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: Respiratory System →

1. Which vitamin complex includes thiamine, niacin and riboflavin?Asked in Section Officer(LDCE) 2021 22 2021 · UPSC NDA 1 2018
2. Vocal Cords occur inAsked in WBCS Main Paper 4 2023
3. Pneumonia is an infection ofAsked in BPSC Prelims Exam 67th Cancelled
4. After a person quits smoking, the lungs can heal to a certain extent, because of ______.Asked in KPSC KAS Prelims 2017
5. Aquatic animals breathe much faster than terrestrial animals because of :Asked in UPSC CAPF 2009
6. How do marine animals survive in water without air contact?Asked in UPSC CAPF 2012
7. Which one among the following animals can perform respiration either through gills or through lungs ?Asked in UPSC CISF AC EXE 2021
8. Which one of the following organs is the main respiratory organ of whale?Asked in WBPSC CS Prelims 2018
9. Which of the following statements is/are correct? 1. Dolphins and Whales breathe through blowholes. 2. Earthworm breathe through their skin. Select the correct answer from the code given below : Code : (a) Only 2 (b) Both 1 and 2 (c) Neither 1 nor 2 (d) Only 1Asked in uppsc 2025 2025
10. Site of gaseous exchange in lungs isAsked in UPPCS Prelims 2021
11. During respiration in human beings, the actual place of gaseous exchange isAsked in UPSC CAPF 2020
12. Amount of which of the following components in air does not change in the process of respirationAsked in RPSC RAS Prelims 2003
13. Which cells of our body can not respire anaerobically?Asked in District Statistical Officer Assistant Director 2025
14. What is the Respiratory Quotient (RQ) value of carbohydrates ?Asked in Co operative Supervisor & Environment Supervisor (Group C) Exam 2023
15. During expiration the air will leave the lungs when the pressure inside the lungs must becomeAsked in HAS Prelims 2021
16. Pressure within the lungs is calledAsked in WBCS Main Paper 4 2023
17. Which part of the brain controls breathing?Asked in lower devision clerk 2025
18. How much air does a man normally inhale in a day?Asked in WBCS Main Paper 4 2022
19. During normal respiration in a mammal, the diaphragm is :Asked in Paper I 4
20. Match the following : Respiratory Pigment Animal/Animal group a. Haemoglobin I. Annelida b. Chlorocruorin II. Vertebrates c. Hemerythrin III. Lingula d. Haemocyanin IV. MolluscsAsked in MPSC CS Prelims 2019
21. Which among the following is not involved in Respiratory Process ?Asked in MPSC CS Prelims 2021
22. Which one of the following is not an intermediate step in Respiration ?