NEET Biology Plant Growth and Development / पौधे की वृद्धि और विकास Question Bank

done Photoperiodism and Vernalization Total Questions - 89

• question_answer1)
  Which of the following factors influence the process of flowering [BHU 1989, 90]
  A)
  Acidity of soil done clear
  B)
  Water in the soil done clear
  C)
  Amount of green pigment done clear
  D)
  Photoperiod done clear
  View Solution play_arrow

• question_answer2)
  With which of the following process Cholodny-Went theory is concerned [MP PMT 1990]
  A)
  Phototropism done clear
  B)
  Photomorphogenesis done clear
  C)
  Photorespiration done clear
  D)
  Photoperiodism done clear
  View Solution play_arrow

• question_answer3)
  Pigment phytochrome is involved in [AIIMS 1989, 90; BHU 1980, 81; CBSE PMT 1988; RPMT 1992; Kerala CET 2001; 03]
  A)
  Phototropism done clear
  B)
  Photorespiration done clear
  C)
  Photoperiodism done clear
  D)
  Geotropism done clear
  View Solution play_arrow

• question_answer4)
  The red absorbing form of phytochrome gets converted to the far-red absorbing form after getting irradiated at [BHU 1994]
  A)
  660 nm done clear
  B)
  730 nm done clear
  C)
  530 nm done clear
  D)
  660 nm to 730 nm done clear
  View Solution play_arrow

• question_answer5)
  The pigment involved in red-far red light interconversion is [MP PMT 1990; AIIMS 1987; CPMT 1994; CBSE PMT 1995, 2002]
  A)
  Cytochrome done clear
  B)
  Xanthophyll done clear
  C)
  Lycopen done clear
  D)
  Phytochrome done clear
  View Solution play_arrow

• question_answer6)
  Photoperiodism is
  A)
  Growth curvature in response to light done clear
  B)
  Reccurrence of day and night done clear
  C)
  Effect of day length and plant growth done clear
  D)
  Flowering plant done clear
  View Solution play_arrow

• question_answer7)
  Photoperiodism is associated with the formation of
  A)
  Chlorophyll done clear
  B)
  Florigen done clear
  C)
  Auxin done clear
  D)
  Gibberellin done clear
  View Solution play_arrow

• question_answer8)
  Phytochrome is found in [BHU 1985, 87]
  A)
  Algae done clear
  B)
  Fungi done clear
  C)
  Vascular cryptogams  done clear
  D)
   Flowering plants done clear
  View Solution play_arrow

• question_answer9)
  Effect of length of day (light duration) on flowering is called    [BHU 1979; CPMT 1984; CPMT 1991; JIPMER 2001]
  A)
  Phototropism done clear
  B)
  Photoperiodism done clear
  C)
  Photorespiration done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer10)
  In many plants the change over from vegetative to reproductive phase takes place in response to [NCERT 1978]
  A)
  The length of the day done clear
  B)
  The severity of temperature done clear
  C)
  Mainly the food material available in soil done clear
  D)
  Oxygen present in the air done clear
  View Solution play_arrow

• question_answer11)
  When the dark period of short day plants is interrupted by a brief exposure of light, then the plant [AIIMS 1982; CBSE PMT 1994]
  A)
  Will not flower at all done clear
  B)
  Flower immediately done clear
  C)
  Give more flowers done clear
  D)
  Turn into a long day plant done clear
  View Solution play_arrow

• question_answer12)
  Which of the following hormones can replace vernalization [CBSE PMT 1989; CPMT 1989; BHU 1994]
  A)
  Auxin done clear
  B)
  Ethylene done clear
  C)
  Gibberellins done clear
  D)
  Cytokinins done clear
  View Solution play_arrow

• question_answer13)
  Which of the following is required for formation of flowers in the plants
  A)
  Adequate oxygen done clear
  B)
  Definite photoperiod done clear
  C)
  Adequate manure done clear
  D)
  Adequate water and minerals done clear
  View Solution play_arrow

• question_answer14)
  Maximum growth  takes place in
  A)
  Green light done clear
  B)
  Red light done clear
  C)
  Blue light done clear
  D)
  Ultraviolet light done clear
  View Solution play_arrow

• question_answer15)
  Phytochromes are active in [MP PMT 1988]
  A)
  Blue light done clear
  B)
  Green light done clear
  C)
  Red light done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer16)
  Photoperiodic stimulus is received by [MP PMT 1999]
  A)
  Leaves done clear
  B)
  Buds done clear
  C)
  Meristem done clear
  D)
  Flowers done clear
  View Solution play_arrow

