1. The ultimate electron acceptor in an aerobic respiraton is:
a) Oxygen
b) Cytochrome
c) Hydrogen
d) Glucose
Answer
Ans.(a)
2. Phosphrylation of glucose during glycolysis is catalysed by :
a) Phosphoglucomutase
b) Phosphoglucoisomerase
c) Hexokinase
d) Phosphorylase
Answer
Ans.(d)
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
Answer
Ans.(b)
4. Electron transport chain (ETS) is located in mitochondrial:
a) Outer membrane
b) intermembranal space
c) Inner membrane
d) matrix
Answer
Ans.(b)
5. Which of the following has highest rate of photosynthesis:
a) Leaf bud
b) Growing shoot apex
c) Root tip
d) Growing root tip
Answer
Ans.(b)
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.
Answer
Ans.(b)
7. The end product of oxidative phosphorylation is:
a) NADPH
b) Oxygen
c) ADP
d) ATP + H2O
Answer
Ans.(d)
8. Match of the two columns are given below,which one is the correct match:
COLUMN A COLUMN B
A MOLECULAR OXYGEN i α-KETOGLUTARIC ACID
B ELECTRON ACCEPTOR ii HYDROGEN ACCEPTOR
C PYRUVATE DEHDROGENASE iii CYTOCHROME
D DECARXYLATION iv ACETYL COA
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
Answer
Ans.(a)
9. Respiratry quotient of FATS is :
a) equal to 1
b) more than 1
c) less than 1
d) none of the above.
Answer
Ans.(c)
10. Red muscle fibre are red due to the presence of:
a) haemoglobin
b) myoglobin
c) megaloglobin
d) rich no. of RBC
Answer
Ans.(c)
11. Nature of TCA cycle is:
a) Catabolic
b) Metabolic
c) Amphibolic
d) Anabolic
Answer
Ans.(c)
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
Answer
Ans.(c)
13. Which of the following does not function as an electron carrier?
a) Coenzyme-Q
b) Cytochrome-a
c) Cytochrome-C
d) H2O
Answer
Ans.(d)
14. The process used to convert pyruvate to acetyl CoA is
a) Oxidative dehydration
b) Oxidative decarboxylation
c) Oxidative dehydrgenation
d) Oxidative dephosphorylation
Answer
Ans.(b)
15. Which of the following plant part can respire anaerobically:
a) Root
b) Seed
c) Stem
d) leaves
Answer
Ans.(b)
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
Answer
Ans.(c)
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
Answer
Ans.(c)
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.
Answer
Ans.(d)
19. The net gain of ATP during glycolysis is:
a) Six
b) Two
c) Eight
d) Four
Answer
Ans.(b)
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
Answer
Ans.(b)
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
Answer
Ans.(b)
22.Which of the following enzyme is not used in Kreb’s cycle?
a) Aconitase
b) Decarboxylase
c) Aldolase
d) Fumarase
Answer
Ans.(c)
23. The end products of fermentation are:
a) ATP
b) Ethanol+ CO2 + ATP
c) Ethyl alcohol + H2O+ CO2 + ATP
d) Pyruvic acid + CO2
Answer
Ans.(b)
24. Anaerobic respiration in muscles give rise to the following:
a) C3H6O3
b) CH3COOH
c) C2H5OH
d) CH3COCOOH
Answer
Ans.(d)
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
Answer
Ans.(c)
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
Answer
Ans.(d)
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
Answer
Ans.(a)
28. Mitochondria are semi-autonomous because as they posses:
a) DNA
b) DNA + RNA
c) DNA + RNA ribosome
d) Protein
Answer
Ans.(c)
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
Answer
Ans.(b)
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
Answer
Ans.(d)
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.
A. B. C. D.
Answer
Ans.(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
Answer
Ans.(A)
33. Phos[phorylation of glucose during glycolysis is catalysed by :
a) Phosphoglucomutase
b) Phosphoglucoisomerase
c) Hexokinase
d) Phosphorylase
Answer
Ans.(C)
34. Intermediate stage between aerobic and anaerobic cycles is:
a) Gloxylate cycle
b) Glycolysis
c) Krebs cycle
d) None of these
Answer
Ans.(b)
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
Answer
Ans.(b)
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
Answer
Ans.(a)
37. For undergoing glycolysis ,glusose require priming with the help of ATP:
a) 1
b) 2
c) 3
d) 4
Answer
Ans.(b)
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.
Answer
Ans.(c)
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
Answer
Ans.(a)
40. The last electron acceptor of ETC during oxidative phosphorylation is:
a) Cyt b
b) Cyt a3
c) H2
d) CO2
Answer
Ans.(b)
41. R.Q. of protein is :
a) 7
b) 1.0
c) 9
d) more than one.
Answer
Ans.(c)
42. Which of the following carbon is anomeric in glucose:
a) C 1
b) C 2
c) C 4
d) C 5
Answer
Ans.(a)
43. Glycolysis term has originated from greek word :
a) Glycose and lysis
b) Glycos and lysis
c) Glyco and lysis
d) Glycose and lysis
Answer
Ans.(b)
44. The cofactor of nitrate reductase is :
a) Cu
b) Zn
c) Ca
d) Mo
Answer
Ans.(d)
45. Which process makes direct use of oxygen ?
a) Glycolysis
b) Fermentation
c) Electron transport
d) Kreb’s cycle
Answer
Ans.(c)
46. Dough kept overnight in warm place becomes soft and spongy due to:
a) Osmosis
b) Absorption of CO2
c) Cohesion
d) fermentation
Answer
Ans.(d)
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
Answer
Ans.(d)
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
Answer
Ans.(a)
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
Answer
Ans.(c)
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.
Answer
Ans.(a)
