Solved papers for NEET Biology NEET PYQ-Growth and Development Plants

done NEET PYQ-Growth and Development Plants Total Questions - 42

• question_answer1) A plant hormone used for inducing morphogenesis in plant tissue culture is: [AIPMT 1998]
  A)
  abscisic acid
  done clear
  B)
  gibberellins
  done clear
  C)
  cytokinins
  done clear
  D)
  ethylene
  done clear
  View Answer play_arrow

• question_answer2) The response of different organisms to the environmental rhythms of light and darkness is called: [AIPMT 1998]
  A)
  phototaxis
  done clear
  B)
  phototropism
  done clear
  C)
  vernalization
  done clear
  D)
  photoperiodism
  done clear
  View Answer play_arrow

• question_answer3) ABA is involved in: [AIPMT 1999]
  A)
  dormancy of seeds
  done clear
  B)
   increased cell division
  done clear
  C)
   root elongation
  done clear
  D)
   shoot elongation
  done clear
  View Answer play_arrow

• question_answer4) The closing and opening of the leaves of Mimosa pudica is due to: [AIPMT 1999]
  A)
  chemonastic movement
  done clear
  B)
  thermonastic movement
  done clear
  C)
  seismonastic movement
  done clear
  D)
  hydrotropic movement
  done clear
  View Answer play_arrow

• question_answer5) The function of oxytocin is to help in: [AIPMT 1999]
  A)
  growth
  done clear
  B)
  lactation
  done clear
  C)
  childbirth
  done clear
  D)
  gametogenesis
  done clear
  View Answer play_arrow

• question_answer6) Removal of apical (terminal) bud of a flowering plant (or pruning of a flowering plant) leads to: [AIPMT 2000]
  A)
  formation of new apical buds       
  done clear
  B)
  formation of adventitious roots on the cut side
  done clear
  C)
  early flowering  (or stopping of floral growth)
  done clear
  D)
  promotion of lateral branches
  done clear
  View Answer play_arrow

• question_answer7) Coconut milk (coconut water) is widely used in tissue culture because it contains: [AIPMT 2000]
  A)
  auxins
  done clear
  B)
  ethylene
  done clear
  C)
  cytokinin
  done clear
  D)
  gibbereliins        
  done clear
  View Answer play_arrow

• question_answer8) Which method out of the following renders the seed coat permeable to water so that embryo expansion is not physically retarded? [AIPMT 2000]
  A)
  Stratification
  done clear
  B)
  Denudation
  done clear
  C)
    Vernalisation
  done clear
  D)
  Scarification
  done clear
  View Answer play_arrow

• question_answer9) Which breaks dormancy of potato tuber? [AIPMT 2001]
  A)
  Gibberellin
  done clear
  B)
  IAA
  done clear
  C)
  ABA
  done clear
  D)
  Zeatin
  done clear
  View Answer play_arrow

• question_answer10) Hormone responsible for senescence is: [AIPMT 2001]
  A)
  ABA
  done clear
  B)
  auxin
  done clear
  C)
  GA
  done clear
  D)
  cytokinin
  done clear
  View Answer play_arrow

• question_answer11) Which of the following prevents the fall of fruits? [AIPMT 2001]
  A)
  GA3
  done clear
  B)
  NAA    
  done clear
  C)
  Ethylene
  done clear
  D)
  Zeatin
  done clear
  View Answer play_arrow

• question_answer12) Which plant is LDP? [AIPMT 2001]
  A)
  Tobacco
  done clear
  B)
  Glycine max
  done clear
  C)
    Mirabilis jalapa
  done clear
  D)
  Spinach
  done clear
  View Answer play_arrow

• question_answer13) Seed dormancy is due to the: [AIPMT 2002]
  A)
  ethylene
  done clear
  B)
  abscisic acid
  done clear
  C)
  IAA
  done clear
  D)
  starch
  done clear
  View Answer play_arrow

• question_answer14) Coconut milk factor is: [AIPMT 2003]
  A)
  abscisic acid
  done clear
  B)
  cytokinin
  done clear
  C)
    an auxin
  done clear
  D)
  a gibberellins
  done clear
  View Answer play_arrow

