NEET Biology Chapter Wise Mock Test – Unit Test 3
1. Which of the following statements are true/false?
I. The positive hydrostatic pressure is called turgor
pressure. .
II. Wall pressure prevents the increase of protoplasm size.
111. Diffusion is more rapid in liquids than in gases.
IV. Diffusion of water through a semipermeable membrane is called imbibition.
V. Osmosis is the movement of substances, which takes place along a diffusion gradient.
(a) I and II are true, while III, IV and V are false
(b) I and III are true, while II, IV and V are false
(c) I and IV are true, while II, III and V are false
(d) I and IV are false, while II, III and IV are true
2. An unifying principle of cellular energetics, is
(a) chemiosmosis
(b) ATP hydrolysis
(c) source sink relationships
(d) water potential
3. Which of the following is an example of osmosis?
(a) Flow of water out of a cell
(b) Pumping of solutes into a cell
(c) Flow of water between cells
(d) Both (a) and (c)
4. The amount and direction of movement of water in plants can always be predicted by measuring
(a) dissolved solutes
(b) proton gradients
(c) rainfall
(d) water potential (yw)
5. Which of the following is true concerning the water potential of a plant cell?
(a) It is equal to zero when the cell is in pure water and is turgid
(b) It becomes lower after the uptake of water by osmosis
(c) It becomes higher when K+ ions are actively moved into the cell
(d) It is equal to 0.23 MPa
6. Your laboratory partner has an open beaker of pure water. By definition, the water potential (yw) of this water is
(a) not meaningful, because it is an open beaker and not plant tissue
(b) a positive number set by the volume of the beaker
(c) zero
(d) a negative number set by the volume of the beaker
7. The main mechanism(s) determining the direction of short-distance transport within a potato tuber is (are)
(a) determined by the structure and function of the tonoplast of the tuber cells
(b) diffusion due to concentration differences and bulk flow due to pressure differences
(c) not affected by temperature and pressure
(d) pressure ffpw through the phloem
8. Which of the following would have an effect on water potential in plants?
(a) Water-attracting matrices
(b) Air pressure
(c) Dissolved solutes
(d) All of these
9. Compared to a cell with few aquaporins in its membrane, a cell containing many aquaporins will
(a) have a faster rate of osmosis
(b) be less turgid
(c) have a faster rate of active transport
(d) have a lower water potential
10. Match the following columns.
Codes
A B A B
(a) 1,2 3,4 (b) 3,4 1,2
(c) 3,4 1,2 (d) 31, 2,4
11. Which of the following is a structure that might suggest that plants are a single unit rather than many individual cells?
(a) Mycorrhizae
(b) Cell wall
(c) Plasmodesmata
(d) Stomata
12. All of the following statements about xylem are correct except.
(a) Xylem conduction occurs within dead cells
(b) Xylem has a lower water potential
(c) Xylem conducts material upward
(d) Xylem transports mainly sugars and amino acids
13. Which of the following describes the fate of most of the water taken up by a plant?
(a) It is used as a hydrogen source in photosynthesis
(b) It is lost during transpiration
(c) It makes cell elongation possible
(d) It is used as a solvent
14. The greatest proportion of the water taken up by plants is
(a) stored in the xylem
(b) absorbed by central vacuoles during cell elongation
(c) lost through stomata during transpiration
(d) returned to the soil by roots
15. Organic molecules make up, what percentage of the dry weight of a plant?
(a) 17%
(b) 6%
(c) 67%
(d) 96%
16. More than of the water that enters the leaf eventually, leaves via transpiration.
(a) 10%
(b) 25%
(c) 50%
(d) 90%
17. How does water in the xylem travel to the mesophyll in the leaves?
(a) By osmosis due to the osmotic pressure in leaf tissue
(b) By active transport
(c) By a pumping mechanism unique to plants
(d) By a vacuum created within the leaf petioles
18. What properties of water enable it to travel up long distances in a plant?
(a) Cohesion
(b) Adhesion
(c) Both (a) and (b)
(d) Ice is less dense than liquid water
19. Column I some principles pertaining to physiology of plants. Column II the names of scientists, who proposed the idea. Match the two columns. Identify the correct choice from the codes given options.
Codes
A B C D A B C D
(a) 4 3 5 1 (b) 3 4 1 5
(c) 4 3 1 5 (d) 3 4 5 1
20. Biosynthetic phase of photosynthesis is also called
(a) Krebs’ cycle
(b) ETC
(c) Calvin cycle
(d) Glycolytic cycle
21. Calvin cycle fs also called
(a) glycolytic cycle
(b) ornithine cycle
(c) arginine cycle
(d) those phosphate cycle
22. Transport of organic solutes is supposed to take place by pressure flow hypothesis through phloem tissue from source to sink. Choose the false statement about vascular tissue transport.
