1. Which branch of botany deals with
functional aspects of plants?
(a) Morphology (b) Physiology
(c) Ecology (d) Embryology
2. Who is called father of plant
physiology?
(a) Calvin (b) J.C. Bose
(c) Stephen Hales (d) Van Helmont
3. If the cell is placed inhypertonic
solution, what will happen?
(a) Endosmosis (b) Exosmosis
(c) Deplasmolysis (d) No change
4. Diffusion pressure of pure solvent it:
(a) Always more than its solution
(b) Sometimes more than its solution
(c) Less than its olution
(d) Equal to its solution
5. Suction pressure of cell as: (NEET)
(a) Equal to wall pressure
(b) Equal to turgor pressure
(c) Equal to DPD
(d) Osmotic pressure
6. DPD (NEET)
(a) OP X TP (b) OP + TP
(c) OP - WP (d) TP - WP
7. What will be zero in a fully turgid
cell?
(a) Pressure potential (b) Osmotic potential
(c) Water potential (d) OP
8. Plasma membrane controls:
(a) Passage of
(b) Passage of water and some solutes
preferably in ionic form into and out of the cell
(c) Passage of water and solutes into
the cell
(d) Passage of cell contents out of
the cell
9. In a flaccid cell, what will be zero? (NEET)
(a) SP (b) OP (c)
DP (d) WP
10. In a flaccid cell: (NEET)
(a) SP = TP (b) water optential = OP
(c) SP > OP (d) SP < OP
11. Whater potential can be calculated as
(a) (b)
(c) Osmotic Potential + Pressure
potential
(d)
12. Which of the following is aganist
concentration gradient of solutes?
(a) Transpiration (b) Translocation
(c) Diffusion (d) Osmosis
13. Seeds when placed in water swell because
of
(a) Osmosis (b) Root pressure
(c) Imbibition (d) Diffusion
14. Cell A with OP = 6 and WP = 5 is surrounded by the cells with OP = 3 and
TP = 2, What will be direction of water movement? (NEET)
(a) From A to other cells
(b) From other cells to A
(c) No net movement
(d) Waer will move up
15. OP of the cell can be measured by : (NEET)
(a) Monometric method
(b) Photometric method
(c) Plasmolytic method
(d) Colorimetric method
16. What determines the diffusion of water
from one cell to other cell?
(a) OP (b) WP
(c) water ptential (d) TP
17. Cell A has osmotic pot = -8 bars and
pressure pot = 5 bars and cell B has osmotic pot = -12 bars and wall pressure 2
bars, what is direction of flow
(a) (b)
(c) No movement (d)
18. Why plants die when over fertilized?
(a) As a result of dehydration or
exosmosis
(b) Due to damage of walls of root
hairs
(c) Due to blockage of nitrogenous
ions
(d) Due of upsets in soil environment
by poisonous soil bacteria.
19. The form and structure of cell is
maintained due to
(a) Atmospheric pressure
(b) Plasmolysis (c) Turgidity (d)
WP
20. The root hairs arise from:
(a) Pericycle (b) Epiblema
(c) Endodermis (d) Cortex
21. The root hairs zone in roots is :
(a) Permanent (b) Temporary
(c) Both (a) and (b) (d) None of these
22. Root hairs are more developed in (NEET)
(a) herbs (b) Shrubs
(c) Trees (d) Equality developed
23. Water will be absorbed by root hairs when
:
(a) Concentration of salts in soil is
high
(b) Concentration of solutes in the
cell sap is high
(c) Plant is rapidly transpiring
(d) They are separated from soil by
semipermeable membrane
24. Water from the soil enters into the root
hairs on account of:
(a) TP or WP
(b) water potential gradient
(c) Barometric pressure
(d) Osmotic pressure
25. The soil is physiloically dry when:
(a) It has no hygroscopic water
(b) conc. of soil solution is higher
than cell sap
(c) Soil temp is
(d) Excess of in soil
26. Which of the following does not involve
osmosis?
(a) Water passing from root hais to
adjacent cells
(b) Water passing up a xylem element
to another element above it
(c) Waterentering mesophyll cell from
xylem elements
(d) Water from soil into the root
hair
27. The absorbed water can rise to highest
point by :
(a) Root pressure (b) Imbibition force
(c) Force of capillary (d) Transpiration pull
28. Water potential in dry seed is determined
by
(a) Osmotic potential (b) Pressure potential
(c) Matric potenital (d) all the above
29. Girdling experiment was first performed by
:
(a) Kramer (b) J.C. Bose
(c) Strasburger (d) hartig
30. The pressure
developed in tracheary elements of xylem due to merabolic activity of roots is
called :
(a) OP (b) TP
(c) Root pressure (d) Atmospheric
pressure
31. Root pressure is measured by: (NEET)
(a) Potometer (b) Baromter
(c) Manometer (d) Auxanometer
32. Root pressure is maximum when :
(a) Transpiration is high and
absorption is low
(b) transpiration is very low and
absorption is high
(c) Both are very high
(d) Both are very low
33. Sir J.C Bose was supporter of .... theory
of ascent of sap.