• question_answer15) Nicotiana sylvestris flowers only during long days and N. tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be crossfertilized to produce s elf-fertile offspring. What is die best reason for considering N. sylvestris and N. tabacum to be separate species?  [AIPMT 2003]
  A)
  They are physiologically distinct
  done clear
  B)
  They are morphologically distinct
  done clear
  C)
  They cannot interbreed in nature
  done clear
  D)
  They are reproductively distinct
  done clear
  View Answer play_arrow

• question_answer16) 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 arid it did not produce flower. Under which one of the following categories will you place this plant? [AIPMT (S) 2004]
  A)
  Long day
  done clear
  B)
  Darkness neutral
  done clear
  C)
  Day neutral
  done clear
  D)
  Short day
  done clear
  View Answer play_arrow

• question_answer17) The maximum growth rate occurs in: [AIPMT (S) 2004]
  A)
  stationary phase
  done clear
  B)
  senescent phase
  done clear
  C)
  lag phase
  done clear
  D)
  exponential phase
  done clear
  View Answer play_arrow

• question_answer18) Treatment of seed at low temperature under moist conditions to break its dormancy is called:    [AIPMT (S) 2006]
  A)
  scarification
  done clear
  B)
  vernalization
  done clear
  C)
  chelation
  done clear
  D)
  stratification
  done clear
  View Answer play_arrow

• question_answer19) Moss peat is used as a packing material for sending flowers and live plants to distant places because: [AIPMT (S) 2006]
  A)
  it is easily available
  done clear
  B)
  it is hygroscopic
  done clear
  C)
  it reduces transpiration
  done clear
  D)
  it serves as a disinfectant
  done clear
  View Answer play_arrow

• question_answer20) "Foolish seedling" disease of rice led to die discover of: [AIPMT (S) 2007]
  A)
  GA
  done clear
  B)
  ABA    
  done clear
  C)
  2, 4-D
  done clear
  D)
  1AA
  done clear
  View Answer play_arrow

• question_answer21) Which one of the following pairs, is not correctly matched? [AIPMT (S) 2007]
  A)
  Abscisic acid                  — Stomatal closure
  done clear
  B)
  Gibberellic acid               — Leaf fall
  done clear
  C)
  Cytokinin                       — Cell division  
  done clear
  D)
  IAA                               — Cell wall elongation
  done clear
  View Answer play_arrow

• question_answer22) Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in [AIPMT (S) 2008]
  A)
  vessels and tracheid differentiation
  done clear
  B)
  leaf abscission
  done clear
  C)
  annual plants
  done clear
  D)
  floral parts
  done clear
  View Answer play_arrow

• question_answer23) One of the synthetic auxin is   [AIPMT (S) 2009]
  A)
  NAA
  done clear
  B)
  IAA
  done clear
  C)
  GA
  done clear
  D)
  IBA
  done clear
  View Answer play_arrow

• question_answer24) One of the commonly used plant growth hormone in tea plantations is [AIPMT (M) 2010]
  A)
  ethylene
  done clear
  B)
  abscissic acid
  done clear
  C)
  zeatin
  done clear
  D)
  indole-3-acetic acid
  done clear
  View Answer play_arrow

• question_answer25) Root development is promoted by [AIPMT (M) 2010]
  A)
  abscisic acid
  done clear
  B)
  auxin
  done clear
  C)
  gibberellin
  done clear
  D)
  ethylene
  done clear
  View Answer play_arrow

• question_answer26) The nerve centres which control the body temperature and the urge for eating are contained in [AIPMT (S) 2010]
  A)
  hypothalamus
  done clear
  B)
  pons
  done clear
  C)
  cerebellum
  done clear
  D)
  thalamus
  done clear
  View Answer play_arrow

• question_answer27) Photottopic curvature is the result of uneven distribution of [AIPMT (S) 2010]
  A)
  gibberellin
  done clear
  B)
  phytochrome
  done clear
  C)
  cytokinins
  done clear
  D)
  auxin
  done clear
  View Answer play_arrow

• question_answer28) Coiling of garden pea tendrils around any support is an example of [AIPMT (S) 2010]
  A)
  thigmotaxis
  done clear
  B)
  thigmonasty
  done clear
  C)
  thigmotropism
  done clear
  D)
  thermotaxis
  done clear
  View Answer play_arrow