(a) Phloem transport mainly water and sucrose but other sugars, hormone and amino acids are also transported
(b) Water enters into the sieve tube by the process of osmosis
(c) Water and solute move through the sieve tube along the pressure gradient
(d) Sieve tube in the source have a low turgor pressure (pressure potential)
23. The emitted electrons during photolysis of water are accepted by
(a) phycobilins
(b) carotene
(c) xanthophyll
(d) chlorophyll (oxidised P680 of PS-II)
24. The end product of photolysis of water is
(a) 02
(b) C02
(c) H202
(d) H2C03
25. Non-cyclic photophosphorylation during photosynthesis
(a) generates ATP
(b)produces NADPH
(c) Both (a) and (b)
(d)produces NAD
26. The end result of the cyclic electron pathway, from PS-1 to PS-11 is
(a) evolution of 02
(b) evolution of H+
(c) production of ATP
(d) production of e
27. Select the correct statement.
(a) The photosystem of chlorophyll absorbs solar energy
(b) Photosystem is the reaction center of chlorophyll
(c) Photosystem energises electrons
(d) Photosystem funnels electrons to electrons acceptor molecule
28. In cyclic phosphorylation
(a) electrons are expelled by the reaction center P700
(b) have a unidirectional passage via ETS
(c) ATP is not regenerated
(d) PS-1 has a inhibitory role
29. Photo-oxidation of water resulting in the release of molecular oxygen is due to
(a) PS-1
(b) PS-11
(c) Both (a) and (b)
(d) Phycobilins
30. The reaction center in a single chlorophyll-a is called
(a) PS-1
(b) PS-11
(c) Both (a) and (b)
(d) P
31. I. Carboxylation of RuBP is catalysed by RuBisCo.
II. The first stable inlermediSte compound formed is phosphoglycerate.
III. 18 ATP molecules are synthesised during dark cycle.
IV. NADPH + H+ is used to reduce diphosphoglycerate.
Select the correct option from the given options.
(a) II, III and IV
(b) I, III and IV
(c) I, II and IV
(d) I, II and III
32. Xerophytic plants fix C02 at night by a process called
(a) Krebs’ cycle
(b) Calvin cycle
(c) Crassulacean acid metabolism
(d) Hatch and Slack pathway
33. CO 2-fixation in sugarcane is by
(a) Krebs-Henseleit cycle
(b) Calvin cycle
(c) Hatch and Slack pathway
(d) Crassulacean acid metabolism
34. Maximum photosynthesis occurs in the presence of
(a) all spectral light
(b) red light
(c) green light
(d) blue light
35. What happens, when chlorophyll is exposed to. high intensity of light?
(a) Photosynthesis is accelerated
(b) Solarisation and destruction of chlorophyll occurs
(c) 02 evolution increases
(d) C02 fixation is inhibited
36. Photorespiration does not occur in which of the following.
(a) Wheat
(b) Rice
(c) Cereals
(d) Sugarcane
37. Match the following columns.
A B A B
(a) 1,2 3 (b) 1,3 2
(c) 3 1,2 (d) 2 1, 3
38. Calvin cycle does not include
(a) reduction of NADH
(b) carboxylation
(c) glycolytic renewal
(d) regeneration of RuBP
39. Carbon dioxide fixation occurs, when
(a) it combines with RuBP
(b) 3-phosphoglyceric acid is formed
(c) acetyl Co-A is produced
(d) pyruvic acid is formed
40. Photorespiration leads to the formation of
(a) 02
(b) C02
(c) H202
(d) q+,ef and02
41. Photorespiration occurs in tissues of plants that contain
(a) phycobilins
(b) chlorophyll
(c) xanthophyll
(d) carotene
42. If photosynthesising, green algae are provided with C02 labelled with an isotope of oxygen (O18), later analysis showed that all of the following compounds produceds by the algae contains 18 0 except
(a) PGA
(b) RuBP
(c) Glucose
(d) 02
43. Principal photosynthetic enzyme is
(a) peroxidase
(b) oxidase
(c) RuBP-carboxylase
(d) glycosidase
44. Match the following columns.
Codes
A B A B
(a) 1,2 3 (b) 3 1,2
(c) 1 2,3 (d) 2,3 1
45. Select the false statement. !
(a) ATP or NADH is not formed during photorespiration
(b) C4-pathway of photosynthetic C02 fixation was first discovered by Hatch and Slack
(c) Photorespiration results in maximum production of ATP
(d) In C4-plants,*Phospho-Enol Pyruvate (PEP) acts as C02 acceptor
46. Photosynthetic activity in green plants requires wavelength of light in the range of
(a) 600-900 mu
(b) 350-400 mu
(c) 500-600 mu
(d) 400-800 mu
47. A scientist disrupted the chloroplast and separated the stroma from lamella. For fixing C02 he supplied stroma with
I. ATP
II. NADPH
III. Glucose
Select the correct option.
