Multiple choice questions on plant hormone- Cytokinin
1.
Cytokinins are
3. The
first kinetin isolated by Miller was from
a)
adenine derivatives
b) guanine derivatives
c) cytidine derivatives
d) thymine derivatives
2. Which
of the following is a natural cytokinin?
a)
isopentanyl adenine
b) zeatin
c) 6-isopentanyl aenine
d)
6-amino purine
a)
coconut endosperm
b) maize grains
c) herring sperm DNA
d)
wheat grains
4. The
first natural cytokinin isolated from liquid endosperm was
a)
isopentanyl adenine
b) zeatin
c) 6-isopentanyl aenine
d)
6-amino purine
5. Agrobacterium tumefaciens Ti plasmids
t-DNA has genes for
a)
Auxin and gibberellins
b) cytokinin and ethylene
c) cytokinin and gibberellins
d)
Auxin and cytokinin
6. Which
of the following is the precursor of cytokinins
a)
adenine
b) guanine
c) cytidine
d) thymine
7. Cytokinin is predominantly present in
a)
permanent tissues
b) meristematic tissues
c) endodermis
d)
cortical region
8. All
are bioassays for cytokinin except
a)
chlorophyll preservation test
b) tobacco pith culture
c) rice seedling growth inhibition test
d)
excised radish cotyledon enlargement test
9. All
the statement are true regarding cytokinin except
a)
promote cell division
b) delay senescence
c) induce dormancy
d)
counteract apical dominance
10. Cytokinin
treatment enhances
a)
chlorophyll synthesis
b) chlorophyll degradation
c) protein degradation
d)
water uptake
11.
In tissue culture, high cytokinin to
auxin ratio causes |
| Cytokinin: Auxin ratio |
a)
root differentiation
b) shoot differentiation
c) both a and b
d)
none of these
12. In
tissue culture, low cytokinins to auxin ratio causes
a)
root differentiation
b) shoot differentiation
c) both a and b
d)
none of these
13. Translocation
of cytokinin is polar and takes place through
a)
xylem
b) phloem
c) both phloem and xylem
d)
capillary rise
14.
‘Pomalin’ is effective in increasing apple size and is a combination of
a)
Auxin and gibberellins
b) cytokinin and ethylene
c) cytokinin and gibberellins
d) Auxin and cytokinin
15. Which
of the following hormone is involved in counteracting apical dominance induced
by auxin
a)
cytokinin
b) ethylene
c) abscisic acid
d) brassinosteroids
Answers
1-a
|
2-b
|
3-c
|
4-b
|
5-d
|
6-a
|
7-b
|
8-c
|
9-c
|
10-a
|
11-b
|
12-a
|
13-a
|
14-c
|
15-a
|
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Cytokinins mcq MCQ on Cytokinins
MCQ on Phytohormones
multiple choice questions on plant hormone Cytokinins
phytohormones mcq
plant hormones mcq