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mcq on Plant Growth and Development. We covered all the mcq on Plant Growth and Development in this post for free so that you can practice well for the exam.
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Plant Growth and Development mcq for NEET Students
In which plant species do juvenile and mature leaves retain the same shape?
a) Coriander
b) Larkspur
c) Cotton
d) Mango
Option d – Mango
During which phase of plant growth do cells reach their maximum size with enhanced cell wall and protoplasm development?
a) Elongation phase
b) Meristematic phase
c) Secretory phase
d) Maturation phase
Option d – Maturation phase
Which environmental factor directly affects flowering in plants?
a) Chlorophyll content
b) Microbial Population in soil
c) Soil pH level
d) Duration of Light exposure
Option d – Duration of Light exposure
Choose the correct evaluation of the following:
Statement I: Ethylene assists plants in increasing water uptake.
Statement II: It also supports root and root hair development.
a) Only Statement I is true
b) Only Statement II is true
c) Both statements are false
d) Both statements are true
Option d – Both statements are true
Which hormone is commonly referred to as the stress hormone in plants?
a) Auxin
b) Cytokinin
c) Abscisic Acid
d) Ethylene
Option c – Abscisic Acid
Which hormone plays a key role in processes like dormancy and leaf fall?
a) Gibberellin
b) Cytokinin
c) Ethylene
d) Abscisic Acid
Option d – Abscisic Acid
What happens when a plant receives Light for a duration longer than its critical photoperiod?
a) Neither short-day nor long-day plants flower
b) Both types initiate flowering
c) Short-day plants fail to flower, but long-day plants do
d) Only short-day plants flower
Option c – Short-day plants fail to flower, but long-day plants do
Vernalization is observed in all listed crops except
a) Cabbage
b) Carrot
c) Sugar beet
d) China rose
Option d – China rose
What is the likely outcome when a plant’s apex is removed?
a) The plant dies within hours
b) Flower production halts
c) No further fruits are formed
d) Growth becomes more lateral and bushy
Option d – Growth becomes more lateral and bushy
Identify the incorrect pair of growth parameter and example:
a) Maize root tip – Increase in surface area
b) Pollen tube – Increase in length
c) Watermelon – Cell enlargement
d) Dorsiventral leaf – Surface area increase
Option a – Maize root tip – Increase in surface area
What is the main role of cytokinins in plant development?
a) Induces bolting
b) Triggers cell division and delays aging
c) Promotes seed dormancy
d) Speeds up plant aging
Option b – Triggers cell division and delays aging
Which statement about ethylene is inaccurate?
a) It enhances root and root hair formation
b) Stimulates bolting in rosette-form plants
c) Aids in petiole elongation in rice
d) Helps synchronize pineapple fruit formation
Option b – Stimulates bolting in rosette-form plants
Which liquid is used for artificially ripening fruits by slowly releasing ethylene?
a) Propane
b) Auxin
c) Purine
d) Ethephon
Option d – Ethephon
Which method is NOT used to overcome seed dormancy?
a) Applying abscisic Acid
b) Physically scraping seeds with a knife
c) Use of gibberellic Acid
d) Abrasion of the seed coat
Option a – Applying abscisic Acid
Choose the incorrect match regarding cellular processes:
a) Formation of secondary xylem – Redifferentiation
b) Water conduction by tracheary elements – Differentiation
c) Cambium formation from mature parenchyma – Redifferentiation
d) Callus formation from parenchyma – Dedifferentiation
Option c – Cambium formation from mature parenchyma – Redifferentiation
Which two hormones are involved in beet bolting and controlling dicot weeds respectively?
a) IBA and 2,4-D
b) ABA and GA₃
c) GA and 2,4-D
d) NAA and IBA
Option c – GA and 2,4-D
Identify the type of growth curve shown by plants under natural conditions.
a) Linear curve
b) Sigmoid curve
c) Parabolic curve
d) Hyperbolic curve
Option b – Sigmoid curve
Which is the incorrect statement about cells at the root and shoot tips?
a) They constantly undergo division
b) They are in the elongation phase
c) They have prominent nuclei
d) They contain thin walls and many plasmodesmata
Option b – They are in the elongation phase
Which of the following produces the highest amount of ethylene?
a) Unripe apples
b) Freshly harvested potatoes
c) Bananas in the ripening phase
d) Green bananas
Option c – Bananas in the ripening phase
Which of the following is a correct description of senescence?
a) It’s the degeneration of plant parts
b) It occurs before plant maturity
c) It leads to cell death
d) Both a and c
Option d – Both a and c
Ethylene does NOT influence which of the following?
a) Lateral seedling growth
b) Swelling of seedling axis
c) Inhibition of germination in peanuts
d) Formation of apical hooks in dicot seedlings
Option c – Inhibition of germination in peanuts
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