• question_answer17)
  For short day plants, the critical period is
  A)
  Light done clear
  B)
  Dark done clear
  C)
  Ultraviolet rays done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer18)
  Which of the following process is called springization or springification
  A)
  Fertilization done clear
  B)
  Pollination done clear
  C)
  Vernalization done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer19)
  If the growing coleoptile tip is cut
  A)
  Phototropism stops done clear
  B)
  Phototropism increase more done clear
  C)
  Rate of photoperiodism remains unchanged done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer20)
  Short night plants are
  A)
  Long day plants done clear
  B)
  Short day plants done clear
  C)
  Day neutral plants done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer21)
  Which of the following is day neutral plant
  A)
  Tomato done clear
  B)
  Cotton done clear
  C)
  Sunflower done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer22)
  Garner and Allard have worked on
  A)
  Biloxy variety of soyabean done clear
  B)
  Maryland mammoth variety of tobacco done clear
  C)
  Both [a] and [b] done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer23)
  If dark period is interrupted by red light in SDP, the plant will show
  A)
  Early flowering done clear
  B)
  Delay flowering done clear
  C)
  Both possibilities done clear
  D)
  No flowering done clear
  View Solution play_arrow

• question_answer24)
  Prolongation of continuous darkness will initiate
  A)
  Early flowering in short day plants done clear
  B)
  Delay flowering in short day plants done clear
  C)
  Flowering will not be effected done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer25)
  A plant which needs not less than 10 hours of light to flower is [DPMT 1982]
  A)
  Long day plant done clear
  B)
  Short day plant done clear
  C)
  Day neutral plant done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer26)
  Name 'phytochrome' was given by [MP PMT 2001]
  A)
  Mothes done clear
  B)
  Borthwick and Hendrick done clear
  C)
  Sorokin et al done clear
  D)
  Wickson and Thimman done clear
  View Solution play_arrow

• question_answer27)
  Reversal of etiolation effect by light is called
  A)
  Richmond Lang effect done clear
  B)
  Red-far red light interaction done clear
  C)
  Photomorphogenesis done clear
  D)
  Anisotropic wall expansion done clear
  View Solution play_arrow

• question_answer28)
  In respect of photomorphogenesis plants are most sensitive to
  A)
  Blue light done clear
  B)
  Red light done clear
  C)
  Far-red light done clear
  D)
  Ultraviolet light done clear
  View Solution play_arrow

• question_answer29)
  Phytochrome is closely related to [RPMT 1999]
  A)
  Chlorophyll ?e? done clear
  B)
  Bacterio chlorophyll done clear
  C)
  Phycocyanin ?c? done clear
  D)
  Carotinoid done clear
  View Solution play_arrow

• question_answer30)
  Phytochrome mediated process is
  A)
  Plastid orientation done clear
  B)
  Flower induction done clear
  C)
  Bud dormancy done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer31)
  Which one of the following is an excellent example of physiological preconditioning
  A)
  Photosynthesis done clear
  B)
  Respiration done clear
  C)
  Photoperiodism done clear
  D)
  Vernalization done clear
  View Solution play_arrow

• question_answer32)
  The term 'photoperiodism' was proposed by or The phenomenon of photoperiodism in plants was discovered by [BHU 1982, 85; MP PMT 1987, 94, 2002; CPMT 1987]
  A)
  Lysenko and Thimman done clear
  B)
  Blackman and Skoog done clear
  C)
  Garner and Allard done clear
  D)
  Chailakhyan and Borthwick done clear
  View Solution play_arrow

• question_answer33)
  A hypothetical chemical involved in the flowering of plants is or Chemical agent which has important role in flowering is [DPMT 1986; CBSE PMT 1991]
  A)
  Gibberellin done clear
  B)
  Kinetin done clear
  C)
  Indole acetic acid done clear
  D)
  Florigen done clear
  View Solution play_arrow

• question_answer34)
  Phytochrome is used in [BHU 1986]
  A)
  Flowering only done clear
  B)
  Seed germination only done clear
  C)
  Transpiration only done clear
  D)
  All physiological processes exhibited by the plants such as seed germination, flowering (photoperiodism), stem elongation and transpiration done clear
  View Solution play_arrow

• question_answer35)
  In short day plants (SDP) flowering is induced by [CBSE PMT 1992]
  A)
  Long night done clear
  B)
  Photoperiod less than 12 hours done clear
  C)
  Photoperiod shorter than initial value and uninterrupted long night done clear
  D)
  Short photoperiod and interrupted long night done clear
  View Solution play_arrow

• question_answer36)
  Pigment involved in photo-perception in flowering is [BHU 1991]
  A)
  Cytochrome done clear
  B)
  Carotene done clear
  C)
  Lycopene done clear
  D)
  Phytochrome done clear
  View Solution play_arrow

