Q.1
Which of the following statement is true for abscisic acid ?
  • a) Acts as weedicide
  • b) Inhibits transcription of gene
  • c) Reduces senescence
  • d) Opens stomata
Q.2
Give full form of 2-4-D
  • a) 2-4 dichloro butyric acid
  • b) 2-4 dichloro nepthalic acetic acid
  • c) 2-4 dichloro ethylenic acid
  • d) 2-4 dichloro phenoxy acetic acid
Q.3
Which are the part labelled as A, B and C sequentially in the figure ?
unit-4_ch-7_que_no-141_img_no1.png
  • a) Plumule, radicle, cotyledon
  • b) Seed coat, cotyledon, plumule
  • c) Seed coat, Endosperm, plumule
  • d) Cotyledon, plumule, embryo
Q.4
Which is the correct sequence for different phases of growth?
  • a) Cell differentiation- cell elongation- cell formation
  • b) Cell differentiation- cell formation- cell elongation
  • c) Cell formation of cell differentiation- cell elongation
  • d) Cell formation - cell elongation- cell differentiation
Q.5
Demonstration of cytoplasmic movement in living cell can be observed in ........
  • a) Leaf cells of tradescantia
  • b) Cells of vascular bundle
  • c) Onion cells
  • d) Medullary cells
Q.6
From the given below which is short-day plant ?
  • a) Wheat
  • b) Oat
  • c) Paddy
  • d) Opium
Q.7
Ethylene is responsible for
  • a) Flowering
  • b) Formation of fruits
  • c) Disease in roots
  • d) Ripping of fruits
Q.8
Which hormones are obtained from fungi and fish, respectively ?
  • a) Gibberrelin and 2-4 D
  • b) Gibberrelin and cytokinin
  • c) IAA and IBA
  • d) Gibberrelin and zeatin
Q.9
Which of the following hormone is responsible for cell division ?
  • a) IAA
  • b) GA
  • c) Abscisic acid
  • d) Cytokinin
Q.10
Which hormone is responsible for apical dominance?
  • a) Auxin
  • b) Ethylene
  • c) Gibberrelin
  • d) Cytokinin
Q.11
In the absence of light, amount of which of the following is increased ?
  • a) Absorption of mineral salts
  • b) Absorption of water
  • c) Elongation of internodes
  • d) Ascent of sap
Q.12
hich apparatus is used for measurement of growth ?
  • a) Potometer
  • b) Auxanometer
  • c) Photometer
  • d) Hydrometer
Q.13
What is indicated by any of the developing plant if it increase / hyperactivity in lateral buds ?
  • a) It stores more food
  • b) It obtains more light
  • c) Auxin decreases
  • d) Cytokinin decreases
Q.14
How gibberrelin accelerates seed germination ? (AIIMS 2005)
  • a) Abscisic acid
  • b) Absorption of water from hard seed coat
  • c) By the synthesis of digestive juice
  • d) By effecting rate of cell division
Q.15
Which hormone affects the growth of plant in adverse climatic / environmental condition ?
  • a) 2-4, D
  • b) Ethylene
  • c) Abscisic acid
  • d) NAA
Q.16
Motor cells of leaves and grass, shows which type of movement ? (AIIMS-1996)
  • a) Osmotic movement
  • b) Growth movement
  • c) Locomotory movement
  • d) Nastic movement
Q.17
Which of the following type is improper for nastism ?
  • a) Hydronasty
  • b) Thermonasty
  • c) Photonasty
  • d) Phototropism
Q.18
Growth regulators are chemically ........
  • a) Minerals
  • b) Inorganic chemicals
  • c) Organic chemicals
  • d) Vitamins
Q.19
What is initiative substance of IAA?
  • a) Phehyl alamine
  • b) Tryptophan
  • c) Tyrosine
  • d) Lucine
Q.20
What is 2-4 D ?
  • a) Weedicide
  • b) Insecticide
  • c) Rodenticide
  • d) Wormicide
Q.21
Which hormone is responsible for bolting ?
  • a) Auxin
  • b) Gibberrelin
  • c) Cytokinin
  • d) Ethylene
Q.22
Which of the following physiological process performed by gibberrelic acid?
  • a) Yellowing of young leaves
  • b) Dwarfism of tall plant genetically
  • c) Growth in size of stem and root formation
  • d) Elongation of short plant genetically
Q.23
Which hormone is synthesized by root and endosperm?
  • a) Ethylene
  • b) Cytokinin
  • c) Gibberrelin
  • d) Auxin
Q.24
Match the list :
Column I Column II
(P) Lotus and sunflower (i) Hydronasty
(Q) Crocus and tulip (ii) Thigmonasty
(R) Due to turgidity of leauses (iii) Thermonasty
(S) Mimosa (iv) Photonasty
  • a) (P-iv), (Q-iii), (R-i), (S-iii)
  • b) (P-i), (Q-ii), (R-iii), (S-iv)
  • c) (P-ii), (Q-iii), (R-iv), (S-i)
  • d) (P-i), (Q-iii), (R-ii), (S-iv)
Q.25
Which of the following plant shows rotational movement ?
  • a) Chlamydomonas
  • b) Hydrilla
  • c) Volvox
  • d) Mucilagenous fungi
Q.26
Which of the following show movement by chemical ?
  • a) Male gametes of bryophytes and pteridophytes
  • b) Male gamets of fungi and algae
  • c) Male gametes of gymanosperm and and angiosperms
  • d) Flower of tulip and croccus
Q.27
Which hormone inhibits senescence of vegetative parts and plants ? Explanation is providede please click on
  • a) Auxin
  • b) Cytokinin
  • c) Gibberrelin
  • d) Abscisic acid
Q.28
State the full form of IAA (NCRT 1974)
  • a) Indole- 3 acetic anhydrase
  • b) Indole-3 acetic acid
  • c) Indole- 3 aceto acetate
  • d) Indole-3 aceto-acetic
Q.29
One plant group kept for 12 hrs in day and 12 hrs in night and flowering is observed in it. Another plant group is kept similarly for day - night period and for very short time light is given during dark period it do not flower. What is such type of plant called ? (CBSE 2004)
  • a) Medium-day plants
  • b) Long-day plants
  • c) Day-neutral plants
  • d) Short-day plants
Q.30
If apical region of stem is removed from any plant, what is observed?
  • a) Plant dies
  • b) Lateral branches emerges
  • c) New apical bud formation
  • d) Length of main stem increases
Q.31
Which of the following option shows an examples of cilliary movement ?
  • a) Slime mould
  • b) Chlamydomonas
  • c) Zoo spores and Bryophyta
  • d) All the three a, b, c
Q.32
In which structure thigmonasty is observed in simple form ?
  • a) Shoot apex
  • b) Leaf apex
  • c) Root apex
  • d) Leaf tendril
Q.33
What is agent Orange ? (CBSE 1998, AIMS 1999)
  • a) Insectide which is biodegradable
  • b) Colour used in tube light
  • c) Weedicide with dioxin
  • d) Chemical used in luminiscent plant
Q.34
Which of the hormone is synthetic ? ( AIIMS 1996,)
  • a) GA2
  • b) GA3
  • c) IAA
  • d) 2-4 D
Q.35
Which chemical induces formation of adventitious roots ?
  • a) Cytokinins
  • b) Gibberrelin
  • c) Abscisic acid
  • d) IAA
Q.36
Spiral developement of tendrils?
  • a) Thigmotropism
  • b) Thermotropism
  • c) Hydrotropism
  • d) Phototropism
Q.37
What is the direction of tropism ?
  • a) Directional
  • b) Straight
  • c) Undirectional
  • d) Oblique
Q.38
Match the list :
Column I Column II
(P) Plasmodium of slime mould (i) Ciliary movement
(Q) Chlamydomonas algae (ii) Circular movement
(R) protoplasm of tradenschantia leaf (iii) Rotational movement
(S) Protoplasm of hydrilla (iv) Amoeboid movement leaves
  • a) (P-i), (Q-ii), (R-iii), (S-iv)
  • b) (P-iv), (Q-iii), (R-iv), (S-i)
  • c) (P-iv), (Q-i), (R-ii), (S-iii)
  • d) (P-iv), (Q-ii), (R-i), (S-iii)
Q.39
One plant group kept for 12 hrs in day and 12 hrs in night and flowering is observed in it. Another plant group is kept similarly for day - night period and for very short time light is given during dark period it do not flower. What is such type of plant called ? (CBSE 2004)
  • a) Medium-day plants
  • b) Short-day plants
  • c) Long-day plants
  • d) Day-neutral plants
Q.40
Which hormone is responsible for growth of leaf-apex ?
  • a) IAA
  • b) Zeatin
  • c) Gibberrelin
  • d) Ethylene
Q.41
What is the required temperature for growth in most of the plants?
  • a) 20-30°C
  • b) 15-20°C
  • c) 10-15°C
  • d) 35-40°C
Q.42
Name the hormone responsible for activity of chlorophyll in leaves.
  • a) Gibberrelin
  • b) Cytokinin
  • c) ABA
  • d) Ethylene
Q.43
Vernalization is
  • a) Daily photo period
  • b) Effect of photoperiod on the growth of plant, which results flowering
  • c) Rapid growth in low temperature
  • d) Growth graph related to light
Q.44
Which of the following is used to enhance colour of fruits and more juice in fruits unnaturally?
  • a) kinetin
  • b) Sodium chloride
  • c) IAA
  • d) Ethylene gas
Q.45
With, what nutation is related ?
  • a) Induced curvature movement
  • b) Autonomous movement
  • c) Autonomous curvature movement
  • d) Induced movement
Q.46
By which physiological process water enters into seed coats of seed ?
  • a) Plasmolysis
  • b) Imbibition
  • c) Endosmosis
  • d) Diffusion
Q.47
If temporary light is made available for dark phase of long day plant, what is observed ?
  • a) Flowering will not occur
  • b) No change
  • c) Decreasing in flowering
  • d) Increase in flowering
Q.48
What is the rate of respiration during seed germination ?
  • a) Rapid
  • b) Steady
  • c) Slow
  • d) Zero
Q.49
Where is phytochrome pigment present ?
  • a) Bryophyta
  • b) Fungi
  • c) Algae
  • d) Phanerogams
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