THIS TEST INCLUDING FOLLOWING CHAPTERS
Transport in Plants
Mineral Nutrition
Photosynthesis in Higher Plants
Respiration in Plants
Plant Growth and Development
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NEET CRASH COURSE PAPER 2022 -- UNIT TEST - 2
1 . Drooping of leaves due to loss of turgor at noon but recovery in the evening is referred as
( a ) temporary wilting
( b ) incipient wilting
( c ) permanent wilting
( d ) midday desiccation .
2. When plant cells are kept in hypertonic salt solution , they get ..
( a ) turgid
( b ) deplasmolysed
( c ) plasmolysed
( d ) lysed .
3 . A leaf peeling of Tradescantia is kept in a medium having 10 % NaCl . After a few minutes if we observe the leaf peel under the microscope , we are likely to see
( a ) entry of water into the cell
( b ) the cells bursting out
( c ) diffusion of NaCl into the cell
( d ) exit of water from the cell .
4 . Accumulation of which one of the following acids results into closure of stomata ?
( a ) Malic acid
( b ) Aspartic acid
( c ) Phosphoenol pyruvic acid
( d ) Oxaloacetic acid .
5. Osmotic pressure of a pure solvent at 25 ° C and 1 atm is always
( a ) less than its solution
( b ) more than its solution
( c ) constant
( d ) zero
6 . An osmometer is filled with 0.5 M solution of NaCl in water . In which of the following solutions it must be immersed in order to make it shrink ?
( a ) 0.5 M solution
( b ) 0.05 M solution
( c ) Distilled water
( d ) 0.75 M solution
7. The relationship tv = nRT is not obeyed by
( a ) concentrated solution
( b ) dilute solution
( c ) extremely dilute solution
( d ) all of these .
8 . What will be the direction of movement of water , when a solution A having water potential of - 9 bars and another solution of B of - 4 bars is separated by a semipermiable membrane ?
( a ) B to A
( b ) In both directions
( c ) A to B
( d ) None of these
9 . Which of the following statements is not true for stomatal apparatus ?
( a ) Guard cells invariably possess chloroplasts and mitochondria .
( b ) Guard cells are always surrounded by subsidiary cells .
( c ) Stomata are involved in gaseous exchange .
( d ) Inner wall of guard cells are thick .
10. What is correct about the movement of substance across the membrane facilitated diffusion ?
( a ) It is an active transport
( b ) It doesn't cause transport of molecules from low concentration to high concentration
( c ) It is insensitive to inhibitors
( d ) It is a very specific transport
11. Which of the following is not a purpose of transpiration ?
( a ) Helps in absorption and transport in plants .
( b ) Prevents loss of water .
( c ) Maintains shape and structure of plants by keeping the cell turgid .
( d ) Supplies water for photosynthesis .
12. Stomatal opening or closing is due to
( a ) change in the turgidity of guard cells
( b ) the inner walls of each guard cells is thick and elastic
( c ) cellulose microfibrils of guard cells are oriented radially
( d ) all of these .
13. Force generated by transpiration can create pressure sufficient to lift water even upto the height of
( a ) 130 feet
( b ) 130 metre
( c ) 230 feet
( d ) 230 metre .
14. Choose the wrong statement .
( a ) Cells swell in hypertonic solutions and shrink in hypotonic solutions .
( b ) Water potential is the kinetic energy of water which helps in the movement of water .
( c ) The absorption of water by seeds and dry wood takes place by a special type of diffusion called imbibition .
( d ) Solute potential or ys is always negative .
15. Oozing out of water drops from injured edges or tips is called
( a ) oozation
( b ) bleeding
( c ) guttation
( d ) transpiration .
16. The rate of transpiration can be measured with the help of
( a ) auxanometer
( b ) refractometer
( c ) spectrophotometer
( d ) potometer .
17. According to Lloyd , the opening and closing to stomata is governed by
( a ) K+ ion influx and efflux
( b ) change in pH
( c ) starch sugar interconversion
( d ) photosynthetic activity of guard cell chloroplasts .
