9th class Biology Chapter no.7 MCQs
Unit no.7 MCQs of 9th Class Biology
Bioenergetics:
1. The loss of electrons is called:
a. Oxidation
b. Reduction
c. Electrolysis
d. Hydration
2. Which of the following contains high amount of energy?
a. ADP
b. AMP
c. ATP
d. All
3. ATP was discovered by:
a. Karl Lohmann
b. Fritz Lipmann
c. Hans Krels
d. Calvin
4. ATP is an example of a/an
a. Nucleic acid
b. Amino acid
c. Nucleotide
d. Fatty acid
5. When was ATP discovered?
a. 1929
b. 1909
c. 1939
d. 1919
6. Number of phosphate groups in ATP molecules is:
a. Four
b. Tow
c. Five
d. Three
7. Adenine is nitrogenous based with:
a. Triple ring
b. Single ring
c. Straight chain
d. Double ring
8. How many ATP molecules are produced by a NADH in electron transport chain?
a. Three
b. One
c. Four
d. Tow
9. One mole of ATP releases energy:
a. 7.3 k cal
b. 7.8 k cal
c. 7.14 k cal
d. 7.9 k cal
10. In which component of the leaf cells, chlorophyll is present?
a. Thylakoids
b. Struma
c. Cytoplasm
d. Plasma membrane
11. In which of the following metabolic processes, oxidation as well as reduction of molecules occur?
a. Respiration
b. Photosynthesis
c. Both A and B
d. None of these
12. Chlorophyll pigment absorbs maximum light in wavelengths of:
a. Green only
b. Green and blue
c. Red and blue
d. Green and red
13. Regulate the opening and closing of stoma:
a. Sulphur
b. Calcium
c. Potassium
d. Phosphorus
14. Calvin got Noble prize in:
a. 1985
b. 1961
c. 1991
d. 1971
15. Guard cells belong to:
a. Cortex
b. Pericycle
c. Endodermis
d. Stomata
16. Stomata cover the leaf surface only:
a. 1-2%
b. 1-3%
c. 3-4%
d. 2-3%
17. ……… of the light falling on the leaf surface is absorbed, the rest is reflected:
a. 1%
b. 10%
c. 50%
d. 20%
18. In which tissues guard cells are found?
a. Epidermal
b. Mesophyll
c. Phloem
d. Xylem
19. Which tissues are the sites of photosynthesis?
a. Collenchyma
b. Trachieds
c. Sclerenchyma
d. Mesophyll
20. The important photosynthetic pigment is:
a. Chlorophyll- A
b. Carotenoids
c. Chlorophyll- AB
d. Chlorophyll- B
21. Deficiency of which element causes the yellowing of leaves in plants?
a. Cu
b. Zn
c. Mg
d. Cl
22. Raw material for photosynthesis is:
a. Glucose
b. Water and oxygen
c. Water and carbon dioxide
d. Carbon dioxide and oxygen
23. By product of photosynthesis is:
a. Nitrogen
b. Carbon dioxide
c. Oxygen
d. Carbon monoxide
24. In which part of chloroplast, light reactions of photosynthesis take place?
a. Fatty acids and glycerols
b. Outer membrane
c. Thylakoik membrane
d. Inner membrane
25. Which of the following light wavelength are more effective for photosynthesis?
a. Blue and indigo
b. Green and violet
c. Blue and green
d. Red and blue
26. Dark reactions are part of a:
a. Photosynthesis
b. Respiration
c. Metastasis
d. Necrosis
27. Dark reactions take place in:
a. Cytosol
b. Struma
c. Mitochondria
d. Thylakoid
28. The place where dark reactions are carried out is:
a. Cristac
b. Thylakoid
c. Struma
d. Matrix
29. Compounds produced during light reactions are:
a. Glucose
b. FADH
c. Sugar
d. NADPH, ATP
30. The whole series of light reactions is called:
a. L –Scheme
b. S –Scheme
c. Z –Scheme
d. None
31. Stomata close on the temperature of:
a. 30oC- 35oC
b. 10oC- 15oC
c. 40oC- 45oC
d. 20oC- 25oC
32. Taking in of food is called:
a. Ingestion
b. Absorption
c. Digestion
d. Assimilation
33. Light reactions take place in:
a. Cytosom
b. Struma
c. Mitochondria
d. Thylakoid
34. In which if the following steps of reparation CO is produced?
a. Electron transport chain
b. Glycolysis
c. Krebs cycle
d. All of these
35. Oxygen takes part in aerobic respiration in:
a. Electron transport chain
b. Glycolysis
c. Center of both A,B
d. Krebs cycle
36. From which bonds of ATP molecules energy is taken?
a. C-O bond
b. P-P bond
c. C-N bond
d. C-H bond
37. Which of these can enter into Krebs cycle?
a. Citric acid
b. Glucose
c. Acetyl Co-A
d. Pyruvic acid
38. How many molecules of CO are produced whenKrebs cycle operates once?
a. Three
b. One
c. Six
d. Tow
39. ……… is used in aerobic respiration:
a. Light
b. Oxygen
c. Nitrogen
d. Carbon dioxide
40. The example of three carbon molecules is:
a. Starch
b. Glucose
c. Ribose
d. Pyruvic acid
41. Glycolysis takes place in:
a. Mitochondria
b. Nucleus
c. Ribosomes
d. Cytoplasm
42. Aerobic respiration occurs in:
a. Cytoplasm
b. Mitochondria
c. Lysosomes
d. Plastids
43. In which stage of respiration carbon dioxide gas is produced?
a. Electron transport chain
b. Glycolysis
c. Krebs cycle
d. None
44. How many carbon atoms are present in pyruvic acid?
a. Four
b. Tow
c. Five
d. Three
45. Chemical formula of ethyl alcohol is:
a. C2 H5 OH
b. C3 H8 OH
c. D2 O
d. CH3 OH
46. One liter of ethanol weighs ……… grams.
a. 1000
b. 700
c. 789
d. 980
47. The fuel mostly used to gain energy during cellular respiration is
a. Pyruvic acid
b. Starch
c. Acetyl coenzyme A
d. Glucose
48. Fermenting abilities of bacteria are used in making:
a. Cheese
b. Soya sauce
c. Cheese and yogurt
d. Bread
49. Energy producing organelle is:
a. Ribosome
b. Nucleus
c. Mitochondria
d. Vacuole
50. The place for aerobic respiration in cell is:
a. Golgi bodies
b. Ribosome
c. Mitochondria
d. Chloroplast
52. The basic sources of energy in animals are:
a. Carbohydrates
b. Lipids
c. Nucleic acids
d. Proteins
53. During anaerobic oxidation of glucose molecule …… ATP molecules are gained as net profit:
a. Six
b. Tow
c. Eight
d. Four
54. How much carbon dioxide molecules are made in a single Kreb’s cycle?
a. Three
b. One
c. Six
d. Two
55. How many ATP molecules are formed during cellular respiration?
a. 36
b. 28
c. 40
d. 32
56. Through which process organisms get energy?
a. Photosynthesis
b. Respiration
c. Evaporation
d. Transpiration
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