(a) Root pressure theory
(b) Physical force theory
(c) Vital force theory
(d) None of these
34. Term ‘Root pressure’ was first given by:
(a) Priestly (b) Stephen Hales
(c) Syocking (d) Godlewski
35. Diffusion pressure declines by :
(a) Addition of solute to solvent
(b) Addition of solvent in solute
(c) Diluting a solution
(d) None of the above
36. Ascent of sap in absence of roots was
observed by
(a) J.C Bose (b) Priestly
(b) Strasburger (d) None of these
37. Inverse correclation is observed in
between (NEET)
(a) Pressure potential and water
potential
(b) TP and WP
(c) DPD and SP
(d) None of the above
38. The theory of Dixon and Jolly gets support
from (NEET)
(a) dendrographic measurements
(b) Porous pot experiment
(c) High tensile strength strength of
xylem sap
(d) All of these
39. Swelling of wooden doors during rainy
season is due to:
(a) Endosmosis (b) Deplasmolysis
(c) Capillarity (d) Imbibition
40. Many transplanted plants do not survive
due to (NEET)
(a) They do not like new soil
(b) They do not get required mineral
salt
(c) Most of the root hairs are lost
during transplantation
41. A solution of 1m sucrose is sujected to an
osmometer. It develops a pressure of 27 bars. Whihc of the following is
correct? (NEET)
(a) Osmotic potential of solution is
= 27 bars
(b) Osmotic pressure is = 27 bars
(c) Pressure potential is = 27 bars
(d) Wall pressure is = 27 bars
42. When a plant wilts, sequence of events
will be as:
(a) Exosmosis, deplasmolysis,
plasmolysis, temporary and permanent wilting
(b) Exosmosis, plasmolysis,
deplasmolysis temporary and permanent wilting
(c) Exosmosis, plasmolysis, temporary
and permanent wilting
(d) None of the above
43. Pulsation theory of ascent of sap was
proposed by
(a) Dixon and Jolly (b) J.C. Bose
(c) Curtis and Clarke (d) None of these
44. First theory for the ascent of sap was
proposed by
(a) Westermaier (b) J.C.bose
(c) Godlewski (d) Stephen Hales
45. A girdled tree (upto bast) ,ay survive for
some time but it will eventually die because.
(a) Water will not move upwards
(b) Water wull not move upwards
(c) Sugars and other organic
meterials will not move downwards
(d) Sugars and other organic marerials
will not move upwards
46. How does the removal of a ring of bark and
wood from the trunk of a tree kills ?
(a) Mineral salts cannot go up
(b) Immediate sroppage of
photosynthesis
(c) Food and water cannot be
translocated
(d) The exposed part dies due to heat
47. Vital force theory for the ascent of sap
was proposed by : (NEET)
(a) Stephen Hales (b) Boehm
(c) Sachs (d) Goldewski
48. Which of the following contributes most to
transport of water from the ground to the levels of a tall tree?
(a) Break down of ATP
(b) Root pressure
(c) Capillary rise of water in xylem
(d) Cohesion of water and
transpiration pull
49. Xylem vessels are found in :
(a) Gymnosperms only
(b) Pteridophytes only
(c) Angiosperms
(d) Dicot plants only
50. The cohesive force of water is due to:
(a) S-bonds (b) O-bonds
(c) H-bonds (d) OH-bonds
51. When stem of plant is girdled (ringed) :
(a) The root dies first
(b) The shoot dies first
(c) The roots and the shoot will die
at the same time
(d) Neither the root nor the shoot
wilts
52. Diffusion pressure is directly
proportional to:
(a) Concentration of molecules
diffusing
(b) Kinetic energy of diffusing
molecules
(c) Concentration gradient
(d) All of the above
53. What should happen if a thin slice of sugar
beet is placed in a concentrated solution of NaCl?