• question_answer37)
  If the seedlings are grown in darkness [NCERT 1980]
  A)
  They are of the same size as those grown in light done clear
  B)
  They are much healthier than those grown in light done clear
  C)
  They are similar to those grown in light done clear
  D)
  They are taller than those grown in light done clear
  View Solution play_arrow

• question_answer38)
  The practice of subjecting seeds to low temperatures for a period of time in order to cause growth and flowering during summer season is called [CPMT 1983; BHU 1985; MP PMT 1990; CBSE PMT 1992]
  A)
  Wintering done clear
  B)
  Vernalization done clear
  C)
  Devernalization done clear
  D)
  Thermolysis done clear
  View Solution play_arrow

• question_answer39)
  Phytochrome is [MP PMT 1993]
  A)
  Absorption of blue light by leaves done clear
  B)
  Absorption of PR and PFR in reversible manner done clear
  C)
  Absorption of red light with wavelength 660mm done clear
  D)
  Absorption of far-red light with wavelength 740mm done clear
  View Solution play_arrow

• question_answer40)
  In blue-violet colour light
  A)
  Internodal growth is pronounced done clear
  B)
  Increase size of lamina of leaf done clear
  C)
  Both [a] and [b] done clear
  D)
  Reduces the expansion of leaves done clear
  View Solution play_arrow

• question_answer41)
  In Nigella
  A)
  Seeds germinate in the intermittent light done clear
  B)
  Seeds germinate if exposed to light done clear
  C)
  Light may inhibit the process of seed germination done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer42)
  Florigen is synthesized in [RPMT 1995]
  A)
  Stem done clear
  B)
  Leaves done clear
  C)
  Root done clear
  D)
  Fruits done clear
  View Solution play_arrow

• question_answer43)
  Which of the following factors affect growth to a great extent
  A)
  Duration of light done clear
  B)
  Direction of light done clear
  C)
  Intensity of light done clear
  D)
  Wavelength of light done clear
  View Solution play_arrow

• question_answer44)
  Generally the internode of a plant elongates most in
  A)
  Ultraviolet light done clear
  B)
  Infra-red light done clear
  C)
  Blue wavelength of light done clear
  D)
  Complete spectrum of visible light done clear
  View Solution play_arrow

• question_answer45)
  Two seeds are germinated, A in light and B in dark. Which of the two grows much taller in initial stage
  A)
  A > B done clear
  B)
  B  A done clear
  C)
  A  = B done clear
  D)
  No growth occurs in any of them done clear
  View Solution play_arrow

• question_answer46)
  A dark grown pale and undifferentiated seedling is called
  A)
  Morbid done clear
  B)
  Etiolated done clear
  C)
  Pallolated done clear
  D)
  Chlorotic/Variegated done clear
  View Solution play_arrow

• question_answer47)
  A green plant turns pale when transferred to prolonged darkness. It represents a phenomenon called [AFMC 1986]
  A)
  Etiolation done clear
  B)
  Chlorosis done clear
  C)
  Cytorrhisis done clear
  D)
  Paleolation done clear
  View Solution play_arrow

• question_answer48)
  A pigment responsible for light sensitivity in plants is
  A)
  Chlorophyll done clear
  B)
  Carotene and xanthophyll done clear
  C)
  Cytochrome done clear
  D)
  Phytochrome done clear
  View Solution play_arrow

• question_answer49)
  Which treatment is effective in red-far red response of plants
  A)
  First treatment done clear
  B)
  Last treatment done clear
  C)
  Middle treatment done clear
  D)
  Sum total of treatment done clear
  View Solution play_arrow

• question_answer50)
  The red-far red response is mediated by
  A)
  IAA done clear
  B)
  GA done clear
  C)
  CK done clear
  D)
  ABA done clear
  View Solution play_arrow

• question_answer51)
  Physiologically active form of phytochrome is
  A)
  P 660 done clear
  B)
  P 730 done clear
  C)
  P 860 done clear
  D)
  Mixture of all done clear
  View Solution play_arrow

• question_answer52)
  Photoperiod is an important factor which affects
  A)
  Flowering in many plants done clear
  B)
  Moulting and migration in many temperate birds done clear
  C)
  Breeding behaviour of some insects done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer53)
  A change from vegetative to reproductive phase in plant occurs in response to
  A)
  Food available in plants done clear
  B)
  Change in temperature done clear
  C)
  Change in duration of light done clear
  D)
  Change in concentration of done clear
  View Solution play_arrow

• question_answer54)
  Which of the following exerts profound effect on the reproductive growth of a flowering plant [Wardha 1985; EAMCET 1985]
  A)
  Quality (colour) of light done clear
  B)
  Quantity (intensity) of light done clear
  C)
  Direction of light done clear
  D)
  Duration of light cycle done clear
  View Solution play_arrow

• question_answer55)
  The flowering response of plant can be changed by
  A)
  Inducing mutations done clear
  B)
  Photoperiodic treatment done clear
  C)
  Injecting enzymes done clear
  D)
  Somatic hybridization done clear
  View Solution play_arrow

• question_answer56)
  What is the action spectrum of photoperiodism [BHU 1982]
  A)
  430 and 660 nm done clear
  B)
  640 and 660 nm done clear
  C)
  660 and 730 nm done clear
  D)
  700 and 900 nm done clear
  View Solution play_arrow

• question_answer57)
  What is the effect on the flowering of a plant if a flash of red light is followed by a flash of far-red light [AIIMS 1985]
  A)
  Flowering is increased done clear
  B)
  Flowering is decreased done clear
  C)
  Flowering is stopped done clear
  D)
  Effect of red flash is reversed done clear
  View Solution play_arrow

• question_answer58)
  If a tree flowers thrice in a year (October, January and July) in Northern India, it is said to be [CBSE PMT 1997]
  A)
  Photosensitive but thermo-insensitive done clear
  B)
  Thermosensitive but photo-insensitive done clear
  C)
  Photo and thermo-insensitive done clear
  D)
   Photo and thermosenitive done clear
  View Solution play_arrow

• question_answer59)
  Which of the following process is never affected by light in a vegetable garden [AFMC 1982, 85]
  A)
  Seed germination done clear
  B)
  Flowering done clear
  C)
  Osmosis and fertilization done clear
  D)
  Food manufacture done clear
  View Solution play_arrow

• question_answer60)
  Chrysanthemum flowers either in winter season or in evening because it is a
  A)
  Short-day plant done clear
  B)
  Long-day plant done clear
  C)
  Day-neutral plant done clear
  D)
  Mid-day plant done clear
  View Solution play_arrow

• question_answer61)
  Which of the following pigment is present in two forms [CPMT 1995]
  A)
  Cytochrome done clear
  B)
  Florigen done clear
  C)
  Phytochrome done clear
  D)
  Vernalin done clear
  View Solution play_arrow

• question_answer62)
  For germination of seed, which light is necessary [AFMC 1996]
  A)
  Red light done clear
  B)
  Green light done clear
  C)
  Far-red light done clear
  D)
  Blue light done clear
  View Solution play_arrow

• question_answer63)
  What will happen if several bulbs are lighted in soyabean fields in the night
  A)
  Production will be more done clear
  B)
  Production will be normal done clear
  C)
  Production will be less done clear
  D)
  No effect done clear
  View Solution play_arrow

• question_answer64)
  Phytochrome plays important role in
  A)
  Photosynthesis done clear
  B)
  Respiration done clear
  C)
  Photorespiration done clear
  D)
  Photomorphogenesis done clear
  View Solution play_arrow

• question_answer65)
  Most of the plants are seasonal due to [MP PMT 1997]
  A)
  Photoperiodism done clear
  B)
  Phototropism done clear
  C)
  Photosynthesis done clear
  D)
  Photolysis done clear
  View Solution play_arrow

• question_answer66)
  The phytochrome was discovered by [MP PMT 1998, 2002]
  A)
  Garner and Allard done clear
  B)
  W. Went done clear
  C)
  F.F. Blackman done clear
  D)
  F.E. Fritsch done clear
  View Solution play_arrow

• question_answer67)
  The effect of daily light period on flowering is called [CPMT 1999]
  A)
  Photoperiodism done clear
  B)
  Photo-oxidation done clear
  C)
  Phototropism done clear
  D)
  Photorespiration done clear
  View Solution play_arrow

• question_answer68)
  The response of different organisms to the environmental rhythms of light and darkness is called [CBSE PMT 1998]
  A)
  Phototaxis done clear
  B)
  Phototropism done clear
  C)
  Vernalization done clear
  D)
  Photoperiodism done clear
  View Solution play_arrow

• question_answer69)
  Phytochrome becomes active in [CBSE PMT 1998]
  A)
  Green light done clear
  B)
  Blue light done clear
  C)
  Red light done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer70)
  The pigment involved in photomorphogenetic movements is [BHU 2000]
  A)
  Phytochrome done clear
  B)
  Cytochrome done clear
  C)
  Chlorophyll done clear
  D)
  Xanthophyll done clear
  View Solution play_arrow