(a) I and III (b) III and II
(c) I and II (d) I, II and III
48. TheC02 compensation point for C4-plants is
(a) 1.0-2.0 ppm
(b) 0.5-1.5 ppm
(c) 0.0-5.0 ppm
(d) 2.5-8.6 ppm
49. Carbohydrate translocations in plants occurs in the form of
(a) galactose
(B)glucose
(c) fructose
(d)sucrose
50. Translocation is a
(a) catabolic process
(b)anabolic process
(c) passive mechanism
(d)ATP dependent process
51. Differences in the hydrostatic pressure between leaf and storage organs promotes
(a) ascent of sap
(b) storage of water
(c) translocation
(d) photorespiration
52. I. Initial C02 acceptor.
II. Extent of photorespiration.
III. Enzyme catalysing reaction that fixes C02.
IV. The presence of Calvin cycle.
V. Leaf anatomy.
Which one does not differ in a C3 and C4-plants?
(a) I and V
(b) Only IV
(c) II and III
(d) Only II
53. Which of the following mineral element plays an important role in biological nitrogen fixation?
(a) Cu
(b) Mn .
(c) Zn
(d) Mo
54. Which of the following protein is found in the coralloid roots inhabited by Rhizobium?
(a) Leghaemoglobin
(b) Plastocyanin
(c) Nitrate reductase
(d) Hydrogenase
55. In which one of the following is nitrogen not a constituent?
(a) Idioblast
(b) Bacteriochlorophyll
(c) Invertase
(d) Pepsin
56. The major portion of the dry weight of plant comprises of
(a) nitrogen, phosphorus and potassium
(b) calcium, magnesium and sulphur
(c) carbon, nitrogen and hydrogen
(d) carbon, hydrogen and oxygen
57. Which of the following element is responsible for maintaining turgor?
(a) Sodium
(b) Potassium
(c) Calcium
(d) Magnesium
58. I. It is the characteristic of C4-plants. , .
II. It is the characteristic of Cg-plants.
III. It occurs in chloroplast.
IV. It occurs in daytime.
V. It occurs in night.
Select the correct options in relation to photorespiration.
Correct option Incorrect option
(a) I, IV II, III, V
(b) II, III, IV I, V
(c) I, II, III IV, V
(d) IV, V I, II, III
59. Which of the following is required in minimum amount?
(a) Ni
(b) S
(c) P
(d) Ca
60. Which is essential for root hair growth?
(a)Zn
(b)Ca
(c) Mo
(d)S
61. Passive absorption of mineral salt is not
(a) osmosis
(b) diffusion
(c) donnan equilibrium
(d) ion exchange
62. Which of the following is non-essential elements in plant nutrition?
(a) Na
(b) Mg
(c) Ca
(d) Fe
63. K, N, Ca, Mg deficiency cause
(a) chlorosis
(b) leaf curl
(c) red rust of tea
(d) red rot of sugarcane
64. For its action, nitrogenase requires
(a) high input of energy
(b) Mn2+
(c) light
(d) super 02 radicals
65. In a germinating seed, when protein is aerobically oxidised, the RQ value will be
(a) less than one
(b) more than one
(c) zero
(d) one
66. The enzyme of EMP are located in
(a) cytosol
(b) cytosol and mitochondria
(c) lysosomes
(d) ribosomes
67. The last end product of glycolysis is
(a) acetyl Co-A
(b) pyruvic acid
(c) phosphoglyceraldehyde
(d) fructose
68. Match the following columns.
69. Which enzyme is not present in electron transport system?
(a) NADH dehydrogenase .
(b) Cytochrome-c oxidase
(c) FeS protease
(d) G6 phosphate dehydrogenase
70. Photosynthesis and respiration are similar because
I. in eukaryotes, both processes occur in specialised
organelles.
II. ATP synthesis in k^bth is explained by chemiosmotic theory.
III. both use ETC.
Select the correct option.
