1. The ultimate electron acceptor in an aerobic respiraton is:

a) Oxygen

b) Cytochrome

c) Hydrogen

d) Glucose

2. Phosphrylation of glucose during glycolysis is catalysed by :

a) Phosphoglucomutase

b) Phosphoglucoisomerase

c) Hexokinase

d) Phosphorylase

3. Pyruvic acid the key product of glycolysis has many fates; what  are its products  during aerobic respiration.

a) Lactic acid

b) CO2 + H2O

c) Acetyl CO A + H2O

d) Ethanol + CO2

4. Electron transport chain (ETS) is located in mitochondrial:

a) Outer membrane

b) intermembranal space

c) Inner membrane

d) matrix

5. Which of the following has highest rate of photosynthesis:

a) Leaf bud

b) Growing shoot apex

c) Root tip

d) Growing root tip

6. Mitochondria is called the powerhouse of cell because:

a) It has mitochondral enzyme for kreb’s cycle and cytochromes.

b) It produces ATP as energy store house.

c) It is found in all plant and animal cell

d) It has double membrane.

7. The end product of oxidative phosphorylation is:

a) NADPH

b) Oxygen

c) ADP

d) ATP + H2O

8. Match of the two columns are given below,which one is the correct match:

a) A-ii,B-iii,C-iv,D-i

b) A-iii,B-iv,C-ii,D-i

c) A-ii,B-i,C-iii,D-iv

d) A-iv,B-iii,C-i,D-ii

9. Respiratry quotient of FATS is :

a) equal to 1

b) more than 1

c) less than 1

d) none of the above.

10. Red muscle fibre are red due to the presence of:

a) haemoglobin

b) myoglobin

c) megaloglobin

d) rich no. of RBC

11. Nature of TCA cycle is:

a) Catabolic

b) Metabolic

c) Amphibolic

d) Anabolic

12. The number of glucose molecule required to produce 38 ATP molecules under anaerobic condition by a yeast cell is:

a) 2

b) 4

c) 19

d) 38

13. Which of the following does not function as an electron carrier?

a) Coenzyme-Q

b) Cytochrome-a

c) Cytochrome-C

d) H2O

14. The process used to convert pyruvate to acetyl CoA is

a) Oxidative dehydration

b) Oxidative decarboxylation

c) Oxidative dehydrgenation

d) Oxidative dephosphorylation

15. Which of the following plant part can respire anaerobically:

a) Root

b) Seed

c) Stem

d) leaves

16. How many ATP molecules could maximally generated from one molecule of glucose,if the complete oxidatin of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal ?

a) One

b) Two

c) Thirty

d) Fifty seven

17. All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in the  inner mitochondrial membrane in the eukaryotes and in the cytosol in prokaryotes. This enzyme is :

a) isocitrate dehydrogenase

b) Malate dehydrogenase

c) Sucinnic dehydrogenase

d) Lactate dehydrogenase

18. The overall aim of glycolysis, Kreb’s cycle and ETS is:

a) production of ATP on large scale

b) Nucleic acid

c) Sugars

d) production of ATP in small stepwise units.

19. The net gain of ATP during glycolysis is:

a) Six

b) Two

c) Eight

d) Four

20. Which one is not correct about Kreb’s cycle?

a) It is also called citric acid cycle.

b) The intermediate compound which link kreb’s cycle and glycolysis is Malic acid.

c) It occurs in mitochondria

d) It starts with six carbon compound

21. In which of the following steps of Kreb’s cycle CO2 is evovled?

a) Isociric acid / Oxalosuccinic acid

b) Oxalo succinic acid  / α-Ketogluteric acid

c) succinic acid / Fumaric acid

d) Malic acid / Oxaloacetic acid

22.Which of the following enzyme is not used in Kreb’s cycle?

a) Aconitase

b) Decarboxylase

c) Aldolase

d) Fumarase

23. The end products of fermentation are:

a) ATP

b) Ethanol+ CO2 + ATP

c) Ethyl alcohol + H2O+ CO2 + ATP

d) Pyruvic acid + CO2

24. Anaerobic respiration in muscles give rise to the following:

a) C3H6O3

b) CH3COOH

c) C2H5OH

d) CH3COCOOH

25. RQ (Respiratory quotient ) is defined as :

a) Volume of CO2 evolved = Volume of O2 consumed

b) Volume of CO2 consumed / Volume of O2 evolved

c) Volume of CO2 evolved / Volume of O2 consumed

d) Volume of O2 evolved / Volume of CO2 consumed

26. In which of the following CO2 is not evolved:

a) Aerobic resoiration in plants

b) Aerobic respiration in animals

c) Alcoholic fermentation

d) Lactate fermentation

27. The three boxes in this diagram represents the three major biosynthetic Pathway s in aerobic Respiration:

a) ATPArrows represent net reactants and products, Arrows no. 4, 8 and 12 are :

b) H2O

c) FADH2 OR FAD+

d) NADH

28. Mitochondria are semi-autonomous because as they posses:

a) DNA

b) DNA + RNA

c) DNA + RNA ribosome

d) Protein

29. FAD is the electron acceptor in between :

a) Fumaric acid and Malic acid

b) Fumaric acid and Succinic acid

c) Malic acid and oxaloacetic acid

d) Citric acid and isocitric acid

30. The energy releasing metabolic reaction in which substrate is oxidised without an external electron Acceptor is called:

a) Photorespiration

b) Aerobic respiration

c) Glycolysis

d) Fermentation

31. The following question consists of two statements each : assertion A and reasons ( R) .To answer  these questions, mark the correct alternative as directed below:

If both A and R are true and R is the correct explaination of A

If both A and R are true and R is the correct explaination of A

If  A is truebut R is false.