• question_answer71)
  Phytochrome is sensitive to [BHU 2001; Pb. PMT 2004]
  A)
  Red light done clear
  B)
  Far red light done clear
  C)
  Green light done clear
  D)
  Both [a] and [b] done clear
  View Solution play_arrow

• question_answer72)
  Proteinaceous pigment which is the centre of activities concerned with light is [CBSE PMT 2001]
  A)
  Phytochrome done clear
  B)
  Chlorophyll done clear
  C)
  Anthocyanin done clear
  D)
  Carotenoids done clear
  View Solution play_arrow

• question_answer73)
  Which of the following is a long day plant [CBSE PMT 2001]
  A)
  Mirabilis done clear
  B)
  Glycine max done clear
  C)
  Mirabilis jalapa done clear
  D)
  Spinacia oleracea done clear
  View Solution play_arrow

• question_answer74)
  Photoperiodism affects [MP PMT 2001]
  A)
  Vegetative growth done clear
  B)
  Internode elongation done clear
  C)
  Seed germination done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer75)
  A pigment concerned with both floral induction and seed germination is [MP PMT 2002]
  A)
  Florigen done clear
  B)
  Chlorophyll done clear
  C)
  Plastocyanin done clear
  D)
  Phytochrome done clear
  View Solution play_arrow

• question_answer76)
  Vernalisation is done at [BHU 1999; CPMT 2000; DPMT 2003, 04; BVP 2004]
  A)
  Lower temperature done clear
  B)
  Low light intensity done clear
  C)
  Higher temperature done clear
  D)
  High light intensity done clear
  View Solution play_arrow

• question_answer77)
  In SDP flowering does not occur [BHU 2003]
  A)
  When intermediate light is given redfar red red done clear
  B)
  Interrupted by a flash of far light done clear
  C)
  Interrupted by a flash redfar light done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer78)
  The maximum growth rate occurs in [CBSE PMT 2004]
  A)
  Lag phase done clear
  B)
  Exponential phase done clear
  C)
  Stationary phase done clear
  D)
  Senescent phase done clear
  View Solution play_arrow

• question_answer79)
  One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant [CBSE PMT 2004]
  A)
  Day neutral done clear
  B)
  Short day done clear
  C)
  Long day done clear
  D)
  Darkness neutral done clear
  View Solution play_arrow

• question_answer80)
  When flowering is regulated by length of day and night, it is called [Orissa JEE 2004]
  A)
  Photoperiodism done clear
  B)
  Phototropism done clear
  C)
  Nyctinasty done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer81)
  Phytochrome occurs in two forms. In which form it promotes the germination of seeds of some species [CPMT 2004]
  A)
   forms done clear
  B)
   forms done clear
  C)
  Both forms done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer82)
  If plants are given only visible light it's growth will   [MP PMT 2005]
  A)
  Increase done clear
  B)
  Decrease done clear
  C)
  Unusual form done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer83)
  Photoperiodism is substituted by [MP PMT 2005]
  A)
  Temperature done clear
  B)
  Mineral nutrient done clear
  C)
  Vit done clear
  D)
  Iron done clear
  View Solution play_arrow

• question_answer84)
  Short day plant initiate flowering if [AMU 2005]
  A)
  Light period is interrupted due to the darkness done clear
  B)
  Dark period is interrupted due to light done clear
  C)
  In both a and b conditions done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer85)
  Short day plant is [Orissa JEE 2005]
  A)
  Xanthium done clear
  B)
  Pisum done clear
  C)
  Cucumis done clear
  D)
  Avena done clear
  View Solution play_arrow

• question_answer86)
  The period of suspended growth due to exogenous condition is termed as [J&K CET 2005]
  A)
  Quiescence done clear
  B)
  Dormancy done clear
  C)
  Perennation done clear
  D)
  Hibernation done clear
  View Solution play_arrow

• question_answer87)
  The movement of organs in response to light is called   [J&K CET 2005]
  A)
  Hydrotropism done clear
  B)
  Thigmotropism done clear
  C)
  Phototropism done clear
  D)
  Geotropism done clear
  View Solution play_arrow

• question_answer88)
  Which of the following is a short day plant [HP PMT 2005]
  A)
  Wheat done clear
  B)
  Barley done clear
  C)
  Larkspur done clear
  D)
  Dahlia done clear
  View Solution play_arrow

• question_answer89)
  The low temperature treatment that reduces the period between sowing and flowering is called [AMU 2005; HP PMT 2005]
  A)
  Chemostaxis done clear
  B)
  Vernilization done clear
  C)
  Freezing injury done clear
  D)
  None of the above done clear
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