• question_answer29) Mutations can be induced with [AIPMT (S) 2011]
  A)
  IAA
  done clear
  B)
  ethylene
  done clear
  C)
  gamma radiations
  done clear
  D)
  infrared radiations
  done clear
  View Answer play_arrow

• question_answer30) Through their effect on plant growth regulators, what do the temperature and light control in the plants? [AIPMT (M) 2012]
  A)
  Apical dominance
  done clear
  B)
  Flowering
  done clear
  C)
  Closure of stomata
  done clear
  D)
  Fruit elongation
  done clear
  View Answer play_arrow

• question_answer31) Which one of the following generally acts as an antagonist to gibberellins?    [AIPMT (M) 2012]
  A)
  Zeatin
  done clear
  B)
  Ethylene
  done clear
  C)
  ABA
  done clear
  D)
  IAA
  done clear
  View Answer play_arrow

• question_answer32) Vernalization stimulates flowering in [AIPMT (M) 2012]
  A)
  zamikand
  done clear
  B)
  turmeric
  done clear
  C)
  carrot
  done clear
  D)
  ginger
  done clear
  View Answer play_arrow

• question_answer33) During seed germination its stored food is mobilized by [NEET 2013]
  A)
  ethylene
  done clear
  B)
  cytokinin
  done clear
  C)
  ABA
  done clear
  D)
  gibberellin
  done clear
  View Answer play_arrow

• question_answer34) Dr. F Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment? [NEET 2014]
  A)
  It made possible the isolation and exact identification of auxin
  done clear
  B)
  It is the basis for quantitative determination of small amounts of growth-promoting substances
  done clear
  C)
  It supports the hypothesis that IAA is auxin
  done clear
  D)
  It demonstrated polar movement of auxins
  done clear
  View Answer play_arrow

• question_answer35) 

  A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos.

  Which of the following terms will you use to describe them? [NEET 2014]

  A)
  Mutated
  done clear
  B)
  Embolised
  done clear
  C)
  Etiolated
  done clear
  D)
  Defoliated
  done clear
  View Answer play_arrow

• question_answer36) Which one of the following growth regulators is known as 'stress hormone'? [NEET 2014]
  A)
  abscsic acid
  done clear
  B)
  Ethylene
  done clear
  C)
  \[\text{G}{{\text{A}}_{\text{3}}}\]
  done clear
  D)
  Indole acetic acid
  done clear
  View Answer play_arrow

• question_answer37) Typical growth curve in plants is [NEET [C] 2015]
  A)
  sigmoid
  done clear
  B)
  linear
  done clear
  C)
  stair-steps shaped
  done clear
  D)
  parabolic
  done clear
  View Answer play_arrow

• question_answer38) Auxin can be bioassayed by [NEET (Re) 2015]
  A)
  Avena coleoptile curvature
  done clear
  B)
  hydroponics
  done clear
  C)
  photometer
  done clear
  D)
  lettuce hypocotyl elongation
  done clear
  View Answer play_arrow

• question_answer39) The avena curvature is used for bioassay of: [NEET - 2016 Phase-I]
  A)
  \[ABA\]
  done clear
  B)
  \[G{{A}_{3}}\]
  done clear
  C)
  \[IAA\]
  done clear
  D)
  Ethylene
  done clear
  View Answer play_arrow

• question_answer40) You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
  A)
  IAA and gibberellin
  done clear
  B)
  Auxin and cytokinin
  done clear
  C)
  Auxin and abscisic acid
  done clear
  D)
  Gibberellin and abscisic acid
  done clear
  View Answer play_arrow

• question_answer41) It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield? [NEET 2019]
  A)
  Gibberellin and Abscicic acid
  done clear
  B)
  Cytokinin and Abscisic acid
  done clear
  C)
  Auxin and Ethylene
  done clear
  D)
  Gibberellin and Cytokinin
  done clear
  View Answer play_arrow

• question_answer42) Which of the following is not an inhibitory substance governing seed dormancy? [NEET 2020]
  A)
  Abscisic acid
  done clear
  B)
  Phenolic acid
  done clear
  C)
  Para-ascorbic acid
  done clear
  D)
  Gibberellic acid
  done clear
  View Answer play_arrow