Topic wise MCQ test for MHT-CET and NEET
7. Plant Growth and Mineral Nutrition
(1)
Which of the hormone can replace vernalization?
(a)
Auxin
(b)
Cytokinin
(c)
Gibberellins
(d)
Ethylene
Answer:
- (c)
Gibberellins
(2)
The principle pathway of water translocation in angiosperms is ……… .
(a)
Sieve cells
(b)
Sieve tube elements
(c)
Xylem
(d)
Xylem and phloem
Answer:
- (c) Xylem
(3)
Abscissic acid controls ……… .
(a) cell division
(b) leaf fall and dormancy
(c) shoot elongation
(d) cell elongation and wall
formation
Answer:
- (b) leaf fall and dormancy
(4)
Which is employed for artificial ripening of banana fruits ?
(a)
Auxin
(b)
Ethylene
(c)
Cytokinin
(d)
Gibberellin
Answer:
- (b)
Ethylene
(5)
Which of the following is required for stimulation of flowering in plants ?
(a)
Adequate oxygen
(b)
Definite photoperiod
(c)
Adequate water
(d)
Water and minerals
Answer:
-(b)
Definite photoperiod
(6)
For short day plants, the critical period is ……… .
(a)
light
(b)
dark/night
(c)
U V rays
(d)
Both (a) and (c)
Answer:
- (b)
dark/night
(7)
Which of the following is NOT day neutral plant ?
(a)
Tomato
(b)
Cotton
(c)
Sunflower
(d)
Soybean
Answer:
-(d)
Soybean
(8)
Essential macro elements are ……… .
(a)
manufactured during photosynthesis
(b)
produced by enzymes
(c)
obtained from soil
(d)
produced by growth hormones
Answer: - (c) obtained from soil
(9)
Function of Zinc is ……… .
(a)
closing of stomata
(b)
biosynthesis of 3-IAA
(c)
synthesis of chlorophyll
(d)
oxidation of carbohydrates
Answer:
- (b) biosynthesis
of 3-IAA
(10)
Necrosis means ……… .
(a)
yellow spot on the leaves
(b) death of tissue
(c)
darkening of green colour in leaves
(d)
wilting of leaves
Answer:
- (b) death of tissue
(11) Conversion of nitrates to nitrogen is
called ……… .
(a)
ammonification
(b)
nitrification
(c)
nitrogen fixation
(d)
denitrification
Answer: - (d) denitrification
(12)
How many molecules of ATP are required to fix one molecule of nitrogen ?
(a)
12
(b)
20
(c)
6
(d)
16
Answer:
- d) 16
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(13)
For the following, which is the aspect of growth ? Example – Increase in
length, size and number of cells.
(a)
Quantitative
(b)
Qualitative
(c)
Both (a) and (b)
(d)
Three dimensional
Answer:
-(a)
Quantitative
(14)
In vascular plants, growth takes place due to ……… .
(a)
conducting tissues
(b)
embryo
(c)
meristems
(d)
stem cell
Answer: - (c) meristems
(15)
What is growth ?
(a) Temporary, irreversible increase
in an organism.
(b) Permanent, reversible increase in
an organism.
(c) Permanent, irreversible decrease
in an organism.
(d) Permanent, irreversible increase
in an organism.
Answer:
- (d) Permanent,
irreversible, increase in an organism
(16)
Based on location, plants have these three types of meristems.
(a) Basal, Intercalary and Lateral
(b) Apical, Basal and Lateral
(c) Apical, Interfascicular and
Lateral
(d) Apical, Intercalary, Lateral
Answer:
-(d)
Apical, Intercalary, Lateral
(17)
Meristem cells are ……… .
(a) thin walled, vacuolated with
prominent nucleus
(b) thick walled, non-vacuolated
without nucleus
(c) thin walled, non-vacuolated with
prominent nucleus
(d) thick walled, vacuolated with
prominent nucleus
Answer:
- (c)
thin walled, non-vacuolated with prominent nucleus
(18)
Select correct sequence of phases of growth.
(a) Phase of formation, phase of
elongation, phase of maturation
(b) Phase of cell division, phase of
enlargement, phase of elongation
(c) Phase of formation, phase of
maturation, phase of elongation
(d) Phase of enlargement, phase of
cell division, phase of maturation
Answer:
-(a)
Phase of formation, phase of elongation, phase of maturation
(19)
In which phase of growth, growth rate is at accelerated pace ?
(a) Lag phase
(b) Log phase
(c) Steady phase
(d) Stationary phase
Answer:
-(b)
Log phase
(20)
Water is essential for growth because it is necessary ……… .
(a) for turgidity
(b) as nutrient
(c) as raw material
(d) for gravity
Answer:
-(a)
for turgidity
(21)
Which equipment is suitable for measuring linear growth of shoot ?
(a) Horizontal microscope
(b) Spectroscope
(c) Crescograph
(d) Auxanometer
Answer: - (d) Auxanometer
(22)
Which is correct expression of absolute growth rate (AGR) ?
(a) AGR = dn/dt
(b) AGR = dt/dn
(c) AGR = RGR/n
(d) AGR = n/RGR
Answer:
-(a)
AGR = dn/dt
(23)
Arithmetic growth in plants shows ……… graph.
(a)
Sigmoid
(b)
J-shaped
(c)
linear
(d)
elliptical
Answer: -(c) linear
(24)
What is grand period of growth ?
(a)
The total time required for all phases to occur
(b)
The total time required for exponential phase
(c)
The total time required for Lag and Log phase together
(d)
The total time required for stationary phase
Answer:
- (a)
The total time required for all phases to occur
(25)
Which tissue is formed by process of dedifferentiation ?
(a)
Intrafascicular cambium
(b)
Secondary phloem
(c)
Interfascicular cambium
(d)
Secondary xylem
Answer:
- (c)
Interfascicular cambium
(26)
The example of environmental plasticityheterophylly observed is
(a) Cotton
(b) Coriander
(c) Larkspur
(d) Buttercup
Answer:
- (d)
Buttercup
(27)
Synthesis of IAA takes place from amino acid ……… .
(a) Methionine
(b) Tryptophan
(c) Valine
(d) Aspartic acid
Answer:
-(b)
Tryptophan
(28)
Find the odd one out.
(a)
IAA
(b)
2, 4-D
(c)
NAA
(d)
IBA
Answer: - (a) IAA
(29)
The selective herbicide is ……… .
(a)
IBA
(b)
GA3
(c)
2, 4 D
(d)
NAA
Answer: - (c) 2, 4 D
(30)
This hormone promotes rooting in artificial method of cutting ……… .
(a)
Gibberellin
(b)
Auxin
(c)
Cytokinin
(d)
Dormin
Answer: -(b) Auxin
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