Plant Growth & Development Q BANK

PLANT GROWTH & DEVELOPMENT Q BANK Question and answer based on strictly latest NCERT based pattern, and previous year NEET (AIPMT) question. chapter wise approach mcq is more useful for quick revision and increase speed for maintaining time period.

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MCQ:-

 


Q1) Fruit & leaf drop at early stages can be prevented by the application of (NEET 2017)

Cytokinins
Ethylene
Auxins
Gibberellic acid

Answer- Auxins

Q2) The Avena curvature is used for bioassay of (NEET 2016, PHASE I)

GA₃
IAA
Ethylene
ABA

Answer- IAA
Q3) Phytochrome is a   (NEET 2016,PHASE II)

Flavoprotein
Glycoprotein
Lipoprotein
Chromoprotein

Answer- Chromoprotein
Q4) 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,PHASE II)

IAA & gibberellin
Auxin & cytokinin
Auxin & abscisic acid
Gibberellin & abscisic acid

Answer- Auxin & cytokinin
Q5) Auxin can be bioassayed by   (CBSE AIPMT 2015)

Avena coleoptile curvature
Hydroponics
Potometer
Lettuce hypocotyl elongation

Answer- Avena coleoptile curvature

Q6) Dr. F Went noted that if coleoptile tips were removed & placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptiles stumps. Of what significance is this experiment?  (CBSE AIPMT 2014)

It made possible the isolation & exact identification of auxin
It is the basis for quantitative determination of small amounts of growth-promoting substances
It supports the hypothesis that IAA is auxin
It demonstrated polar movement of auxins

Answer- It is the basis for quantitative determination of small amounts of growth-promoting substances

Q7) Whichh one of the following growth regulators is known as ‘stress hormone’?  (CBSE AIPMT 2014, 1993)

Abscsic acid
Ethylene
GA₃
Indole acetic acid

Answer- Abscsic acid
Q8) A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them?  (CBSE AIPMT 2014)

Mutated
Embolished
Etiolated
Defoliated

Answer- Etiolated
Q9) During seed germination its stored food is mobilised by  (NEET 2013)

Ethylene
Cytokinin
ABA
Gibberellin

Answer- Gibberellin
Q10) Phototropic curvature is the result of uneven distribution of  (CBSE AIPMT 2010)

Gibberellin
Phytochrome
Cytokinins
Auxin

Answer- Auxin
Q11) Coiling of graden pea tendrils around any support is an example of  (CBSE AIPMT 2010,1995,91)

Thigmotaxis
Thigmonasty
Thigmotropism
Thermotaxis

Answer- Thigmotropism
Q12) One of the synthetic auxin is  (CBSE AIPMT 2009)

NAA
IAA
GA
IBA

Answer- NAA
Q13) Which one of the following acids is a derivative of carotenoids?  (CBSE AIPMT 2009)

Indole-butyric acid
Indole-3-acetic acid
Gibberellic acid
Abscisic acid

Answer- Abscisic acid
Q14) Senscense as an active developmental xellular process in the growth & functioning of a flowering plant, is indicated in  (CBSE AIPMT 2008)

Vessels & trachied differentiation
Leaf abscission
Annual plants
Floral parts

Answer- Leaf abscission
Q15) Importance of day length in flowering of plants was first shown in  (CBSE AIPMT 2008)

Lemna
Tobacco
Cotton
Petunia

Answer- tobacco



Q16) Opening of floral buds into flowers, is a type of    (CBSE AIPMT 2007)

Autonomic movement of locomotion
Autonomic movement of variation
Paratonic movement of growth
Autonomic movement of growth

Answer- Autonomic movement of growth
Q17) The wavelength of light absorbed by Pᵣ form of phytochrome is (CBSE AIPMT 2007)

640 nm
680 nm
720 nm
620 nm

Answer- 680 nm
Q18) ‘Foolish seedling’ disease of rice led to the discovery of  (CBSE AIPMT 2007)

GA
ABA
2,4 D
IAA



Answer- GA

Q19) Which one of the following pairs, is not correctly matched? (CBSE AIPMT 2007)

Abscisic acid        – Stomatal closure
Gibberellic acid   – Leaf fall
Cytokinin              – Cell division
IAA                        – Cell wall elongation

Answer- Gibberellic acid- Leaf fall
Q20) How does pruning help in making the hedge dense? (CBSE AIPMT 2006)

It frees axillary buds from apical dominance
The apical shoot grows faster after pruning
It releases wound hormones
It induces the differentiation of new shoots from the rootstock

Answer- It frees axillary buds from apical dominance
Q21) An enzyme that can stimulate germination of barley seeds is  (CBSE AIPMT 2006)

Lipase
Protease
Invertase
α-amylase

Answer- α-amylase
Q22) Treatment of seed at low temperature under moist conditions to break its dormancy is called (CBSE AIPMT 2006)

Vernalisation
Chelation
Stratification
Scarification

Answer- Stratificaton

Q23) Cell elongation in intermodal regions of the green plants takes place due to (CBSE AIPMT 2004)

Indole acetic acid
Cytokinins
Gibberellins
Ethylene

Answer- Gibberellins

Q24) Anthesis is a phenomenon which refers to (CBSE AIPMT 2004)

Reception of pollen by stigma
Formation of pollen
Development of anther
Opening of flower bud

Answer- Opening of flower bud

Q25) One set of a plant was grown at 12hr day   & 12hr night period cycles & it flowered while in the other set night phase was interrupted by flash of light & it did not produce flower. Under which one of the following categories will you place this plant?  (CBSE AIPMT 2004)

Long-day
Darkness neutral
Day neutral
Short-day

Answer- Short-day
Q26) Differentiation of shoot is controlled by  (CBSE AIPMT 2003)

High gibberellins – cytokinin ratio
High auxin – cytokinin ratio
High cytokinin – auxin ratio
High gibberellin – auxin ratio

Answer- High cytokinin – auxin ratio

Q27) Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone  (CBSE AIPMT 2003)

Abscisic acid
Auxin
Cytokinin
Ethylene

Answer- Auxin
Q28) Hormone responsible for senescence is (CBSE AIPMT 2001)

ABA
Auxin
GA
Cytokinin

Answer- ABA
Q29) Which of the following prevents fall of fruits?  (CBSE AIPMT 2001)

GA₃
NAA
Ethylene
Zeatin

Answer- NAA
Q30) Which breaks bud dormancy of potato tuber?  (CBSE AIPMT 2001)

Gibberellin
IAA
ABA
Zeatin

Answer- Gibberelin

Q31)Which one is a long-day plant?   (CBSE AIPMT 2001)

Tobacco
Glycine max
Mirabilis jalapa
Spinach

Answer- Spinach


Q32) Proteinaceous pigment which control activities concerned with light  (CBSE AIPMT 2001)

Phyochrome
Chlorophyll
Anthocyanin
Carotenoids

Answer- Phytochrome
Q33) The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded, is  (CBSE AIPMT 2000)

Vernalisation
Stratification
Denudation
Scarification

Answer- Scarification


Q34) What reason will you assign for coconut milk used in tissue culture?  (CBSE AIPMT 2000,03)

Gibberellins
Cytokinins
Auxins
Ethylene

Answer- Cytokinins
Q35) Geocarpic fruits are produced by   (CBSE AIPMT 2000,02)

Onion
Watermelon
Groundnut
Carrot

Answer- Groundnut
Q36) The closing & opening of the leaves of Mimosa pudica is due to   (CBSE AIPMT 1999)

Thermonastic movement
Hydrotropic movement
Seismonastic movement
Chemonastic movement

Answer- Seismonastic movement

Q37) Which combination of gases is suitable for fruit ripening?  (CBSE AIPMT 1998)

80%CO₂ & 20%CH₂
80%CH₄ & 20%CO₂
80%CO₂ & 20%O₂
80%C₂H₄ & 20%CO₂

Answer- 80%C₂H₄ & 20%CO₂


Q38) The response of different organisms to environmental rhythms of light & darkness is called  (CBSE AIPMT 1998)

Phototaxis
Photoperiodism
Phototropism
Vernalisation

Answer- Photoperiodism
Q39) A plant hormone used for inducing morphogenesis in plant tissue culture is  (CBSE AIPMT 1998)

Gibberellins
Cytokinins
Ethylene
Abscisic acid

Answer- Cytokinins

Q40) The pigment, that absorbs red & far-red light in plants is,  (CBSE AIPMT 1995,2002)

Xanthophylls
Cytochrome
Phytochrome
Carotene

Answer- Phytochrome