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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. In which of the following stages of silkworm, silk is secreted ?Asked in Forest Range Officer Exam 2012
  2. Which of the following is not a beneficial insect ?Asked in RO ARO pre 2023
  3. What for is a cowpea crop grown ?Asked in MPSC CS Prelims 2012
  4. Where is 'Apiculture' more successful ?Asked in MPSC CS Prelims 2012
  5. Magra, formerly known as Bikaneri; also known as Bikaneri Chokhla and Chakri is a breed of : - Question not attemptedAsked in Deputy Jailor 2024
  6. Which of the following is not a breed of cattle?Asked in Sr. Teacher Gr II Comp. Exam 2
  7. Bamboo flowering is known to be associated with a subsequent famine. Which of the following is caused by bamboo flowering?Asked in Extension officer (EO) 2019
  8. Which trees are useful for Lac-culture ?Asked in MPSC CS Prelims 2012
  9. Which of the following is/are correctly matched? I. Hard resin - Cocaine II. Oleo resin - Canada balsam III. Latex - Rubber IV. Alkaloid - AsafoetidaAsked in TNPSC CS Prelims 2014
  10. Which of the following substances is obtained from a tree?Asked in UPPCS Prelims 2020
  11. The main source of natural rubber from the tree know as?Asked in APPSC Gazated Posts 2012
  12. Antimalarial drug quinine is obtained from which plant source?Asked in GPSC Prelims CSP 2 2023
  13. Iodine is obtained from :Asked in HPPSC HPAS Prelims 2010
  14. Colchicine alkaloid is obtained from _________.Asked in KPSC KAS Prelims 2017
  15. List of the species useful for the treatment of diseases : (a) Willow plant (b) Yew tree (c) Dog fish (d) Wine (Ancistrocladus korupensis) (e) Frog (Epidobates tricolor) Which species is/are used for the isolation of 'taxol' which is used for the treatment of cancer ?Asked in MPSC CS Prelims 2013
  16. List of bioactive compounds obtained from plants : (a) Nicotine - from tobacco plant (b) Nibidinc - from neem plant (c) Rotenone - from derris elliptica (d) Pyrethrum - from chrysanthemum cincrariefolium The bioactive compound extracted from plant was used by primitive people for paralysing the fish. Which of the above options was resorted to by them ?Asked in MPSC CS Prelims 2013
  17. Plants have been used as healers and health rejuvenators since times immemorial. More than half the drugs under clinical use owe their origin to plants. The Glossary of Indian Medicinal Plants lists 3000 plants. Which part of the plants is used most for medicinal properties ?Asked in MPSC CS Prelims 2015
  18. Isabgol that is used in stomach disorders is obtained fromAsked in MPSC CS Prelims 2016
  19. Which of the following plant boosts the production of red blood cells?Asked in TNPSC CS Prelims 2019
  20. Match the commonly used modern drugs with their plant sources : Drug Plant SourceAsked in TSPSC Group 1 Prelims 2024
  21. Match the following : Tree UsageAsked in TSPSC Group 1 Prelims 2022
  22. Match List I with List II and select the correct answer using the code given below the lists : List I (Product) List II (Source)Asked in UPPCS Prelims 2017
  23. Fruit. - B. Hing (Asafoetida): Derived from the dried latex (gum resin) extracted from the tap roots of several species of Ferula. Matches with 2. Root. - C. Rubber: Natural rubber is primarily obtained from the latex of the rubber tree (Hevea brasiliensis), which is collected by tapping the bark/stem. Matches with 4. Stem (latex collected from the stem/bark). - D. Quinine: An antimalarial compound extracted from the bark of the Cinchona tree (Cinchona species). Matches with 1. Bark. 72. Seaweeds are important source of -Asked in UPPCS Prelims 2023
  24. With reference to Neem tree, consider the following statements : 1. Neem oil can be used as a pesticide to control the proliferation of some species of insects and mites. 2. Neem seeds are used in the manufacture of biofuels and hospital detergents. 3. Neem oil has applications in pharmaceutical industry. Which of the statements given above is/are correct?Asked in UPSC IAS 2014
  25. Heroin is obtained from—Asked in UPPCS Prelims 2011 · UPPCS Prelims 2005