If both A and R are false.

Assertion :  All the enzymes participating in the Krebs cycle reactions occur in the matrix of Mitochondria.

Reason: Krebs cycle generates GTP in animal well as plant cells.

B.           C.                 D.

32. Most enzymes that take part in KREBS CYCLE are located in:

a) Mitochondrial matrix

b) Cytoplasm

c) Inner mitochondrial membrane

d) Plasma membrane

33. Phos[phorylation of glucose during glycolysis is catalysed by :

a) Phosphoglucomutase

b) Phosphoglucoisomerase

c) Hexokinase

d) Phosphorylase

34. Intermediate stage between aerobic and anaerobic cycles is:

a) Gloxylate cycle

b) Glycolysis

c) Krebs cycle

d) None of these

35. The size of mitochondria inplant cell is:

a) 0.1 – 1.0 µm long

b) 1.0 – 4.0 µm long

c) 2.0 – 4.0 µm long

d) 0 – 4.0 µm long

36. In which of the following reaction related to plant peroxisomes are envolved:

a) Gloxylate cycle

b) Glycolate cycle

c) Krebs cycle

d) Bacterial respiration

37. For undergoing glycolysis ,glusose require priming with the help of ATP:

a) 1

b) 2

c) 3

d) 4

38. Which among the following is the most appropriate reason for storing green coloured apples at low temperature?

a) The rate of photosynthesis is reduced

b) Respiration and photosynthesis are completely inhibited

c) The rate of respiration is reduced

d) The rates of photosynthesis and respiration are reduced.

39. A net gain of glycolysis with a molecule of glucose is the formation of:

a) 2NADH 2, 2ATP and 2 pyruvic acid molecules

b) 2NADH 2, 2ATP and 1 pyruvic acid molecules

c) 1NADH 2, 2ATP and 2 pyruvic acid molecules

d) 2NADH 2, 4 ATP and 2 pyruvic acid molecules

40. The last electron acceptor of ETC during oxidative phosphorylation is:

a) Cyt b

b) Cyt a3

c) H2

d) CO2

41. R.Q. of protein is :

a) 7

b) 1.0

c) 9

d) more than one.

42. Which of the following carbon is anomeric in glucose:

a) C 1

b) C 2

c) C 4

d) C 5

43. Glycolysis term has originated from greek word :

a) Glycose and lysis

b) Glycos and lysis

c) Glyco and lysis

d) Glycose and lysis

44. The cofactor of nitrate reductase is :

a) Cu

b) Zn

c) Ca

d) Mo

45. Which process makes direct use of oxygen ?

a) Glycolysis

b) Fermentation

c) Electron transport

d) Kreb’s cycle

46. Dough kept overnight in warm place becomes soft and spongy due to:

a) Osmosis

b) Absorption of CO2

c) Cohesion

d) fermentation

47. Chemiosmotic theory of ATP synthesis in chloroplasts and mitochondria is based on:

a) Membrane potential

b) Accumulation of Na+ ions

c) Accumulation of K+ ions

d) Proton gradient

48. The process by which ATP is produced in the inner membrane of a mitochondrion. The electron transport system transfers from the inner compartment to the outer, as the proton flow back to the inner compartment, the energy of thgeir movement is used to add phosphate to ADP , forming ATP,

a) Chemiosmosis

b) Phosphorylation

c) Glycolysis

d) Fermentation

49. In photophorylation ,under the circumstances when NADP is not longer available as acceptor the electrons are passed to :

a) Cytochrome f

b) Plastocyanin

c) Cytochrome B6

d) Quinone

50 In citric acid cycle, the step which is not mediated by dehydrogense enzyme is :

a) Oxaloacetic acid to citric acid

b) Citric acid to α-keto glutaric acid

c) Succinic acid to fumaric acid

d) malic acid to oxaloacetic acid.

      ANSWERS

1. a) Oxygen
2. d) Phosphorylase
3. b) CO2 + H2O
4. b) intermembranal space
5. b) Growing shoot apex
6. b) It produces ATP as energy store house.
7. d) ATP + H2O
8. a) A-ii,B-iii,C-iv,D-i
9. c) less than 1
10. c) megaloglobin
11. c) Amphibolic
12. c)-19
13. d)-H2O
14. b)- Oxidative decarboxylation
15. b) –Seed
16. c) –Thirty
17. c) –Succinic dehydrogenase
18. d) – ATP production in small stepwise units.
19. b)-Two
20. b)- The intermediate compound which link kreb’s cycle and glycolysis is Malic acid.
21. b) – Oxalosuccinic acid                   α-Ketogluteric acid
22. c) -Aldolase

23. b) -Ethanol+ CO2 + ATP
24. d)- CH3COCOOH
25. c) Volume of CO2 evolved / Volume of O2 consumed
26. d) Lactate fermentation
27. a) ATP
28. c) DNA + RNA ribosome
29. b) Fumaric acid and Succinic acid
30. d) Fermentation
31. D
32. a) Mitochondrial matrix
33. c) Hexokinase
34. b) Glycolysis
35. b) 1.0 – 4.0 µm long
36. a) Gloxylate cycle
37. b) 2
38. c) The rate of respiration is reduced.
39. a) 2NADH 2 , 2ATP and 2 pyruvic acid molecules
40. b) Cyt a3
41. c) 0.9
42. a) C 1
43. b) Glycos and lysis
44. d) Mo
45. c) Electron transport
46. d) Fermentation
47. d) Proton gradient
48. a) Chemiosmosis
49. c) Cytochrome B6
50. a) Oxaloacetic acid to citric acid