1. Gibberellins
was named after a fungus called
Answers:
a)
Gibberella fujikuroi
b) Gibberella gaditijirrii
c) Gibberella acuminata
d) Gibberella africana
2. Gibberellins
are chemically
a)
phenolic derivatives
b) terpenoid derivatives
c) adenine derivatives
d)
alkaloid derivatives
3. Gibberella fujikuroi the fungus causes
a)
foolish seedling disease of rice or bakanae disease
b) damping off seedling disease of rice or bakanae
disease
c) fungal blight disease of rice or bakanae disease
d)
rust disease of rice or bakanae disease
4.
The most studied gibberellin is
a)
GA1
b) GA9
c) GA3
d)
GA4
5. All
are anti giberrellins except
a)
acetosyringone
b) Amo1618
c) maleic hydrazide
d)
phosphon D
6. All
are functions of gibberellins except
a)
promote cell elongation
b) promote dormancy
c) promote elongation of internodes
d)
promotes parthenocarpic fruit formation
7. Which
of the following bioassay is used to test the presence of giberrillins
a)
chlorophyll preservation test
b) dwarf pea elongation technique
c) rice seedling growth inhibition test
d)
excised radish cotyledon enlargement test
8. The
gibberilins present in the aleurone layer of barley increase transcription of
a)
lipase and protease
b) protease and cellulase
c) protease and amylase
d)
lipase and cellulase
9. Elongation
of rosette plants is achieved by treatment with
 |
| Elongation of rosette plants |
a)
auxin
b) zeatin
c) cytokinin
d)
gibberrellin
10. Translocation
of gibberrelins is non-polar and predominantly takes place through
a)
xylem
b) phloem
c) both phloem and xylem
d)
capillary rise
11. The
hormone which is involved in regulation of florigen synthesis
a)
ethylene
b) zeatin
c) cytokinin
d) gibberrellin
12.
Which is the giberrellin involved in elongation responses
a)
GA1
b) GA9
c) GA3
d)
GA4
13.
Which is the giberrellin involved in
flowering
a)
GA1
b) GA9
c) GA3
d) GA4
14. Early
stages of gibberellin synthesis take place in
a)
mitochondria
b) peroxisome
c) plastids
d)
cytoplasm
15. Genetic
dwarfism can be nullified by spraying with
a)
auxin
b) zeatin
c) cytokinin
d) gibberellin
Answers:
1-a
|
2-b
|
3-a
|
4-c
|
5-a
|
6-b
|
7-b
|
8-c
|
9-d
|
10-b
|
11-d
|
12-a
|
13-b
|
14-c
|
15-d
|
Tags:
Gibberellins mcq
MCQ on Gibberellins
MCQ on Phytohormones
mcq on plant hormones
mcq on Plant Hormones Gibberellins
plant hormones mcq