18. Which is not associated with ascent of sap in tall trees ?
( a ) Continuity of water column
( b ) Cohesion and adhesion of water molecules
( c ) Transpiration pull
( d ) Pressure of tracheary elements
19. Technique of growing plants without soil in nutrient solution is called
( a ) hydroponics
( b ) aquaculture
( c ) parthenogenesis
( d ) tissue culture .
20. A metal ion involved in stomatal regulation is
( a ) iron
( b ) potassium
( c ) zinc
( d ) magnesium
21. Carefully read the following reactions carried out by nitrogen fixing bacteria . Identify the statement about these equations which is not true . 2NH3 + 3O₂ → 2NO₂ + 2H+ + 2H₂O ... ( A )
2NO₂ + O₂ → 2NO3 ... ( B )
( a ) Both the steps ( A ) and ( B ) can be called nitrification .
( b ) Step ( A ) is carried out by Nitrosomonas or Nitrococcus .
( c ) Both the steps occur only in photoautotrophs .
( d ) Step ( B ) is carried out by Nitrobacter .
22. Which one of the following elements in plants is not remobilised ?
( a ) Phosphorus
( b ) Calcium
( c ) Potassium
( d ) Sulphur
23. The limiting factor in nitrogen fixation of soil is
( a ) soil nature ( pH )
( b ) light
( c ) temperature
( d ) air .
24. Nitrogen is absorbed by plants in form of
( a ) NO3
( b ) NH3
( c ) NO₂
( d ) both ( a ) and ( c ) .
25. Plants could be grown to maturity in a defined nutrient solution was demonstrated for the first time by
( a ) Priestley
( b ) Von Sachs
( c ) Ingenhousz
( d ) Van Niel .
26. The deficiency of which of these essential elements results in interveinal
chlorosis in older leaves ?
( a ) Mg
( b ) Ca
( c ) N
( d ) S
27. The common nitrogen - fixer in paddy fields is
( a ) Rhizobium
( b ) Azospirillum
( c ) Oscillatoria
( d ) Frankia .
28. Necrosis , or death of tissue particularly leaf tissue , is due to the deficiency of ( a ) N , K , S
( b ) N , K , Mg and Fe
( c ) Mn , Zn and Mo
( d ) Ca , Mg , Cu and K.
29. Zn , Mo , Fe , Cu are
( a ) trace elements
( b ) non - essential elements
( c ) macro nutrients
( d ) none of these .
30. The macronutrient which is an essential component of all organic compounds , yet not obtained by plants from soil , is
( a ) nitrogen
( b ) carbon
( c ) phosphorous
( d ) magnesium .
31. Boron in green plants assists in
( a ) activation of enzymes
( b ) acting as enzyme co - factor
( c ) photosynthesis
( d ) sugar transport .
32. The plant ash is an indication of
( a ) organic matter of plant
( b ) waste product
( c ) mineral salts absorbed by plants
( d ) none of the above .
33. Critical elements are
( a ) Na , K and Ca
( b ) N , P and Mg
( c ) N , P and K
( d ) Mn , B and Mo.
34. Scorched tip in leaves appear deficient in
( a ) Ca² +
( b ) Mg² +
( c ) K +
( d ) sulphur .
35. In plant mineral nutrition , elements are classified as macro or micro - elements depending upon their
( a ) relative presence in plant ash
( b ) relative importance in plant growth
( c ) relative amount required in plants
( d ) relative availability in soil
36. Plants require sulphur for
( a ) ATP synthesis
( b ) protein synthesis
( c ) glucose synthesis
( d ) DNA replication
37. For every CO₂ molecule entering the Calvin cycle , the number of ATP and NADPH required is
( a ) 2 ATP + 2 NADPH
( b ) 2 ATP + 3 NADPH
( c ) 3 ATP + 2 NADPH
( d ) 3 ATP + 3 NADPH .
38. Which of the following is wrongly matched ?
( a ) Sorghum - Kranz anatomy
( b ) PEP carboxylase - mesophyll cells
( c ) Blackman - law of limiting factors
( d ) PS II - P700
39. In Kranz anatomy , the bundle sheath cells have
( a ) thin walls , many intercellular spaces and no chloroplasts .
( b ) thick walls , no intercellular spaces and large number chloroplasts .
( c ) thin walls , no intercellular spaces and several chloroplasts .
( d ) thick walls , many intercellular spaces and few chloroplasts .
40. In a chloroplast , what is the ratio of chl a : chl b and carotenes : xanthophylls respectively ?
( a ) 3 : 1 and 2 : 1
( b ) 2 : 1 and 3 : 1
( c ) 3 : 2 and 1 : 1
( d ) 1 : 1 and 3 : 2
41. Photorespiration takes place in
( a ) chloroplast , mitochondria
( b ) mitochondria , peroxisome
( c ) chloroplasts , peroxisome , mitochondria
( d ) chloroplasts , cytoplasm , mitochondria .
42. The chemical structure of chlorophyll a varies from chlorophyll b due to difference between
( a ) CH3 and C2H5
( b ) CH3 and HCH = CH₂
( c ) CH3 and CHO
( d ) CHO and CH = CH₂ .
43. Solarisation is
( a ) formation of chlorophyll
( b ) destruction of chlorophyll
( c ) utilisation of sunlight
( d ) effects of solar light .
44. In an experiment demonstrating the evolution of oxygen in Hydrilla . Sodium bicarbonate is added to water in the experimental set - up . What would happen if all other conditions are favourable ?
( a ) Amount of oxygen evolved decreases as the availability of carbon dioxide increases .
( b ) Amount of oxygen evolved increases as carbon dioxide in water is absorbed by sodium bicarbonate
( c ) Amount of oxygen evolved decreases as carbon dioxide in water is absorbed by sodium bicarbonate
( d ) Amount of oxygen evolved increases as the availability of carbon dioxide increases .
45. The creation of proton gradient across the thylakoid membrane is a result of
( a ) decrease in proton number in stroma
( b ) accumulation of protons in the lumen
( c ) decrease in the pH in the lumen
( d ) all of these .
46. In photophosphorylation , under the circumstances when NADP is no longer available as acceptor the electrons are passed to
( a ) plastoquinone
( b ) plastocyanin
( c ) cytochrome b6 - f complex
( d ) quinone .
47. Which of the following is formed during photorespiration ?
( a ) Sugar
( b ) Phosphoglycolate
( c ) NADPH
( d ) ATP
48. In CAM plants stomata are
( a ) closed to night and open during the day
( b ) closed during the day and open at night
( c ) never closed
( d ) never opens .
49. A decrease in photosynthetic rate with increased availability of oxygen is called
( a ) Richmond Lang effect
( b ) Warburg effect
( c ) Blackman's law of limiting factors
( d ) Emerson enhancement effect .
50. Assimilatory powers produced during photosynthesis are
( a ) RuDP and RUMP
( b ) ATP and NADPH₂
( c ) C6H12O6 and PGAL
( d ) H₂O and O₂ .
51. Moll's half leaf experiment photosynthesis proves that during
( a ) carbon dioxide is necessary
( b ) oxygen is released
( c ) organic substance is produced
( d ) chlorophyll is necessary .
52. Chlorophyll solution appears green in transmitted light but in reflected light it appears red because
( a ) of phenomenon of fluorescence
( b ) it reflect red light
( c ) both ( a ) and ( b )
( d ) none of these .
53. First transitory chemical formed by reaction between CO₂ and RuBP is
( a ) PGAL / GAP
( b ) 2 carboxy , 3 - keto , 1-5 biphosphoribotol
( c ) PGA
( d ) dihydroxy acetone phosphate .
54. Dichlorophenyl dimethyl urea ( DCMU )
( a ) inhibits O₂ evolution and non - cyclic photophos phorylation
( b ) promotes O₂ evolution and non - cyclic photophos - phorylation
( c ) both ( a ) and ( b )
( d ) none of these .
55. How many cytochromes are involved in the electron transport chain ?
( a ) Five
( b ) Two
( c ) Six
( d ) Four
56. Which of the metabolites is common to respiration mediated breakdown of fats , carbohydrates and proteins ?
( a ) Pyruvic acid
( b ) Acetyl COA
( c ) Glucose - 6 - phosphate
( d ) Fructose 1 , 6 - bisphosphate
57. How many ATP molecules will be generated in a plant system during complete oxidation of 40 moles of glucose ?
( a ) 190
( b ) 380
( c ) 1520
( d ) 3040
58. In which of the following cycles , O₂ is directly used
( a ) Glycolysis
( b ) Fermentation .
( c ) Electron transport chain
( d ) Oxidative decarboxylation
59. In the production of ethanol , pyruvic acid is first converted to acetaldehyde by the enzyme
( a ) alcohol dehydrogenase
( b ) alcohol oxidase
( c ) pyruvate dehydrogenase
( d ) pyruvate decarboxylase
60. During alcoholic fermentation by yeast two molecules of glucose produce
( a ) 2 molecules of ethanol + 2 molecules of CO₂
( b ) 4 molecules of ethanol + 4 molecules of CO₂
( c ) 6 molecules of ethanol + 6 molecules of CO₂
( d ) 3 molecules of ethanol + 3 molecules of CO₂ .
61. Choose the correct combination of labelling the molecules involved in the pathway of anaerobic respiration in Yeast .
( a ) A - Acetaldehyde , B - CO₂ , C- Ethanol
( b ) A- Ethanol , B - CO₂ , C - Acetaldehyde
( c ) A - Ethanol , B - Acetaldehyde , C- CO₂
( d ) A - CO₂ , B - Ethanol , C - Acetaldehyde
62. In a germinating seed when protein is aerobically oxidized , the R.Q value will be
( a ) more than one
( b ) less than one
( c ) one
( d ) zero .
63. No decarboxylation is involved in
( a ) electron transport system
( b ) glycolysis
( c ) Krebs ' cycle
( d ) alcoholic fermentation .
64. In electron transport chain , in the first step the hydrogen passes from
( a ) FMN to NAD
( b ) FMN to CoQ
( c ) NAD to FMN
( d ) NAD to CoQ .
65. Aerobic respiration is more anaerobic respiration because advantageous than ( a ) it occurs in the absence of oxygen
( b ) it produces more energy
( c ) it does not break down the respiratory substrate
( d ) it produces ethyl alcohol .
66. Floating respiration is respiration
( a ) occurring in cytosol
( b ) using carbohydrate as substrate
( c ) employing fat as respiratory substrate
( d ) both ( b ) and ( c ) .
67. R.Q indicates
( a ) effect of temperature
( b ) nature of respiratory substrate
( c ) amount of water released
( d ) type of alcohol formed .
68. In succulent plants like Opuntia , the RQ value will be
( a ) less than 1
( b ) more than 1
( c ) infinity
( d ) zero .
69. The equation of respiration
( a ) C6H12O6 + 6O₂ → 6CO2 + 6H₂O +686 Kcal
( b ) C6H12O6 + 2CO₂ → 6CO₂ + 6H₂O +686 Kcal
( c ) C6H12O6 + 6CO₂ → 6CO₂ + 6H₂O +680 Kcal
( d ) C6H12O6 + 6CO₂ → 12CO₂ + 6H₂O +686 Kcal .
70. Select a suitable name for the following process . C6H12O6 + 2ADP + 2Pi → 2C₂H5OH + 2ATP + 2CO₂ |
( a ) Alcoholic fermentation
( b ) Photorespiration
( c ) Lactate fermentation
( d ) Aerobic respiration
71. Following is involved in the catalysis of link reaction during aerobic respiration is
( a ) vitamin A
( b ) vitamin B₁
( c ) vitamin B6
( d ) vitamin K.
72. In respiration from 180g of glucose which of the following is formed ?
( a ) 264gm CO₂ + 190gm H₂O +391 Kcal
( b ) 264gm CO₂ + 108gm H₂O +686 Kcal
( c ) 390gm CO₂ + 108gm H₂O +686 Kcal
( d ) 390gm CO₂ + 264gm H₂O +391 Kcal
73. To avoid excessive water loss during severe drought stress , the closure of stomata is signalled by the production of
( a ) IAA
( b ) NAA
( c ) ABA
( d ) IBA
74. First natural cytokinin , zeatin was discovered
( a ) Letham
( b ) Skoog and Miller
( c ) Bensen
( d ) Thimann and Went .
