MCQs on Gibberellin In Plants
1. This is not a function of gibberellins
(a) promote dormancy
(b) promote cell elongation
(c) promote parthenocarpic fruit formation
(d) promote elongation of internodes
Answer: (a)
2. Elongation or lengthening of rosette plants is obtained by treating it with
(a) cytokinin
(b) gibberellin
(c) zeatin
(d) auxin
Answer: (b)
3. Generally, translocation of gibberellins is non-polar occurring through
(a) capillary rise
(b) phloem
(c) xylem
(d) both xylem and phloem
Answer: (b)
4. The gibberellin involved in flowering is
(a) GA1
(b) GA3
(c) GA4
(d) GA9
Answer: (d)
5. The earliest phases of synthesis of gibberellin occur in
(a) plastids
(b) mitochondria
(c) peroxisome
(d) cytoplasm
Answer: (a)
6. Nullification of genetic dwarfism is possible by spraying with
(a) zeatin
(b) auxin
(c) gibberellin
(d) cytokinin
Answer: (c)
7. The hormone involved in the regulation of florigen synthesis is
(a) zeatin
(b) gibberellin
(c) ethylene
(d) cytokinin
Answer: (b)
8. Gibberellins found in the aleurone layer of barley increases the transcription of
(a) lipase and cellulase
(b) protease and amylase
(c) protease and cellulase
(d) lipase and protease
Answer: (b)
9. This bioassay is used to test the presence of gibberellins
(a) dwarf pea elongation technique
(b) chlorophyll preservation test
(c) excised radish cotyledon enlargement test
(d) rice seedling growth inhibition test
Answer: (a)
10. Gibberellins were named after a fungus known as
(a) Gibberella acuminata
(b) Gibberella africana
(c) Gibberella fujikuroi
(d) Gibberella gaditijirrii
Answer: (c)
