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Plant Growth and Development mcq. We covered all the Plant Growth and Development mcq in this post for free so that you can practice well for the exam.
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mcq on Plant Growth and Development for NEET Students
Over-ripening of bananas due to excess oxygen availability, also called respiratory climactic, is mainly caused by
a) Auxin
b) Cytokinin
c) Ethylene
d) Gibberellin
Option c – Ethylene
Spraying gibberellins on grape stalks results in
a) Elongation of the stalk
b) Faster ripening
c) Reduced stalk length
d) Early shedding of the stalk
Option a – Elongation of the stalk
Which of the following is NOT true about ethylene?
a) It is a gaseous plant hormone
b) It effectively promotes fruit ripening
c) It extends the shelf life of apples and tomatoes
d) It triggers flowering in mango plants
Option c – It extends the shelf life of apples and tomatoes
Consider the following:
Statement I: In plants that are not Light-sensitive, flowering is not influenced by day length.
Statement II: Short-day plants need more than a specific critical Light duration for flowering.
Which is true?
a) Only Statement I
b) Only Statement II
c) Both Statement I and Statement II
d) Neither Statement I nor Statement II
Option a – Only Statement I
Which of the following processes is NOT regulated by auxins?
a) Response to Light (phototropism)
b) Photorespiration
c) Plant growth
d) Apical dominance
Option b – Photorespiration
Plants such as maize, spinach, and cotton need longer daylight to bloom, hence they are
a) Long-day plants
b) Short-day plants
c) Day-neutral plants
d) Intermediate-day plants
Option a – Long-day plants
Which hormone helps in elongating sugarcane stems when applied?
a) Gibberellins
b) Auxins
c) Cytokinins
d) Abscisic Acid
Option a – Gibberellins
In beet and cabbage plants, bolting is encouraged by
a) Ethylene
b) Gibberellins
c) Abscisic Acid
d) Cytokinin
Option b – Gibberellins
To speed up fruit ripening, which hormone should be used?
a) Kinetin
b) Ethylene
c) Abscisic Acid (ABA)
d) Indole-3-butyric Acid (IBA)
Option b – Ethylene
In which part of the plant is auxin primarily produced?
a) Vascular tissues
b) Phloem only
c) Root and shoot apices
d) Xylem only
Option c – Root and shoot apices
Which hormone facilitates the development of seedless tomatoes?
a) Cytokinin
b) Ethylene
c) Auxin
d) Abscisic Acid
Option c – Auxin
Which of the following statements about plant growth is incorrect?
a) In arithmetic growth, all cells divide post-mitosis
b) Geometric growth involves both daughter cells continuing to divide
c) Arithmetic growth follows the equation L = Lo + rt
d) Embryos initially grow geometrically, then arithmetically
Option a – In arithmetic growth, all cells divide post-mitosis
A pea plant shows steady root growth. This represents
a) Exponential growth
b) Geometric growth
c) Arithmetic growth
d) None of these
Option c – Arithmetic growth
Find the incorrect statement about gibberellins:
a) Gibberellins shorten the maturity phase in young conifers
b) They cause axis swelling in seedlings
c) They increase the horizontal spread of a plant
d) They help elongate apples and improve shape
Option c – They increase the horizontal spread of a plant
When fully differentiated parenchyma cells develop into interfascicular cambium, the process is called
a) Differentiation
b) Dedifferentiation
c) Redifferentiation
d) Determination
Option b – Dedifferentiation
Coriander plants show different leaf shapes in juvenile and mature stages. This is an example of
a) Photoperiodism
b) Plasticity
c) Genetic drift
d) Differentiation
Option b – Plasticity
Identify the incorrect match between growth regulators and functions:
a) Auxins – Promote rooting in cuttings
b) Gibberellins – Slow down malting in brewing
c) Cytokinins – Reduce apical dominance
d) Ethylene – Raises Respiration during ripening
Option b – Gibberellins – Slow down malting in brewing
Auxin does NOT perform which of the following?
a) Assists in xylem formation
b) Induces flowering in pineapple
c) Increases Respiration during ripening
d) Promotes rooting in cuttings
Option c – Increases Respiration during ripening
F.W. Went first extracted auxin from
a) Rice seedlings
b) Tobacco stem nodes
c) Gibberella fujikuroi fungus
d) Oat coleoptiles
Option d – Oat coleoptiles
To remove dicot weeds in a wheat field, which weedicide should be applied?
a) Gibberellic Acid (GA3)
b) 2,4-D
c) Indole-3-acetic Acid (IAA)
d) Abscisic Acid (ABA)
Option b – 2,4-D
Which of the following is NOT involved in secondary plant growth?
a) Palisade parenchyma
b) Vascular cambium
c) Lateral meristem
d) Cork cambium
Option a – Palisade parenchyma
Which plant growth hormone naturally occurs as a gas?
a) Cytokinin
b) Gibberellin
c) Ethylene
d) Abscisic Acid
Option c – Ethylene
Internal regulators that manage plant growth and development are
a) Soil moisture retention
b) Plant hormones
c) Duration and intensity of Light
d) Nutrients and water availability
Option b – Plant hormones
When seeds start germinating inside the fruit still on the plant, the process is called
a) Oviparous
b) Epigeal
c) Hypogeal
d) Vivipary
Option d – Vivipary
Pick the incorrect statement related to plant growth:
a) It is a permanent change
b) It leads to a larger surface area
c) It is accompanied by metabolism
d) It stops completely once maturity is reached
Option d – It stops completely once maturity is reached
We covered all the plant growth and development mcq above in this post for free so that you can practice well for the exam.
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