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Plant Growth and Development: Class-XI


Previous Year Questions (PYQs)

MCQ Practice


MCQs on Plant Growth and Development: Class-XI for NEET Practice


Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?

NEET-2023 [Plant-Growth-and-Development] [class-xi ]

  • Abscisic Acid
  • Indole-3-butyric Acid
  • Gibberellic Acid
  • Zeatin
  • Correct Option: C  [ Gibberellic Acid ]

    Remark:

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: ATP is used at two steps in glycolysis.
Reason R: First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6- phosphate into fructose-1-6-diphosphate.
In the light of the above statements, choose the correct answer from the options given below is true,

NEET-2023 [Plant-Growth-and-Development] [class-xi ]

  • Senescence
  • Differentiation
  • Dedifferentiation
  • Development
  • Correct Option: C  [ Dedifferentiation ]

    Remark:

Which hormone promotes intemode/petiole elongation in deep water rice?

NEET-2023 [Plant-Growth-and-Development] [class-xii ]

  • 2, 4-D
  • GA3
  • Kinetin
  • Ethylene
  • Correct Option: D  [ Ethylene ]

    Remark:

Production of Cucumber has increased manifold in recent years. Application of which of the following phytohormones has resulted in this increased yield as the hormone is known to produce female flowers in the plants :

NEET-2022 [Plant-Growth-and-Development] [class-xi ]

  • ABA
  • Gibberellin
  • Ethylene
  • Cytokinin
  • Correct Option: C  [ Ethylene ]

    Remark:

Which one of the following plants does not show plasticity?

NEET-2022 [Plant-Growth-and-Development] [class-xi ]

  • Cotton
  • Coriander
  • Buttercup
  • Maize
  • Correct Option: D  [ Maize ]

    Remark:

The gaseous plant growth regulator is used in plants to:

NEET-2022 [Plant-Growth-and-Development] [class-xi ]

  • speed up the malting process
  • promote root growth and root hair formation to increase the absorption surface
  • help overcome apical dominance
  • kill dicotyledonous weeds in the fields
  • Correct Option: B  [ promote root growth and root hair formation to increase the absorption surface ]

    Remark:

The site of perception of light in plants during photoperiodism is:

NEET-2021 [Plant-Growth-and-Development] [class-xi ]

  • Shoot apex
  • Stem
  • Axillary bud
  • Leaf
  • Correct Option: D  [ Leaf ]

    Remark:

The plant hormone used to destroy weeds in a field is:

NEET-2021 [Plant-Growth-and-Development] [class-xi ]

  • IAA
  • NAA
  • 2,4-D
  • IBA
  • Correct Option: C  [ 2,4-D ]

    Remark:

Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:

NEET-2021 [Plant-Growth-and-Development] [class-xi ]

  • Elasticity
  • Flexibility
  • Plasticity
  • Maturity
  • Correct Option: C  [ Plasticity ]

    Remark:

Inhibitory substances in dormant seeds cannot be removed by subjecting seeds to:

NEET-(Oct)2020 [Plant-Growth-and-Development] [class-xi ]

  • Gibberellic acid
  • Nitrate
  • Ascorbic acid
  • Chilling conditions
  • Correct Option: C  [ Ascorbic acid ]

    Remark: