Q.1
Which is incorrect option for cytokinin ?
  • a) Increases dominance of apical bud
  • b) Retards senescence
  • c) Stimulates cell division
  • d) Secreted in the region of active cell division
Q.2
Which group is correct for the growth inducer hormone ?
  • a) ABA, Ethylene
  • b) IAA, ABA and cytokinins
  • c) IAA, Gibberrelin, cytokinins
  • d) IAA, Gibberrelin, ABA
Q.3
Which type of dormancy is induced in seeds due to adverse condition and high temperature ?
  • a) Combinational dormancy
  • b) Secondary dormancy
  • c) Exogenous dormancy
  • d) Endogenous dormancy
Q.4
Match the list :
Column I Column II
(P) Volvox (i) Chemotaxis
(Q) Mimosa (ii) Phototaxis
(R) Antherozoids of bryophytes (iii) Movement / tropism
(S) Leaf tendril (iv) Thigmotropism
  • a) (P-i), (Q-ii), (R-iii), (S-iv)
  • b) (P-ii), (Q-iii), (R-iv), (S-i)
  • c) (P-ii), (Q-iv), (R-i), (S-iii)
  • d) (P-iv), (Q-iii), (R-ii), (S-i)
Q.5
Which type of meristematic tissue is found in monocot plant for growth ?
  • a) Intercalary meristematic tissue
  • b) Lateral meristem tissue
  • c) Meristematic tissue
  • d) Apical meristem tissue
Q.6
Which is required to inhibit germination of food storing part of potato ?
  • a) IAA
  • b) IBA
  • c) ABA
  • d) GA
Q.7
Which hormone inhibits formation of new cells ?
  • a) Kinetin
  • b) Abscisic acid
  • c) Gibberrelic acid
  • d) Indol-butaric acid
Q.8
In which phase of growth size of vacuole increases ?
  • a) cell difterentiation
  • b) Cell elongation
  • c) Cell transfer
  • d) Cell formation
Q.9
A : Adventitious roots develop by auxin in plants. R : Auxin, removes the dominant effect of apical bud.
  • a) A and R both correct, R is explanation of A.
  • b) A and R both correct but R is not explanation A.
  • c) A = correct, R = false
  • d) A = false, R = correct
Q.10
Which hormore is essential for initial growth of root ?
  • a) IBA
  • b) Kinetin
  • c) GA
  • d) ABA
Q.11
Which of the following stimulates growth in the internode region ?
  • a) Gibberrelin
  • b) Cytokinin
  • c) Abscisic acid
  • d) Auxin
Q.12
Which of the following sustance is not related with initiation of growth ?
  • a) Cytokinin
  • b) Gibberrelin
  • c) ABA
  • d) IAA
Q.13
Which type of dormancy is found when seed is impermeable to water or gaseous exchange ?
  • a) Mechanical dormancy
  • b) External dormancy
  • c) Physical dormancy
  • d) Chemical dormancy
Q.14
Which of the following is increased in plants as a result of growth ?
  • a) Width
  • b) Dry volume
  • c) Dry weight
  • d) Number
Q.15
What is A and B in the given figure ?
unit-4_ch-7_que_no-103_img_no1.png
  • a) Death and senescence
  • b) Death and Growth
  • c) Growth and death
  • d) Senescence and death
Q.16
Which is the specific use of synthetic auxin in higher concentration ?
  • a) Inhibits growth of lateral buds
  • b) Weedicide
  • c) Inhibits initial process of root formation
  • d) Regulates cell elongation
Q.17
Which organic chemicals are included in shoot with photoperiodism ? (AIIMS-1996)
  • a) Auxin
  • b) Ethylene
  • c) Cytokinin
  • d) Gibberrelin
Q.18
Garland of green leaves remain green, by treatment of which organic chemical ?
  • a) Auxin
  • b) Gibberrelin
  • c) Cytokinin
  • d) Ethylene
Q.19
During physiological and physical condition some changes observed in seed, is knows as ......
  • a) Combinational dormancy
  • b) Secondary dormancy
  • c) Exogenous dormancy
  • d) Endogenous dormancy
Q.20
Which of the following is an example of thermonasty ?
  • a) Mimosa
  • b) Sunflower
  • c) Crocus
  • d) Lotus
Q.21
Which of the following organic chemical is synthetic ?
  • a) 2-4-D
  • b) IBA
  • c) IAA
  • d) GA
Q.22
Which type of growth is seen in plants?
  • a) Local
  • b) Reversible
  • c) Irreversible
  • d) Increase in volume
Q.23
Which of the following is long-day plant ?
  • a) Oat
  • b) Soyabean
  • c) Vinca
  • d) Paddy
Q.24
How can a biannual plant be converted into an annual plant?
  • a) By giving more light
  • b) By cold process of seeds
  • c) By giving more temperature
  • d) By giving more oxygen
Q.25
Which of the following is example of amoeboid movement ?
  • a) Gamates of bryophyta
  • b) Hydrilla
  • c) Fungi
  • d) Algae
Q.26
Match the following :
Column I Column II
(P) Opening of leaf blade (i) Epinasty
(Q) Closing of leaves (ii) Hyponasty
(R) Zigzag movement in apical bud (iii) Nutation
(S) Spiral and helical growth of tendrilar plants (iv) Circumnutation
(T) Pulsation in leaflets of indian telegraph plant (v) Variation
  • a) (P-i), (Q-ii), (R-iii), (S-iv), (T-v)
  • b) (P-v), (Q-iv), (R-iii), (S-ii), (T-i)
  • c) (P-v), (Q-i), (R-iv), (S-iii), (T-ii)
  • d) (P-v), (Q-i), (R-iv), (S-ii), (T-iii)
Q.27
Which is natural growth inhibitor or senescence inducing hormone ?
  • a) GA
  • b) ABA
  • c) NAA
  • d) IAA
Q.28
What is apical dominance?
  • a) Removal of apical bud hinders growth of lateral buds
  • b) Development of lateral buds hinders due to presence of apical bud
  • c) Growth of apical bud is inhibited due to nearby lateral buds
  • d) Growth of apical bud is promoted due to removal of nearest lateral buds
Q.29
Which of the following is simple, volatile hormone ?
  • a) Cytokinin
  • b) ABA
  • c) Ethylene
  • d) IAA
Q.30
Zeatin is an example of
  • a) Gibberrellin
  • b) Auxin
  • c) Cytokinin
  • d) ABA
Q.31
Which hormone is absent in dormnant seed ?
  • a) Ethylene
  • b) ABA
  • c) GA
  • d) Auxin
Q.32
Which substances are secreted at the apex of plant and they regulates growth of another region ?
  • a) Hormones
  • b) Vitamins
  • c) Enzymes
  • d) None of the above
Q.33
What is the maximum period of growth ?
  • a) Slow growth rate
  • b) Steady growth rate
  • c) Speedy growth rate
  • d) Senescence phase
Q.34
With which reaction Phytochrome is associated ?
  • a) Photo-period
  • b) Geotropism
  • c) Photorespiration
  • d) Phototropism
Q.35
What is responsible for opening and closing of tulip flower ?
  • a) Nictinasty
  • b) Photonastic movement
  • c) Geotropism
  • d) Thermonasty
Q.36
Which of the following is found in high concentration in healthy leaf ?
  • a) Ethylene
  • b) Cytokinin
  • c) Auxin
  • d) Gibberrelin
Q.37
Which activity in plant is observed due to ethylene ?
  • a) Maturation of flower
  • b) Maturation of fruit
  • c) Matutiation of leaf
  • d) Maturation of seeds
Q.38
Which of the following is water stress hormone? ( BHU 1998)
  • a) Abscisic acid
  • b) 2,4- dichlorophenoxy acetic acid
  • c) Benzyl amino purine
  • d) Ethylene
Q.39
What is the colour of Phytochrome pigment ?
  • a) Red
  • b) Yellowish green
  • c) Bluish
  • d) Pink
Q.40
In which type of dormancy, due to hardness of seed coats or integuments, embryo could not expand during germination ?
  • a) Chemical dormancy
  • b) Mechanical dormancy
  • c) Physical dormancy
  • d) External dormancy
Q.41
When is abscission- layer formed? (AIIMS- 1980)
  • a) With increased concentration of auxin
  • b) With increased concentration of gibberrelin
  • c) With decreased concentraton of gibberelin
  • d) With decreased concentration of auxin
Q.42
What is the cause of `Bakane’ disease?
  • a) Fungi
  • b) Bacteria
  • c) Virus
  • d) Algae
Q.43
Sensitivity of leaves in Mimosa, depends on which factor ?
  • a) Water
  • b) Touch
  • c) Temperature
  • d) Light
Q.44
This hormone induces growth of root but inhibits growth of .......
  • a) Root
  • b) Lateral buds
  • c) Apical bud
  • d) Unfertilized fruit developement
Q.45
Which of the following is criteria for measurement of growth ?
  • a) Volume
  • b) Number
  • c) Weight
  • d) All a, b, c
Q.46
Which of the example is improper for tropic movement ?
  • a) Volvox
  • b) Mimosa
  • c) Antherozoids of pteridophytes
  • d) Antherozoids of bryophytes
Q.47
Which of the following is correct option for seed germination ?
  • a) Emergance of primary root forms from radicle
  • b) Development of primary root
  • c) No root formation
  • d) Emergance of radicle from primary root
Q.48
Which of the following effect of gibberrelin is observed in plant ?
  • a) Induces formation of root system
  • b) Long plant shortens
  • c) Dwarf plant grows in longitudinal axis
  • d) Yellowing of young leaves
Q.49
Which type of dormancy, inhibits embryo growth and germination in seed ?
  • a) Mixed dormancy
  • b) Endogenous dormancy
  • c) External dormancy
  • d) Physiological dormancy
Q.50
Which physilogical reaction is essential for development leaftendril ?
  • a) Circumnutation
  • b) Nastism
  • c) Curvature
  • d) Tropism
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