75. Ripening of banana is accompanied with
( a ) sudden rise in cytokinin
( b ) sudden rise in auxin
( c ) sudden rise in ethylene
( d ) sudden rise in gibberellin .
76. The bioassay for ethylene is
( a ) triple pea test
( b ) pea stem swelling test
( c ) both ( a ) and ( b )
( d ) chlorophyll retention test .
77. Hormone involved in phototropism is
( a ) kinetin
( b ) IAA
( c ) gibberellin
( d ) 2,4 - D .
78. One set of the plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower . Under which one of the following categories will you place this plant ?
( a ) Long day
( b ) Darkness neutral
( c ) Day neutral
( d ) Short day
79. What will be the effect on phytochrome in a plant subjected to continuous red light ?
( a ) phytochrome synthesis will increase
( b ) level of phytochrome will decrease
( c ) phytochrome will be destroyed
( d ) first ( b ) then ( a ) .
80. Beta vulgaris is a
( a ) short day plant
( b ) long day plant
( c ) day neutral plant
( d ) intermediate plant
81. Which one of the following is a short day plant
( a ) Wheat
( b ) Barley
( c ) Lettuce
( d ) Dahlia
82. Nicotiana sylvestris flowers only during long days and N.tabacum flowers only during short days . If raised in the laboratory under different photoperiods , they can be induced to flower at the same time and can be cross - fertilised to produce self - fertile offspring . What is the best reason for considering N.sylvestris and N.tabacum to be separate species ?
( a ) They cannot interbreed in nature
( b ) They are reproductively distinct
( c ) They are physiologically distinct
( d ) They are morphologically distinct
83. The phytohormone which induces triple response is
( a ) IAA
( b ) ABA
( c ) GA3
( d ) C₂H4 .
84. Length of grapes stalks increases due to
( a ) auxin
( b ) cytokinins
( c ) gibberellins
( d ) ethylene .
85. Phototropic curvature in Avena coleoptile is the result of uneven distribution of
( a ) phytochrome
( b ) auxin
( c ) gibberellins
( d ) starch
86. Which of the following type of phytohormones resemble the nucleic acids in some structural aspects
( a ) cytokinins
( b ) auxin
( c ) gibberellins
( d ) abscisic acid .
87. If the growing plant is decapitated , then
( a ) its growth stops
( b ) leaves become yellow and fall down
( c ) axillary buds are inactivated
( d ) axillary buds are activated
88. Hormone responsible for senescence
( a ) ABA
( b ) auxin
( c ) GA
( d ) cytokinin .
89. The geotropic response of roots is mediated by
( a ) cytokinins
( b ) auxins
( c ) phytochrome
( d ) light stimulus
90. Violaxanthin is the precursor for the biosynthesis of
( a ) abscisic acid
( b ) cytokinin
( c ) ethylene
( d ) none of these .
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Ans key
1. A, 2.C, 3.D, 4.A, 5.D, 6.D, 7.C, 8.A, 9.B, 10.D, 11.B, 12.D, 13.B, 14.A, 15.B, 16.D, 17.C, 18.D, 19.A, 20.B, 21.C, 22.B, 23.A, 24.D, 25.B, 26.A, 27.B, 28.D, 29.A, 30.B, 31.D, 32.C, 33.C, 34.C, 35.C, 36.B, 37. C, 38.D, 39.B, 40.A, 41.C, 42.C 43.B, 44.D, 45.D, 46.C, 47.B, 48.B, 49.A, 50.B, 51.A, 52.A, 53.B, 54.A, 55.A, 56.B, 57.C, 58.C, 59.D, 60.B, 61.C, 62.B, 63.B, 64.C, 65.B, 66.D, 67.B, 68.D, 69.A, 70.A, 71.B, 72.B, 73.C, 74.A, 75.C, 76.C, 77.B, 78.D, 79.D, 80.B, 81.D, 82.A, 83.D, 84.C, 85.B, 86.A, 87.D, 88.A, 89.B, 90.A
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