(a) It should becomes turgid
(b) It should neither absorb water
nor loose it
(c) It should absorb water from the
NaCl solution
(d) It should loos water from the
cells
54. Epidermal peeling of Tradescantia leaf is
used for demonstrating:
(a) Plasmolysis and deplasmolysis
(b) Active absorption
(c) Passive absorption
(d) Mineral absorption
55. If cell A with OP = 5 and TP = 4 is
surrounded by the cells with OP = 3 and TP = 1, what will be direction of water
movement? (NEET)
(a) Water will not move up
(b) Water will move up
(c) From cell A to other cell
(d) From other cells to cell A
56. Ringing (girdling) experiment cannot be
performed in
(a) Sugarcane (b) Mango
(c) Indian rubber plant (d) Tectona
57. amount of water left in soil after through
drainage of gravitational water is known as: (NEET)
(a) Field capacity (b) Storage capacity
(c) Soil water (d) Gravitational capacity
58. Which of following is correct regarding
the translocation of substances in vascular tissues of plants?
(a) Organic substances, e.g, sugars
are transported upward in the xylem
(b) Organic substances move up and
down the phloem
(c) Salts and other inorganic
substances move downward only through the xylem
(d) Inorganic substances move upward
only through the phloem
59. Opening and closing of stomata is due to
the
(a) hormonal change in guard cells
(b) change in turgor pressure of
guard cells
(c) gaseous exchange
(d) respiration
60. Guard cells help in
(a) transpiration (b) guttation
(c) fighting against infection
(c) protection against grazing
61. Which of the following helps in ascent of
sap?
(a) root pressure (b) transpiration
(c) capillarity (d) all of these
62. The process of water exudation through
hydathodes is called
(a) excretion (b) transpiration
(c) guttation (d) hydrolysis
63. Active
exchange mechanism for opening and closing of stomata was given by
(a) Khorana (b) Levitt
(c) Deblin (d) Seath
64. Which of the following theory gives the
latest explanation for the closure of stomata?
(a) ABA theory (b) Munch theory
(c) Starch glucose theory
(d) Active tansport theory
65. Which of the following chemical serves as
an antitranspirant in plants? (NEET)
(a) cobalt chloride
(b) dimethyl mercury
(c) potassium iodide
(d) phenyl mercyric acetate
66. Guttation is the release of liquid water
from veins at the leaf margins. it is caused by
(a) transpiration
(b) high leaf pressure
(c) high root pressure
(d) clogged tracheids or vessel
elements
67. Transpiration is measured by (NEET)
(a) potometer (b) dendometer
(c) porometer (d) Moll’s apparatus
68. Wilting of plant occurs when
(a) xylem is blocked
(b) phloem is blocked
(c) epidermis and few root are
removed
(d) pith is removed
69. The soil water available for absorption by
plant roots is
(a) rain water (b) capillary water
(c) chemically bound water
(d) gravitational water
70. Translocation of minerals takes place
through
(a) phloem (b) xylem
(c) cambium (d) wood parenchyma
71. The continuity of water column in xylem is
maintained due to
(a) evaporation power of water
(b) cohesive property of water
(c) presence of air bubbles
(d) none of the above
72. ‘Transpiration is a necessary evil”, this
statement belongs to
(a) Burgerstein (b) Reschke
(c) Curtis (d) Willmer
73. Who among the following scientists first
gave the starch sugar interconversion theory for stomatal movements? (NEET)
(a) Loftfield (b) Lloyd
(c) Sayre (d) Von Mohl
74. Some carrier proteins allow transport only
if two types of molecules move together. This is called co-transport. It may be
(a) Symport (b) antiport
(c) (a) and (b) (d) equiport
75. Stomata open when the guard cells have
(a) more (b) less
(c) more abscissic acid (d) all of these
76. Which of the following is not afactor
controlling osmosis
(a) presence of semipermeable
membrane
(b) concentration gradient
(c) colour of substance
(d) difference in pressure
77. Water potential is not measured in
(a) atmosphere (b) bars
(c)pascals (d) molar unit
78. Which is the first to occur in seed
germination
(a) diffusion (b) imbibition
(c) osmosis (d) none
79. Column - I Column
- II (NEET)
(a) Priestley i) Capillary force theory
(b) Boehm ii) Osmotic theory
(c) Godlewski iii) Root pressure theory
(d) Atkins iv) Realy pump theory
(e) Sachs v) Imbibition theory
a b c d e
(a) iii i iv ii v
(b) iv i v ii iii
(c) v iii iv i ii
(d) ii v iii iv i
80. Which arbitrary values of DPD, OP and TP
appear correct for a turgid cell? (NEET)
(a) DPD 02 atm ; OP 07 atm ; TP 5 atm
(b) DPD 00 atm; OP 15 atm ; TP 15 atm
(c) DPD 10 atm; OP 15 atm ; TP 6 atm
(d) DPD 05 atm; OP 12 atm ; TP 7 atm
81. Bacteria cannot survive in a highly salted
pickle because:
(a) Salt inhibits reproduction of
bacteria
(b) Enough light is unavaiable for
photosynthesis
(c) They become plasmolysed and
killed
(d) Nutrients in the pickle medium
cannot support life
82. Osmoscope is used for :
(a) Measuring OP (b) Measruing TP
(c) Measuring
(d) Demonstration of osmosis
83. Osmosis means :
(a) movement of molecules from higher
concentration to lower concentration
(b) Uptke of water by roots
(c) Passage of solvent from a weaker
solution to stronger solution across a semipermeable membrane
(d) passage of solvent from a weaker
to a stronger solution
84. The main difference between active and
passive transport across cell membrane is that:
(a) Active transport is more rapid
than passive
(b) passive transport is
non-selective
(c) Passive transport is due to the
concentration gradient across the cell membrane whereas active transport is due
to metabolic energy
(d) Passive transport is confined to
anions, whereas active transport is confined to cations only
85. Id cells kept for sometime in 1 M solution
of sucrose and 1 M solution of NaCl. The water potenital of the cells kept in : (NEET)
(a) Sucrose solution will be greater
(b) NaCl solution will be grater
(c) Both will be equal
(d) Sucrose solution would be lower
and NaCl solution would be greater
86. Water is absorbed when outside solution is
(a) Hypertonic (b) Hypotonic
(c) Isotonic (d) None of these
87. Actively growing plant tissues have a
water content of
(a) 20 - 40% (b) 40 - 50%
(c) 65 - 75% (d) 85 - 90%
88. 0.5 M
sucrose solution develops a pressure of 15 bars in an osmometer, which
of the following statement is wrong for such asolution?
(a) That its osmotic potenital is -
15 bars
(b) That its water potential is - 15
bars
(c) That is pressure potential is -15
bars
(d) That its osmotic pressure +15
bars
89. Osmosis involves
(a) Cell to cell movement of water
(b) Movement of water through
cortical cells
(c) Passive absorption of water
through roots
(d) All of the above
90. Water absorption through roots can be
increased by
(a) Increased transpiration
(b) Increased rate of phtosunthesis
(c) Decreased transpitation
(d) Decreased absorption of ions
91. What happens when a formalin preserved
filament of Spirogyra is placed a hypertonic sugar solution?
(a) It losse turgidity (b) it gains turgidity
(c) It is plasmolysed (d) Nothing happens
92. Imbibition process involves
(a) both diffusion and capillary
action
(b) Only diffusion
(c) Only capillary action
(d) None of the above
93. A cell placed in hypertonic solution
plasmolyses, the space between the cell wall and plasmolysed contents is filled
with;
(a) Water (b) Cell sap
(c) Hypertonic solution or outer
solution
(d) Hypertonic solution and cell sap
94. Root pressure is due to :
(a) Passive absorption
(b) Active absorption
(c) Increase in transpiration
(d) Increase in photosynthesis
95. Root hairs cells under ordinary conditions
typically have water potential inthe range of
(a) 1 to 4 atmospheres
(b) -1 to -4 atmospheres
(c) 1 to 2 atmospheres
(d) -1 to 2 atmospheres
96. The direction and rate of water movement
form cell to cell is based on (NEET)
(a) Wp (b) TP
(c) DPD gradient(d) Incipient
plasmolysis
97. A higher plant cell, impregnated with
cutin and suberin is placed in water, what would happen after 15 minutes? (NEET)
a)cell size will increase
b) cell size will decrease
c)no change in the cell
d) cell would be killed
98. Osmotic pressure of cell sap is highest
in (NEET)
(a) Halophytes (b) Mesophytes
(c) Hydrophytes (d) Lithophytes
99. Conduction of sap in plants occurs through
:
(a) heart wood only (b) Sap wood only
(c) Xylem as whole (d) All these
100. Water potential of a ell is lowered by
(a) Addition of solutes
(b) Increasing temperature
(c) Addition of water
(d) Decreasing the tmperature
KEY
01-10 b c b a c c c b d b
11-20 c d c c c c a a c b
21-30 b a b b b b d d d c
31-40 c b c b a c c d d c
41-50 a a b c c c d d c c
51-60 a d d a c a a b b a
61-70 d c b d d c a a b b
71-80 b c b c a c d b a b
81-90 c d c c a b d c d a
91-100 d a c b b c c a b a
