021
  18. Acetyl salicylic acid, an active ingredient in aspirin is derived from the bark of which tree ?Asked in Management Officer & Manager Examination 2024
  19. Which part of Cinchona plant is commonly used as a drug for malaria?Asked in Sub Inspector 2021
  20. The anti-malaria drug quinine is made from the extract of the plantAsked in TOURIST INFORMATION OFFICER(TIO) 2017
  21. Canola refers to special type of oil seed mustard varieties bred for human consumption. The main characteristic of these varieties is that theAsked in UPPCS Prelims 2000
  22. Which one of the following is not consumed as an edible oil?Asked in WBCS Main Paper 4 2022
  23. How much is the Saponin (mowrin) content in mohua oil-cake ? - Question not attemptedAsked in Asst. Fisheries Development Officer 2024
  24. RMG-62 is a variety of which crop?Asked in Food Safety Officer 2022
  25. Which of the following is a leguminous plant?Asked in J.E (Electrical 2020) 2020