Plant Growth And Development
339 Questions
Start Allen Test
Q276
Allen
ANALYTICAL QUESTIONS
MCQ
Which of the following activities does not involve the role of GA?
A.
Seed germination
B.
Malting
C.
Root growth
D.
Flowering in LDPs
Q277
Allen
ANALYTICAL QUESTIONS
MCQ
Removal of shoot tips (decapitation) usually results in the growth of lateral buds. It is related to the removal of effect of which plant hormone?
A.
Ethylene
B.
Auxin
C.
Cytokinin
D.
Gibberellic acid
Q278
Allen
ANALYTICAL QUESTIONS
MCQ
Which plant hormone promotes the growth of lateral buds ?
A.
Auxin
B.
Cytokinin
C.
Gibberellin
D.
Abscisic acid
Q279
Allen
ANALYTICAL QUESTIONS
MCQ
Hormone involved in induction of Ī±-amylase in Barley endosperm :-
A.
GA
B.
NAA
C.
Ethylene
D.
ABA
Q280
Allen
ANALYTICAL QUESTIONS
MCQ
How does pruning help in making the hedge dense
A.
The apical shoot grows faster after pruning
B.
It releases wound hormones
C.
It induces the differentiation of new shoots from the root stock
D.
It frees axillary buds from apical dominance
Q281
Allen
ANALYTICAL QUESTIONS
MCQ
Parthenocarpic tomato fruits can be produced by?
A.
raising the plants from vernalized seeds
B.
treating the plants with phenylmercuric acetate
C.
removing androecium of flowers before pollen grains are released
D.
treating the plants with low concentrations of gibberellic acid and auxins
Q282
Allen
ANALYTICAL QUESTIONS
MCQ
An enzyme that can stimulate germination of barley seeds is
A.
Protease
B.
Invertase
C.
Ī±-amylase
D.
Lipase
Q283
Allen
ANALYTICAL QUESTIONS
MCQ
Which one of the following pairs, is not correctly matched?
A.
IAA - Cell wall elongation
B.
Abscisic acid - Stomatal closure
C.
Gibberellic acid - Leaf fall
D.
Cytokinin - Cell division
Q284
Allen
ANALYTICAL QUESTIONS
MCQ
"Foolish seeding" disease of rice led to the discovery of: -
A.
IAA
B.
GA
C.
ABA
D.
2, 4-D
Q285
Allen
ANALYTICAL QUESTIONS
MCQ
Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in: -
A.
Annual plants
B.
Floral parts
C.
Vessels and tracheid differentiation
D.
Leaf abscission
Q286
Allen
ANALYTICAL QUESTIONS
MCQ
One of the synthetic auxin is: -
A.
IAA
B.
GA
C.
IBA
D.
NAA
Q287
Allen
ANALYTICAL QUESTIONS
MCQ
Which one of the following acids is a derivative of carotenoids?
A.
Indole-3-acetic acid
B.
Gibberellic acid
C.
Abscisic acid
D.
Indole butyric acid
Q288
Allen
ANALYTICAL QUESTIONS
MCQ
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is: -
A.
Differentiating
B.
Maturing
C.
Elongating
D.
Widening
Q289
Allen
ANALYTICAL QUESTIONS
MCQ
Phototropic curvature is the result of uneven distribution of:
A.
Gibberellin
B.
Phytochrome
C.
Cytokinins
D.
Auxin
Q290
Allen
ANALYTICAL QUESTIONS
MCQ
Root development is promoted by:
A.
Auxin
B.
Gibberellin
C.
Ethylene
D.
Abscisic acid
Q291
Allen
ANALYTICAL QUESTIONS
MCQ
Which one of the following generally acts as an antagonist to gibberellins?
A.
ABA
B.
IAA
C.
Zeatin
D.
Ethylene
Q292
Allen
ANALYTICAL QUESTIONS
MCQ
Through their effect on plant growth regulators, what do the temperature and light control in the plants?
A.
Closure of stomata
B.
Fruit elongation
C.
Apical dominance
D.
Flowering
Q293
Allen
ANALYTICAL QUESTIONS
MCQ
Assertion : Gibberellins promote bolting in beet, cabbages and many plants with rosette habit. Reason : It promotes internode elongation just prior to flowering.
A.
Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B.
Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C.
Assertion is True but the Reason is False.
D.
Both Assertion & Reason are False.
Q294
Allen
ANALYTICAL QUESTIONS
MCQ
Assertion : Plants retain the capacity for unlimited growth throughout their life. Reason : Plants have meristems in their body.
A.
Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B.
Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C.
Assertion is True but the Reason is False.
D.
Both Assertion & Reason are False.
Q295
Allen
ANALYTICAL QUESTIONS
MCQ
Assertion: Cytokinin helps in the delay of leaf senescence. Reason: Cytokinin promote nutrient mobilisation.
A.
Both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B.
Both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C.
Assertion is True but the Reason is False.
D.
Both Assertion & Reason are False.
Q296
Allen
ANALYTICAL QUESTIONS
MCQ
Match the following :
| Column-I | Column-II | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
A.
a-i, b-ii,c-iii,d-iv,e-v
B.
a-ii,b-i, c-v,d-iii,e-iv
C.
a-v, b-iv,c-iii,d-ii,e-i
D.
a-iv,b-iii,c-i,d-ii,e-v
Q297
Allen
ANALYTICAL QUESTIONS
MCQ
The given figures shows the growth of two leaves in a given time. If, AGR = absolute growth and RGR = relative growth rate, then select the correct option :-
(A)
(B)
(B)
A.
AGR for leaf A ā 5, RGR for leaf A ā 5%, AGR for leaf B ā 5, RGR for leaf B ā 5%
B.
AGR for leaf A ā 10, RGR for leaf A ā 10%, AGR for leaf B ā 55, RGR for leaf B ā 10%
C.
AGR for leaf A ā 5, RGR for leaf A ā 100%, AGR for leaf B ā 5, RGR for leaf B ā 10%
D.
AGR for leaf A ā 5, RGR for leaf A ā 100%, AGR for leaf B ā 5, RGR for leaf B ā 100%
Q298
Allen
ANALYTICAL QUESTIONS
MCQ
What type of growth is represented in the following diagram ?
A.
Arithmetic
B.
Geometric
C.
Root elongation at a constant rate
D.
Both (1) & (2)
Q299
Allen
ANALYTICAL QUESTIONS
MCQ
Choose the correct option for A,B,C or D :-
A.
A - Primary growth
B.
B - Secondary growth
C.
C - Lateral growth
D.
D - Terminal
Q300
Allen
ANALYTICAL QUESTIONS
MCQ
One single maize root apical meristem can give rise to more than
A.
17,500 new cells per minute
B.
17,500 new cells per hour
C.
17,500 new cells per day
D.
17,500 new cells per week