(a) I and II
(b) II and III
(c) I and III
(d) I, II and III
71. Pyruvic acid enters TCA in the form of
(a) OAA
(b) malic acid
(c) acetyl Co-A
(d) citric acid
72. Identify the correct option for A and B
73. The most common auxin is
(a) GA
(b) ABA
(c) kinetin
(d) IAA
74. ABA acts antagonistic to
(a) ethylene
(b) cytokinin
(c) gibberellic acid
(d) IAA
75. Each meristem influences other meristems. The phenomenon is
(a) allometry
(b) growth correction
(c) lag phase
(d) auxetic growth
76. Types of plants that come to flower after exposure to short photoperiods followed by long photoperiods are
(a) intermediate plants
(b) SLDP
(c) day-neutral plants
(d) LSDP
77. A long-day plant flowers only, when it is exposed to
(a) red light
(b) light more than critical day length
(c) light equal to critical day length
(d) light less than critical day length
78. Genetically dwarf plants can be induced to grow tall by using
(a) gibberellins
(b) phycobilins
(c) auxins
(d) cytokinins
79. I. Kinetin is a degradative substance from DNA.
II. ABA is present in all plants including lower plants.
III. Low ratio of cytokinin to auxin favours root formation only.
IV. ABA is synthesised catabolically through glycolysis pathway.
Choose the correct combination of options.
(a) I and II
(b) II and III
(C) I and III
(d) III and IV
80.Which of the followingis is incorrectly matched ?
81. Phytochrome occurs in two forms. In which form it promotes the germintation of seeds of some species?
(a) Pfr forms
(b) Pr forms
(c) Both (a) and (b)
(d) None of these
82. Phytochrome was isolated by
(a) Butler et. al
(b) W Went
(c) R Hill
(d) Borthwick et. al
83. Ethylene is used for
(a) retarding ripening of tomatoes
(b) hastening of ripening of apples
(c) gastening of ripening of fruits
(d) Both (b) and (c)
84. Photoperiodism influences
(a) seed germination
(b) vegetative growth
(c) internode elongation
(d) All of the above
85. I. lndole-3-acetic acid
II. 2-4, dichlorophenoxy acetic acid
III. 6 Indole butyric acid
IV. Naphthalene acetic acid
Above are the examples of which PGR?
(a) Auxin
(b) Cytokinin
(c) Ethylene
(d) Gibberellin
86. Who first suggested the presence of growth regulatory chemicals in plants?
(a) Went
(b) Sachs
(c) Darwin
(d) Paal
87. Select the correct pathway for electron transport during photosynthesis.
(a) C02 ->RuBP-> Glucose -ATP
(b) H20->PS-I->PS-Il->NADPH + H+
(c) H20->PS-Il->PS-I->NADPH + H+
(d) Hp-> PS- II -> PS -1 -> ATP
88. During drought, plants develop hormone
(a) indole acetic acid
(b) naphthalene indole acetic acid
(c) indole butyric acid
(d) abscisic acid
89. In tissue culture, differentiation of root and shoot can be controlled by
(a) modifying auxin and cytokinin ratios
(b) using tissue culture of right size
(c) giving temperature shocks
(d) change in light intensity
90. Seed dormancy can be broken by
(a) ethylene and gibberellin
(b) auxin and gibberellin
(c) gibberellin and cytokinin
(d) auxin and ABA
Direction (Q. Nos. 91-97) In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
(a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
(c) If Assertion is true, but Reason is false.
(d) If both Assertion and Reason are false.
91. Assertion Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.
92. Assertion When dried seeds of pea are placed in a tin and water added up to their upper level and then a lid is putted lightly over it. Within an hour, the lid will be blown off.
Reason Due to rapid cell division in pea seeds.
93. Assertion A transverse section of a log of gymnospermous wood does not show pores.
Reason 90-95% of gymnosperm wood consists of .tracheids.
94. Assertion Sieve tubes and companion cells are called sister cells.
Reason Sieve tubes and companion cells arise from same mother cells.
95. Assertion The quiescent centre acts as a reservoir of relatively resistant cells, which constitute a permanent source of active initials.
Reason The cells of the inactive region of quiescent centre become active, when the previous active initials get damaged.
96. Assertion Protoplasmic respiration uses protein as respiratory substrate.
Reason Floating respiration uses carbohydrate and fat.
97. Assertion Deficiency of sulphur causes chlorosis in plants.
Reason Sulphur is the constituent of chlorophyll, proteins and nucleic acids.
98. Match the following columns.
Codes
A B C D
(a) 4 5 1 2
(b) 1 2 5 4
(c) 4 2 1 3
(d) 3 2 4 5
99. Match the following columns.
Codes Codes
A B C D A BCD
(a) 2 1 5 4
(b) 4 1 2 3
(c) 5 4 2 1
(d) 3 2 4 1
100.Match the following columns.
A BCD
(a) 1 2 3 4
(b) 2 3 4 5
(c) 3 4 5 1
(d) 4 5 1 3
Answers :
