Growth and Development in Plants Set 1
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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Growth and Development in Plants Set 1
Q1 | Oat - coleoptile test (coleoptile-test) is conducted for which hormone ?
- Abscisic acid
- Gibberrelic acid (GA)
- Indole acetic acid (IAA)
- Indole naphthalne acetic acid (INAA)
Q2 | Gibberrelin participate in which of the following process?
- Removal of seed dormancy
- Developing seed less fruit
- Growth of internodes
- All of the above
Q3 | Tropic movement is due to
- Bidirectional effect of environmental factors on plant parts
- Unidirectional effect of environmental factors on plant parts
- Multidirectional effect of environmental factors on plant parts
- No effect of environmental factors on plant parts
Q4 | What is the period of cell formation to cell differntiation ?
- Sigmoid graph
- Normal growth period
- Maximum growth period
- Grand period of growth
Q5 | What is the required temperature for growth in most of the plants?
- 20-30 o C
- 35-40 o C
- 10-15 o C
- 15-20 o C
Q6 | Zeatin is an example of
- ABA
- Auxin
- Gibberrellin
- Cytokinin
Q7 | Spiral developement of tendrils? (BHU 1989, CBSE 1999, 1995), (MPPMT 1992, CPMT 1993) ( CETCHO 2000,AIIMS 2000) (JK CMEE 2004)
- Thigmotropism
- Thermotropism
- Hydrotropism
- Phototropism
Q8 | State the full form of IAA (NCRT 1974)
- Indole- 3 acetic anhydrase
- Indole-3 acetic acid
- Indole- 3 aceto acetate
- Indole-3 aceto-acetic
Q9 | Which of the following physiological process performed by gibberrelic acid?
- Dwarfism of tall plant genetically
- Elongation of short plant genetically
- Growth in size of stem and root formation
- Yellowing of young leaves
Q10 | Which of the following is used to enhance colour of fruits and more juice in fruits unnaturally?
- Sodium chloride
- IAA
- Ethylene gas
- kinetin
Q11 | Which hormone is responsible for apical dominance?
- Auxin
- Cytokinin
- Gibberrelin
- Ethylene
Q12 | With which reaction Phytochrome is associated ?(AIMS- 1989, 1990, CBSE 1988, BHU 1981, 1991)
- Phototropism
- Photorespiration
- Photo-period
- Geotropism
Q13 | In the absence of light, amount of which of the following is increased ?
- Absorption of mineral salt
- Absorption of water
- Elongation of internodes
- Ascent of sap
Q14 | When is abscission- layer formed? (AIIMS- 1980)
- With increased concentration of auxin
- With decreased concentration of auxin
- With increased concentration of gibberrelin
- With decreased concentraton of gibberelin
Q15 | Vernalization is (MPPMT- 1990, AMU- 1999, IKCMEE- 2000)
- Growth graph related to light
- Effect of photoperiod on the growth of plant, which results flowering
- Rapid growth in low temperature
- Daily photo period
Q16 | What is initiative substance of IAA? (PMT- 1990- APMEE 2002)
- Tryptophan
- Lucine
- Tyrosine
- Phehyl alamine
Q17 | What is apical dominance? (CPMT- 1989)
- Growth of apical bud is inhibited due to nearby lateral buds
- Growth of apical bud is promoted due to removal of nearest lateral buds
- Removal of apical bud hinders growth of lateral buds
- Development of lateral buds hinders due to presence of apical bud
Q18 | Which of the following is water stress hormone? (CBSE-1993, MPPMT-1995, BHU 1998, CETCHD, Kerala 2000, Orissa- 2003)
- Benzyl amino purine
- 2,4- dichlorophenoxy acetic acid
- Ethylene
- Abscisic acid
Q19 | If apical region of stem is removed from any plant, what is observed? (CMPT - 1993, CBSE -1994, 2000, KARNATAKA - 2000
- New apical bud formation
- Length of main stem increases
- Plant dies
- Lateral branches emerges
Q20 | Which of the hormone is synthetic ? (MPPMT 1996, AIIMS 1996, BHU 1997, CPMT 1999)
- GA3
- GA2
- IAA
- 2-4 D
Q21 | What is 2-4 D ?
- Weedicide
- Insecticide
- Rodenticide
- Wormicide
Q22 | What is agent Orange ? (CBSE 1998, AIMS 1999)
- Weedicide with dioxin
- Chemical used in luminiscent plant
- Insectide which is biodegradable
- Colour used in tube light
Q23 | One plant group kept for 12 hrs in day and 12 hrs in night and flowering is observed in it. Another plant group is kept similarly for day - night period and for very short time light is given during dark period it do not flower. What is such type of plant called ? (CBSE 2004)
- Long-day plant
- Day-neutral plants
- Medium-day plants
- Short-day plants
Q24 | How gibberrelin accelerates seed germination ? (AIIMS 2005)
- By effecting rate of cell division
- By the synthesis of digestive juice
- Abscisic acid
- Absorption of water from hard seed coat
Q25 | What is the colour of Phytochrome pigment ?
- Yellowish green
- Bluish
- Red
- Pink