Board Exam Practice — Life Processes

Grade 10 Science — Board Exam Practice — Life Processes: 25 practice questions with instant scoring and explanations.

1. The main function of chloroplasts is:
2. Which product is NOT produced during photosynthesis?
3. The site of cellular respiration in the mitochondria is:
4. How many ATP molecules are produced per glucose in aerobic respiration?
5. The enzyme that catalyzes the breakdown of starch is:
6. Which process does NOT require energy?
7. The end product of anaerobic respiration in humans is:
8. Which of the following is an exergonic reaction?
9. The light-dependent reactions occur in which part of the chloroplast?
10. Which statement about enzymes is true?
11. The rate of enzyme activity is LEAST affected by:
12. What is the RQ (respiratory quotient) for carbohydrate metabolism?
13. In photosynthesis, the Calvin cycle produces:
14. Which is the first stable product of photosynthesis?
15. The enzyme pepsin is secreted by:
16. Which enzyme breaks peptide bonds?
17. The process of moving glucose against concentration gradient is:
18. What is the main function of mitochondria?
19. The number of ATP produced in Krebs cycle per acetyl-CoA is:
20. Which is a co-enzyme used in cellular respiration?
21. The optimum pH for pepsin is:
22. Which stage of respiration produces the most ATP?
23. The function of the cristae in mitochondria is to:
24. Which gas is essential for aerobic respiration?
25. The coenzyme NAD⁺ accepts electrons to become: