Q.1.
Phytochrome is .... ... [ MPMT 1995]
-
67%
a) Pigment that controls photomorphogenesis and development
-
33%
b) Regulatory protein that controls dark dependent development process.
-
0%
c) Hormone
-
0%
d) Photosynthetic hormone
Q.2.
Rapid and dramatic increase in shoot length is ... .... [ JKCMEE 2007]
-
50%
a) Bolting
-
50%
b) Triple growth response
-
0%
c) Scarification
-
0%
d) Night break reaction
Q.3.
Jerky lateral leaflet movements of Desmodium gyrans are ... ... [ CPMT 1991]
-
50%
a) Negative geotropic movements
-
50%
b) Positive geotropic movements
-
0%
c) Hydrotropic movements
-
0%
d) None of the above
Q.4.
Growth in internodal regions of green plants is due to ... .... [ AFMC 2008]
-
0%
a) Ethylene
-
33%
b) Cytokinins
-
67%
c) Gibberellins
-
0%
d) IAA
Q.5.
One set of plants exposed to 12 hr day and 12 hr night flowered. The other set with similar exposure to day-night period but with dark period interrupted by flash or light did not come to flower. The plant is ... ... [ Pb PMT 2007]
-
0%
a) Long day
-
33%
b) Day neutral
-
33%
c) Indeterminate
-
33%
d) Short day
Q.6.
Sometimes Potato sprouts during storage due to formation of ... ..[ CET Chd 1997]
-
0%
a) Ethylene
-
0%
b) Gibberellin
-
100%
c) Cytokinin
-
0%
d) Auxin
Q.7.
Through their effect on phytohormones, temperature and light control ... ... [ CBSE 2012]
-
0%
a) Stomatal closure
-
50%
b) Apical dominance
-
50%
c) Flowering
-
0%
d) Fruit development
Q.8.
Gibberellins induce ... ... [ AIIMS 2005]
-
50%
a) Cell division
-
50%
b) Leaf senescence
-
0%
c) Hydrolysing enzymes in germination seeds
-
0%
d) Flowering
Q.9.
Cyanobacteria shows motion in response to light. ... ...
-
100%
a) Phototropism
-
0%
b) Photolysis
-
0%
c) Phototaxis
-
0%
d) Photonasty
Q.10.
Plant growth hormones extracted from a fungus and fish are respectively ... .. [ Tamil NAdu 2001]
-
100%
a) Gibberellins and zeatin
-
0%
b) Ethylene and cytokinin
-
0%
c) Auxin and 2-4-D
-
0%
d) Gibberellin and kinetin
Q.11.
Phytotron is a device by which ... ... [ Pb.PMT 2000 ]
-
0%
a) Electrons are bombarded
-
0%
b) Protons are liberated
-
100%
c) Plants are grown in controlled environment
-
0%
d) Mutations are produced in plants
Explanation
Q.12.
Abscisic acid causes ... .... [ CBSE 1991]
-
67%
a) Stomatal closure
-
33%
b) Stem elongation
-
0%
c) Leaf expansion
-
0%
d) Root elongation
Q.13.
Growth of both stem and root is mediated by auxin. However, stem grows into air while root grows into soil. The reason is ... ... [ CPMT 1990]
-
100%
a) Differential reaction of root and stem to auxin
-
0%
b) Only the stem tip produces auxin
-
0%
c) Only the root tip produces cytokinin
-
0%
d) Only the root cap can perceive gravity
Q.14.
Which of the following plant function is not controlled by auxins ... .... [ AMU 2010]
-
0%
a) Apical dominance
-
67%
b) Photosynthesis
-
0%
c) Photoperiodism
-
33%
d) Growth
Q.15.
6-furfuryl amino purine, 2,4-dichloro-phenoxy acetic acid and indole 3-acetic acid are ... ... [ AFMC 2009]
-
0%
a) Synthetic auxin, kinetin and natural auxin
-
100%
b) Gibberellin, natural auxin and kinetin
-
0%
c) Natural auxin, kinetin and synthetic auxin
-
0%
d) Kinetin, synthetic auxin and natural auxin
Q.16.
Plant growth is ... ... [ MPPMT 1999 ]
-
0%
a) Limited
-
100%
b) Unlimited
-
0%
c) Unlocalised
-
0%
d) Diffused
Q.17.
Photoperiodism influences ... .... [ MPPMT 2001]
-
67%
a) Seed germination
-
0%
b) Vegetative growth
-
33%
c) Internode elongation
-
0%
d) All the above
Q.18.
Gibberellins are ... ...[ KCET 2006]
-
50%
a) Proteinaceous
-
0%
b) Amines
-
50%
c) Acidic
-
0%
d) Alkaline
Q.19.
Photoperiodism was discovered by ... ... [ AMU 1998]
-
100%
a) W. Went
-
0%
b) F.F. Blackman
-
0%
c) Garner and Allard
-
0%
d) F.E. Fritsch
Q.20.
Match the column ... ... [ kerala 2009]
| a) Zeatin | Flowering hormone |
| b) Florigen | Synthetic auxin |
| c) IBA | Cytokinin |
| d) NAA | Natural auxin |
-
100%
a) a - 3, b - 1, c - 4, d - 2
-
0%
b) a - 4, b - 1, c - 2, d - 3
-
0%
c) a - 3, b - 4, c - 1, d - 2
-
0%
d) a - 2, b - 1. c - 4, d - 3
Q.21.
Phytochrome is involved in ... ...[ BHU 1991]
-
100%
a) Phototropism
-
0%
b) Photorespiration
-
0%
c) Photoperiodism
-
0%
d) Geotropism
Q.22.
Thigmonastic movement is found in ... ... [ Odisha 2007]
-
0%
a) Albizzia
-
0%
b) Oxalis
-
0%
c) Drosera
-
100%
d) Nepenthes
Q.23.
Bending of stem towards light is ... ... [ AFMC 1990]
-
100%
a) Photoperiodism
-
0%
b) Heliotropism
-
0%
c) Photonasty
-
0%
d) Hydrotropism
Q.24.
Kinetin is ... ... [ AIIMS 1996]
-
0%
a) Indolebutyric acid
-
0%
b) Indole acetic acid
-
0%
c) Butyric acid
-
100%
d) 6-furfuryl amino-purine
Q.25.
Seeds of some plants do not germinate even under favourable conditions due to ... .... [ HPPMT 2007]
-
50%
a) Dormancy
-
50%
b) Quiescence
-
0%
c) Vivipary
-
0%
d) Non-viability
Q.26.
Interfascicular cambium formation is induced by .... ... [ JIPMER 1996]
-
0%
a) Auxin
-
67%
b) Cytokinin
-
0%
c) Gibberellin
-
33%
d) Ethylene
Q.27.
r. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment? …[AIPMT 2014]
-
0%
a) It supports the hypothesis that IAA is auxin.
-
0%
b) It demonstrated polar movement of auxins.
-
0%
c) It made possible the isolation and exact identification of auxin.
-
100%
d) It is the basis for quantitative determination of small amounts of growth-promoting substances.
Q.28.
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows ? …[AIPMT 2015]
-
100%
a) Auxin accumulates on the shaded side, stimulating greater cell elongation there.
-
0%
b) Green plants need light to perform photosynthesis.
-
0%
c) Green plants seek light because they are phototropic.
-
0%
d) Light stimulates plant cells on the lighted side to grow faster.
Q.29.
Which of the following enhances or induces fusion of protoplasts ? …[AIPMT 2015]
-
0%
a) IAA and gibberellins
-
0%
b) Sodium chloride and potassium chloride
-
50%
c) Polyethylene glycol and sodium nitrate
-
50%
d) IAA and kinetin
Q.30.
The Avena curvature is used for bioassay of : …[AIPMT-2016]
-
0%
a) ABA
-
50%
b) GA3
-
50%
c) IAA
-
0%
d) Ethylene
Q.31.
During seed germination its stored food is mobilized by …[NEET 2013]
-
0%
a) Ethylene
-
50%
b) Cytokinin
-
50%
c) ABA
-
0%
d) Gibberellin
Q.32.
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots ? …[NEET 2016]
-
0%
a) Auxin and Abscisic acid
-
33%
b) Gibberellin and Abscisic acid
-
0%
c) IAA and gibberellin
-
67%
d) Auxin and cytokinin
Q.33.
Fruit and leaf drop at early stages can be prevented by the application of ….[NEET- 2017]
-
33%
a) Cytokinins
-
0%
b) Ethylene
-
0%
c) Auxins
-
67%
d) Gibberellic acid
Q.34.
Auxin can be bioassayed by : [ ReAIPMT 2015]
-
0%
a) Lettuce hypocotyl elongation
-
75%
b) Avena coleoptile curvature
-
0%
c) Hydroponics
-
25%
d) Potometer
Q.35.
Match the following:
| Column I | Column II |
| Auxin | a) Bolting in beet |
| Cytokinin | b) Apical dominance |
| Gibberellins | c) Breaks seed dormancy |
| Ethylene | d) Promote nutrient mobilisation |
-
25%
a) 1 → a; 2 → b; 3 → c; 4 → d
-
25%
b) 1 → b; 2 → c; 3 → d; 4 → a
-
50%
c) 1 → b; 2 → d; 3 → a; 4 → c
-
0%
d) 1 → d; 2 → b; 3 → a; 4 → c
Q.36.
Inhibitor B, abscission II and Dormin are the three kinds of inhibitors which are chemically identical. Identify the hormone?
-
0%
a) Auxin
-
67%
b) Abscisic acid
-
33%
c) Cytokinin
-
0%
d) Ethylene
Q.37.
