Biology questions with answers

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

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1. The Xylem in plants is responsible for –Asked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023 · MPSC CS Prelims 2019
2. Which of the following is C4 plant?Asked in UPPSC Upper Mains 2014
3. Plants prepare glucose in the process of :Asked in UPSC CDS 1 2022
4. In photosynthesisAsked in CGPSC Prelims Exam 2017
5. Direction to the following two questions (Q. Nos. 29 & 30). Read the two statements Assertion (A) & Reason (R). Choose the correct answer from the four choices (a), (b), (c) or (d) as given below : Statement-I (A) : The Process of energy conversion from Solar heat energy to Chemical energy is known as photosynthesis. Statement-II (R) : Autotrophs use Solar energy to convert carbon dioxide and water to produce carbohydrates and finally other biochemical molecules to support life.Asked in KPSC KAS Prelims 2014
6. The sunlight energy used by green plants in photosynthesis is transformed intoAsked in MPPSC CS Prelims 2018
7. The gaseous product of a process in plants is a requirement for another vital process that releases energy. Given below are four combinations of the process and product. Identify the correct answer.Asked in UPSC NDA 1 2021
8. Carbon and energy requirements of autotrophic organisms are fulfilled by:Asked in UPSC NDA 2 2015
9. Green plant commonly :Asked in OPSC CS Prelims 2015
10. Which one of the following is the process involved in photosynthesis?Asked in OPSC CS Prelims 2023 · UPSC IAS 2014
11. Plants capable of performing photosynthesis belong to which one among the following types of organisms?Asked in UPSC CAPF 2013
12. Consider the following statements describing the functions of plants : 1. Photosynthesis is a process to convert light energy from the Sun into chemical energy i.e., Carbohydrates are synthesized from carbon dioxide and water using sun light 2. Fermentation or Zymology is a metabolic process that converts carbohydrate to alcohols and carbon dioxide Which of the statements given above is/are correct ?Asked in UPSC CAPF 2014
13. If all the plants and trees vanish from the earth, the gas which will decreases is:Asked in RPSC RAS Prelims 2012
14. Which of the following substances is produced during photosynthesis in plant leaves?Asked in Assistant Engineer (Civil) 2018 19 2018
15. Given below are two Statements, one is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : In photosynthesis, the radiation energy of sunlight is converted into chemical energy and stored in food materials. Reason (R) : The final product of photosynthesis is glucose sugar, which soon turns into starch. Select the correct answer using the codes given below :Asked in RO ARO pre 2023
16. Plant prepares their food byAsked in TOURIST INFORMATION OFFICER(TIO) 2017
17. A leaf was plucked from a plant on a sunny day and kept for 2 minutes in boiling water. It was subsequently immersed in boiling alcohol and treated with iodine solution. What will be the final colour of the leaf after the test?Asked in UPSC CDS 1 2023
18. Which one of the following is NOT a requirement for photosynthesis ?Asked in UPSC NDA 2 2023
19. The point at which the rate of photosynthesis is equal to the rate of respiration is calledAsked in ASO 2025
20. Which is not required for photosynthesis ?Asked in Combined (Group C) Exam 2023
21. Which one of the following statements about the process of photosynthesis is correct ?Asked in UPSC CDS 2 2022 · UPSC NDA 2 2021
22. Which of the following processes does not take place during photosynthesis ?Asked in HPPSC HPAS Prelims 2016
23. फोटोͧसंथेͧसस एक प्रͩक्रया है जो ͩक हǐरत पादपों को उनके भोजन का ͧसंथेसाइज करने में मदद करती है। घटनाओं का सोपानी पात तथा के ͧमकल अͧभͩक्रयाएँ एक ͪवͧशष्ट अनुक्रम में होती हैं। उस घटना का चयन कीǔजए जो फोटोͧसंथेͧसस में नहीं होती है।Asked in HAS Prelims 2021
24. Photosynthesis is a process that helps green plants synthesize their food. A cascade of events and chemical reactions take place in a specified sequential order. Choose an event that does not take place in photosynthesis.Asked in HAS Prelims 2021
25. What is the principal function of the light- dependent reactions of photosynthesis ?Asked in MPSC CS Prelims 2023