Q1: 1. Which of the following is not a product of respiration in plants?

• A) Oxygen
• B) Carbon dioxide
• C) Water
• D) Glucose

Q2: 2. In which cellular organelle does respiration primarily occur in plants?

• A) Nucleus
• B) Chloroplast
• C) Mitochondria
• D) Endoplasmic reticulum

Q3: 3. What is the main purpose of respiration in plants?

• A) Absorbing sunlight
• B) Producing energy
• C) Reproducing
• D) Storing water

Q4: 4. During respiration, plants utilize which molecule to generate energy?

• A) Glucose
• B) Starch
• C) Cellulose
• D) Sucrose

Q5: 5. Which process is a part of respiration in plants?

• A) Photosynthesis
• B) Transpiration
• C) Germination
• D) Glycolysis

Q6: 6. What is the end product of glycolysis in plant respiration?

• A) Carbon dioxide
• B) Water
• C) ATP
• D) Oxygen

Q7: 7. Which environmental factor can influence the rate of respiration in plants?

• A) Temperature
• B) Soil pH
• C) Light intensity
• D) Humidity

Q8: 8. What is the role of oxygen in plant respiration?

• A) To release energy
• B) To absorb water
• C) To convert glucose
• D) To store nutrients

Q9: 9. Which stage of respiration produces the most ATP in plants?

• A) Glycolysis
• B) Krebs cycle
• C) Electron transport chain
• D) Fermentation

Q10: 10. Which type of respiration occurs in the absence of oxygen in plants?

• A) Aerobic respiration
• B) Anaerobic respiration
• C) Photosynthetic respiration
• D) Cellular respiration

Q11: 11. Which molecule is the final electron acceptor in the electron transport chain during plant respiration?

• A) Oxygen
• B) Carbon dioxide
• C) Water
• D) Glucose

Q12: 12. What is the primary function of the Krebs cycle in plant respiration?

• A) ATP production
• B) Carbon dioxide release
• C) Glucose breakdown
• D) Water absorption

Q13: 13. Which stage of respiration involves the breakdown of glucose into pyruvate?

• A) Glycolysis
• B) Krebs cycle
• C) Electron transport chain
• D) Fermentation

Q14: 14. What is the net ATP gain from one molecule of glucose during plant respiration?

• A) 2 ATP
• B) 4 ATP
• C) 36 ATP
• D) 38 ATP

Q15: 15. Which process occurs when plants respire at night?

• A) Photosynthesis
• B) Aerobic respiration
• C) Anaerobic respiration
• D) Transpiration

Q16: 16. What is the role of NADH in plant respiration?

• A) ATP synthesis
• B) Electron carrier
• C) Carbon dioxide release
• D) Glucose breakdown

Q17: 17. Which molecule serves as the initial substrate for the Krebs cycle in plant respiration?

• A) Glucose
• B) Pyruvate
• C) ATP
• D) NADH

Q18: 18. What is the primary function of the electron transport chain in plant respiration?

• A) Glucose breakdown
• B) ATP production
• C) Carbon dioxide release
• D) Water absorption

Q19: 19. Which stage of respiration generates the most carbon dioxide in plants?

• A) Glycolysis
• B) Krebs cycle
• C) Electron transport chain
• D) Fermentation

Q20: 20. How does anaerobic respiration differ from aerobic respiration in plants?

• A) It produces more ATP
• B) It requires oxygen
• C) It occurs in the mitochondria
• D) It produces lactic acid

Q21: 21. Which stage of respiration involves the transfer of electrons along the electron transport chain?

• A) Glycolysis
• B) Krebs cycle
• C) Electron transport chain
• D) Fermentation

Q22: 22. What is the role of ATP synthase in the electron transport chain during plant respiration?

• A) Electron carrier
• B) Proton pump
• C) Phosphorylation of ADP
• D) Carbon dioxide release

Q23: 23. Which stage of respiration results in the formation of ethanol or lactic acid in plants?

• A) Glycolysis
• B) Krebs cycle
• C) Electron transport chain
• D) Fermentation

Q24: 24. What is the significance of respiration in plant growth and development?

• A) Regulating water uptake
• B) Providing structural support
• C) Generating energy
• D) Facilitating photosynthesis

Q25: 25. How does the rate of respiration in plants change under low light conditions?

• A) Increases
• B) Decreases
• C) Remains constant
• D) Halts