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Plant Growth And Development

339 Questions Start Allen Test
All Exams Allen Errorless
NEET 2024 Q1 Errorless Critical Thinking MCQ
Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin
A.
Promotes apical dominace
B.
Promotes abscission of mature leaves only
C.
Does not affect mature monocotyledonous plants
D.
Can help in cell division in grasses, to produce growth
NEET 2024 Q2 Errorless Critical Thinking MCQ
Formation of interfascicular cambium from fully developed parenchyma cells is an example for
A.
Differentiation
B.
Redifferentiation
C.
Dedifferentiation
D.
Maturation
NEET 2024 Q3 Errorless Critical Thinking MCQ
Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield
A.
Auxin
B.
Gibberellin
C.
Cytokinin
D.
Abscisic acid
NEET 2023 Q4 Errorless Critical Thinking MCQ
Which hormone promotes internode/petiole elongation in deep water rice
A.
Kinetin
B.
Ethylene
C.
2, 4-D
D.
GA3
NEET 2023 Q5 Errorless Critical Thinking MCQ
In tissue culture experiments, leaf mesophyll cells are put in a culture medium to form callus. This phenomenon may be called as
A.
Dedifferentiation
B.
Development
C.
Senescence
D.
Differentiation
NEET 2023 Q6 Errorless Critical Thinking MCQ
Spraying of which of the following phytohormone on juvenile conifers helps hastening the maturity period, that leads early seed production
A.
Gibberellic Acid
B.
Zeatin
C.
Abscisic Acid
D.
Indole-3-butyric Acid
NEET 2022 Q7 Errorless Critical Thinking MCQ
Production of cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants
A.
Ethylene
B.
Cytokinin
C.
ABA
D.
Gibberellin
NEET 2022 Q8 Errorless Critical Thinking MCQ
The gaseous plant growth regulator is used in plants to
A.
Help overcome apical dominance
B.
Kill dicotyledonous weeds in the fields
C.
Speed up the malting process
D.
Promote root growth and root hair formation to increase the absorption surface
NEET 2021 Q9 Errorless Critical Thinking MCQ
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called
A.
Flexibility
B.
Plasticity
C.
Maturity
D.
Elasticity
NEET 2020 Q10 Errorless Critical Thinking MCQ
The process of growth is maximum during
A.
Dormancy
B.
Log phase
C.
Lag phase
D.
Senescence
NEET 2020 Q11 Errorless Critical Thinking MCQ
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop
A.
Abscisic acid
B.
Cytokinin
C.
Gibberellin
D.
Ethylene
NEET 2020 Q12 Errorless Critical Thinking MCQ
Which of the following is not an inhibitory substance governing seed dormancy [NCERT Pg. No. 179]
A.
Para- ascorbic acid
B.
Gibberellic acid
C.
Abscisic acid
D.
Phenolic acid
NEET 2019 Q13 Errorless Critical Thinking MCQ
What is the site of perception of photoperiod necessary for induction of flowering in plants [NCERT Pg. No. 179] Or The site of perception of light in plants during photoperiodism is [MP PMT 1999; NEET 2021]
A.
Lateral buds
B.
Pulvinus
C.
Shoot apex
D.
Leaves
NEET 2019 Q14 Errorless Critical Thinking MCQ
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield
A.
Auxin and Ethylene
B.
Gibberellin and Cytokinin
C.
Gibberellin and Abscisic acid
D.
Cytokinin and Abscisic acid
NEET (Phase-II) 2016 Q15 Errorless Auxin MCQ
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
A.
Gibberellin and abscisic acid
B.
IAA and gibberellin
C.
Auxin and cytokinin
D.
Auxin and abscisis acid
WB JEE 2016 Q16 Errorless Critical Thinking MCQ
Seed dormancy can be broken by the following combination of chemicals
A.
GA3, IAA and ABA
B.
$K N O _ { 3 } , G A _ { 3 }$ and Ethylene chlorohydrin
C.
NAA, 2, 4,5 āˆ’T and IAA
D.
ABA, BAP and $G A _ { 3 }$
WB JEE 2016 Q17 Errorless Critical Thinking MCQ
Seedless fruits can be induced by
A.
ABA and IAA
B.
ABA and Zeatin
C.
IAA and $\mathsf { G A } _ { 3 }$
D.
Ethylene and ABA
MHCET 2015 Q18 Errorless Plant Growth Regulators MCQ
To induce formation of organs in a callus it is necessary to provide
A.
Growth hormones
B.
Water
C.
Soil
D.
Antibiotics
AIPMT (Cancelled) 2015 Q19 Errorless Critical Thinking MCQ
A green plant bends towards the source of light when exposed to the light on only one side, it bends towards the source of light as it grows. Which of the following is the best explanation of the phenomenon
A.
The apices of their stems are attracted by light
B.
They need light for photosynthesis
C.
Some auxins accumulates on the shaded side to induce greater cell elongation on that side
D.
Light stimulates the cells on the illuminated side to increase in length
KCET 2015 Q20 Errorless Critical Thinking MCQ
One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third increases the tolerance of plants to various stresses they are respectively
A.
Gibberellin, Auxin, Cytokinin
B.
Auxin, Gibberellins, Cytokinin
C.
Gibberellin, Auxin, ABA
D.
Auxin, Gibberellins, ABA 1--
AIPMT (Cancelled) 2015 Q21 Errorless Critical Thinking MCQ
Which of the following enhances or induces fusion of protoplasts
A.
Polyethylene glycol and sodium nitrate
B.
IAA and kinetin
C.
IAA and gibberellins
D.
Sodium chloride and potassium chloride
CBSE PMT 2014 Q22 Errorless Auxin MCQ
Dr. 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
A.
It supports the hypothesis that IAA is auxin.
B.
It demonstrated polar movement of auxins.
C.
It made possible the isolation and exact identification of auxin
D.
It is the basis for quantitative determination of small amounts of growth-promoting substances
NEET (Karnataka) 2013 Q23 Errorless Plant Growth Regulators MCQ
The pineapple which under natural conditions is difficult to blossom has been made to produce fruits throughout the year by application of
A.
NAA, 2, 4-D
B.
Phenyl acetic acid
C.
Cytokinin
D.
IAA, IBA
NEET (Karnataka) 2013 Q24 Errorless Critical Thinking MCQ
The viability of seeds is tested by
A.
2, 6 dichlorophenol indophenols
B.
2, 3, 5 triphenyl tetrazolium chloride
C.
DMSO
D.
Safranine
MP PMT 2013 Q25 Errorless Self Evaluation Test MCQ
In callus culture, roots can be induced by the supply of
A.
Auxin and no cytokinin
B.
Higher amounts of auxin and lower amounts of cytokinin
C.
Higher amounts of cytokinin and lower amounts of auxin
D.
Auxin and cytokinin in equal amounts