MDCAT XII Biology Gaseous Exchange + Bioenergetics Online Test-2

1. Before entering the Krebs cycle, pyruvate undergoes which processes?

2. How many ATP molecules are formed during substrate level phosphorylation in Krebs cycle when one molecule of glucose is consumed.

3. How many carbon atoms are fed into the citric acid cycle as a result of the oxidation of one molecule of pyruvate?

4. The oxygen consumed during cellular respiration is involved directly in which process or events?

5. How many ATP molecules are formed during substrate level phosphorylation in Krebs cycle when one molecule of glucose is consumed.

6. Before entering the Krebs cycle, pyruvate undergoes which processes?

7. How many ATP molecules are utilized during glycolysis?

8. The enzymes required for glycolysis are located in the:

9. In the electron transport chain, the carrier molecules are first _ and then _.

10. The end products formed by yeast during anaerobic respiration are:

11. The end product of glycolysis under anaerobic conditions is:

12. The total number of ATP molecules produced during aerobic respiration is:

13. The net ATP yield at the end of glycolysis is:

14. The quantitative study of energy relationships and energy transformations in living systems is called:

15. The process in which pyruvate is converted into three molecules of CO₂ is known as:

16. The process of the electron transport chain takes place in the:

17. The synthesis of ATP during the electron transport chain in the presence of oxygen is referred to as:

18. Identify the correct sequence of substances reduced and oxidized in the following order:

1. Cytc

2. Cytb

3. Cyta
4. Cyta3

19. Complete oxidation of one molecule of glucose requires how many cycles of the Krebs cycle?

20. ATP formation occurs during which of the following steps?

21. Which of the following statements is NOT correct?

22. The type of anaerobic respiration in which pyruvate is directly converted into lactate is called:

23. Which of the following represents the oxidative phase of glycolysis?

24. Select the correct descending sequence for the following intermediates:

1. Fructose-6-P

2. Fructose-1,6-diP

3. Glucose

4. Glucose-6-P

5. G3P

25. The anaerobic conversion of glucose into two molecules of pyruvate is known as:

26. Fermentation was defined by:

27. The breakdown of glucose through a redox reaction pathway for the synthesis of ATP is termed:

28. Maxillary sinus is located:

29. Which one of the following is correct?

30. Abnormal proliferation of affected tissue in the lungs:

31. During swallowing, epiglottis is forced into a more or less horizontal position by:

32. The exchange of gases in alveoli occurs through:

33. Breathing mechanism is controlled by:

34. Haemoglobin can increase the oxygen-carrying capacity of blood to about:

35. The amount of residual volume can be changed due to:

36. How many percent of O₂ gets dissolved and transported through blood plasma?

37. Volume remaining in lungs after normal exhalation is:

38. Vital capacity is:

39. Which one of the following is not an accessory component of the respiratory system?

40. Trachea has about ___ C-shaped cartilaginous rings which provide rigidity and prevent it from collapsing:

41. The muscular tube which serves as a common pathway for both the respiratory and digestive systems:

42. Which one of the following is correct?

43. How many percent of CO₂ is transported by RBCs in water?

44. Which one of the following is correct?

45. The major functions of the respiratory system:

46. The adult normal breathing rate is about how many times per minute?

47. In human adults, lung capacity is:

48. Which one of the following is not correct regarding inspiration?

49. ___ volume remains in the lung (about 1000 ml) and does not allow the thorax to collapse:

50. Vital volume is the maximum air inspired and expired during deep breath, which is: