Abscisic acid (ABA) |
a)
IAA
b) 2IP
c) GA3
d) dormin
2. Abscisic acid is also called as
a)
abscisin I
b) abscisin II
c) dormin
d)
all of the above
3. ABA regulates
a)
flowering
b) dormancy
c) ripening
d)
etiolation
4. The
active form of ABA is
a)
(+) cis ABA
b) (+) 2-trans
ABA
c) (+) cis 2 trans
ABA
d)
(+) trans ABA
5. The
precusrsor of ABA is
a)
violaxanthin
b) methionine
c) tryptophan
d)
carotenoids
6. Which
of the following is a bioassay for ABA
a)
chlorophyll preservation test
b) triple pea test
c) rice seedling growth inhibition test
d)
excised radish cotyledon enlargement test
7. All
the following are functions of ABA except
a)
induce dormancy
b) enhances abscission
c) involved in stress response
d)
cell elongation
8. ABA
stimulates release of
a)
auxin
b) ethylene
c) cytokinin
d)
GA
9. During
water stress rise in ABA levels initially cause
a)
stomatal opening
b) stomatal closure
c) reduced transpiration
d)
increased transpiration
10. Transport
of ABA takes place through
a)
xylem
b) phloem
c) endodermis
d)both
a and b
11. ABA
is an
a)
antiauxin
b) anti cytokinin
c) anti gibberellin
d)
ethylene inhibitor
12. Which
of the following hormone functions as an anti-transpirant?
a)
auxin
b) cytokinin
c) ABA
d) ethylene
13.
ABA is also called as
a)
stress hormone
b) ripening hormone
c) growth hormone
d)
none of these
14.
High levels of ABA are synthesized in
a)
tissues undergoing cell division
b) tissues undergoing cell elongation
c) tissues undergoing stress
d)
tissues undergoing ripening
15. ABA
synthesis begins in
a)
cytoplasm and chloroplast
b) chloroplast and amyloplast
c) cytoplasm and amyloplast
d) chloroplast and amyloplast
Answers :
Answers :
1-d
|
2-d
|
3-b
|
4-a
|
5-a
|
6-c
|
7-d
|
8-b
|
9-b
|
10-d
|
11-c
|
12-c
|
13-c
|
14-c
|
15-d
|
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MCQ on ABA
MCQ on Abscisic acid
MCQ on Phytohormones
mcq on Plant Hormones ABA
mcq plant hormones
multiple choice on ABA
multiple choice on Abscisic acid