1. Cytokinin stimulates cell [IE 2009][IE 2009]
- Division
- Elongation
- Wall thickening
- Turgidity
2. Gibberellic acid/ Gibberellin was detected from: [MOE 2063][MOE 2063]
- Fungus
- Bacteria
- Virus
- Insect
3. Which one of the following plant growth hormone was extracted from a fungus by a team of Japanese scientist?
- Auxins
- Gibberellins
- Cytokinin
- ABA
4. Rooting hormone is: [MOE 2003][MOE 2003]
5. Auxins are: [MOE 2057][MOE 2057]
- Enzymes
- Hormones
- Tannins
- Vitamins
6. Level auxanometer is used to measure [MOE 2055][MOE 2055]
- Growth
- Respiration
- Photosynthesis
- Transpiration
7. Plant apex produces growth-promoting factor called [MOE 2054, 2055][MOE 2054, 2055]
- Hormone
- Enzyme
- Protein
- Carbohydrate
8. Which hormone is primarily responsible for cell division in plants? [IOM 2006, 2055][IOM 2006, 2055]
- Abscisic acid (ABA)
- Indole-acetic acid
- Gibberellin
- Cytokinin
9. Genetically dwarf plant can be made long by the application of: [IOM 1999][IOM 1999]
- Auxin
- Cytokinin
- Gibberellin
- Vernalin
10. Lawn grass are cut at the top because: [IOM 1999][IOM 1999]
- Cells degenerate and rapid regeneration occurs
- It is done for aesthetic purpose
- Lateral growth occurs
- It provides more sunlight
11. Food mobilization in germinating seed is due to: [BPKIHS 2000][BPKIHS 2000]
- Auxin
- Gibberellin
- Cytokinin
- Ethylene
12. Seed dormancy is due to: [BPKIHS 2006][BPKIHS 2006]
- Ethylene
- Starch
- Abscisic acid
- Phytochromes
13. Organ formation in callus tissue is controlled by [BPKIHS 1996][BPKIHS 1996]
- Auxin only
- Cytokinin only
- Both auxin and cytokinin
- Ethylene and auxin
14. Hormone for flowering is [BPKIHS 1996][BPKIHS 1996]
- Vernalin
- Florigen
- Cytokinin
- Ethylene
15. Auxin is a [BPKIHS 1997][BPKIHS 1997]
- Plant growth regulation
- A chemical which can affect plant growth
- Growth hormone
- Plant growth modulator
16. The elongation of plant is caused by: [IE 2001][IE 2001]
17. A plant detects the direction of light by means of: [IE 2007][IE 2007]
- Pigment
- Stomatal opening
- Amyloplast
- Heat receptor
18. Flowering in short day plant is induced in
- Auxin
- Gibberellin
- Cytokinin
- Ethylene
19. Which of the following is an example of cytokinin? [BPKIHS 2015][BPKIHS 2015]
- Maleic hydrazine
- Indole butyrate
- Kinetin (6-furfuryl aminopurine)
- Anthrosine acetic acid
20. Hormone for flowering [BPKIHS 2013][BPKIHS 2013]
- Florigen
- Auxin
- Cytokinin
- Ethylene
21. Sprouting of potato during storage can be prevented by [BPKIHS 2012][BPKIHS 2012]
- Auxin
- Gibberellin
- Methyl ester
- Kinetic
22. Light has no direct role in [BPKIHS 2012][BPKIHS 2012]
- Germination
- Flowering
- Fertilization
- Both b and c
23. Which induces male flowers in place of female flowers? [IOM][IOM]
- Auxin
- Cytokinin
- Ethylene
- Gibberellin
24. Stomata closure in plant is induced by [MOE 2014][MOE 2014]
- Abscisic acid
- Gibberellic acid
- Cytokinin
- Auxin
25. Bioassay for auxin is done with [MOE 2010][MOE 2010]
- Avena curvature test
- Seed dormancy test
- Green leaf test
- Dwarf maize test