How many of the following statements are correctly matched: (i) Auxin – cell division – apical dominance – selective weed killer. (ii) Gibberellins – cell elongation – synthesis of α amylase enzyme – terpene derivative. (iii) Cytokinin – cell division – bud formation – delay leaf senescence. (iv) Ethylene – gaseous growth regulator – breaking seed dormancy – respiratory climacteric. (v) Abscisic acid – stress hormone – induce dormancy – leaf abscission. {Question abmitted by Adhithyan js}
-
0%
a) 2
-
25%
b) 3
-
50%
c) 4
-
25%
d) 5
Q.38.
The ability of a plant to modify its organ, according to the environment and their life phases is called
-
40%
a) Heterophylly.
-
0%
b) Differentiation.
-
40%
c) Plasticity.
-
20%
d) Growth phases.
Q.39.
With reference to the diagram given below identify the incorrect statement: {Question abmitted by Adhithyan js}
-
0%
a) It is due to the habitation
-
33%
b) Shows heterophyllous development due to environment
-
0%
c) It is also called plasticity.
-
67%
d) It shows the heterophyllous condition in Buttercups
Q.40.
Development of permanent cells from primary meristematic cells is called: {Question abmitted by Adhithyan js}
-
0%
a) Plasticity.
-
50%
b) Differentiation
-
50%
c) Redifferentiaition.
-
0%
d) Dedifferentiation
Q.41.
Measurement and comparison of total growth per unit time is called: {Question abmitted by Adhithyan js}
-
67%
a) Absolute growth rate.
-
0%
b) Relative growth rate.
-
33%
c) Quantitative growth.
-
0%
d) Efficiency index.
Q.42.
Flowering can be inhibited in a biennial plant by: {Question abmitted by Adhithyan js}
-
33%
a) Exposing to sunlight.
-
0%
b) Giving additional nutrients.
-
0%
c) Protecting it from cold.
-
67%
d) Treatment with auxin.
Q.43.
Which of the following is not the character of plant growth? {Question abmitted by Adhithyan js}
-
0%
a) Indeterminate growth.
-
0%
b) Measurable growth.
-
83%
c) Determinate growth.
-
17%
d) Unlimited growth.
Q.44.
The conditions necessary for vernalization are: (i) High temperature and water. (ii) Low temperature and water. (iii) Water and Carbon dioxide. (iv) Oxygen and water.
-
100%
a) (i), (ii) and (iii)
-
0%
b)(i) and (ii)
-
0%
c) (ii) and (iv)
-
0%
d) (i) and (iii).
Q.45.
Auxins are mainly produced by:
-
0%
a) Root apical meristem
-
0%
b) Shoot apical meristem
-
0%
c) Lateral meristem
-
100%
d) Intercalary meristem
Q.46.
Find out the correct statements from the following: (i) All cells of plants are descendents of the zygote. (ii) Development is the sum of growth and differentiation. (iii) Growth is regarded as one of the most fundamental and conspicuous characteristics of a living being. (iv) Growth is reversible permanent increase in size of an organ or its parts. {Question abmitted by Adhithyan js}
-
0%
a) (i) and (ii)
-
0%
b) (i), (ii) and (iii)
-
100%
c) (i), (ii) and (iv)
-
0%
d) (ii) and (iii)
Q.47.
IAA is essential in all except: {Question abmitted by Adhithyan js}
-
0%
a) Apical hook formation.
-
0%
b) Apical dominance.
-
0%
c) Parthenocarpy in tomatoes.
-
100%
d) Xylem differentiation.
Explanation
Q.48.
Coconut milk can be used to: {Question abmitted by Adhithyan js}
-
100%
a) promote root growth and root hair formation.
-
0%
b) Promote senescence.
-
0%
c) Induce formation of male flowers.
-
0%
d) Counteract apical dominance.
Q.49.
Identify the wrong statement: {Question abmitted by Adhithyan js}
-
0%
a) The form of growth wherein new cells are always added to the plant body by the activity of meristem is called open form of growth.
-
0%
b) Secondary growth is observed in dicotyledonous plants and gymnosperms in their later life.
-
0%
c) One single maize root apical meristem can give rise to more than 17500 new cells per hour.
-
100%
d) Cells in watermelon may increase in size by upto 35000 times.
Q.50.
Which of the following is the measure of growth in pollen tube and a dorsiventral leaf?{Question abmitted by Adhithyan js}
-
0%
a) Growth of pollen tube is measured in terms of its width and an increase in surface area denotes growth in a dorsiventral leaf.
-
0%
b) Growth of pollen tube is measured in terms of its length and an increase in surface area denotes growth in a dorsiventral leaf.
-
0%
c) Growth of pollen tube is measured in terms of its width and an increase in mass to volume ratio denotes growth in a dorsiventral leaf.
-
100%
d) Growth of pollen tube is measured in terms of its length and an increase in mass to volume ratio denotes growth in a dorsiventral leaf.