20. Which of the following are raw materials for cellular respiration?
A. Water and carbon dioxide
B. Carbon dioxide and sugar
C. Sugar and oxygen
D. Oxygen and water

21. Which of the following is true about the electron transport chain?
i. NADH is split into NAD and H2
ii. It produces 36 ATPs
ili. It is the last stage of cellular respiration iv. Oxygen is the last electron acceptor

A. i, ii and iii only C. i, iii and iv only
B. ii, iii and iv only D. i, ii, iii and iv only

22. In which of the following will electron transport chain occur?
A. Cytoplasm
B. Inner membrane of mitochondria
C. Matrix of mitochondria
D. Chloroplast

23. Which of the following is the main product of glycolysis?
A. Oxygen C. Glucose
B. NADPH D. Pyruvic acid

24. What is the correct sequence of steps of cellular respiration?

A. Krebs cycle, glycolysis, ET chain
B. ET Chain, Krebs cycle, glycolysis
C. Glycolysis, Krebs cycle, ET chain
D. Glycolysis, Calvin cycle, ET chain

25. Which of the following is correctly paired?

A. Glycolysis; mitochondrial matrix
B. Kreb's cycle; cytoplasm
C. Electron transport chain; cristae
D. Glycolysis; chloroplast​