Plant Growth And Development Test

Plant Growth And Development

This is Plant Growth And Development Test-04 for CBSE class 11 Biology.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Phytochrome is sensitive to
  • A
    Red and far-red light
    Correct
  • B
    Green light
  • C
    Blue light
  • D
    Red light
2
Antiauxin used in picking cotton bolls is
  • A
    NNA
  • B
    TIBA
    Correct
  • C
    2,4-D
  • D
    Ethylene
3
Which pair of enzyme promotes femaleness in flowers?
  • A
    Auxin and ethylene
    Correct
  • B
    None of these
  • C
    Ethylene and cytokinins
  • D
    Auxin and abscisic acid
4
What would be expected to happen if a rotten fruit gets mixed with unripe fruits
  • A
    Slow down the ripening of unripe fruits
  • B
    Unripe fruits have no effect
  • C
    Rot the unripe fruits
  • D
    Hastening ripening of unripe fruits
    Correct
5
If GA3 is applied to the rice seedlings, the plant will show
  • A
    Delayed ripening
  • B
    Extra elongation
    Correct
  • C
    Dwarfing
  • D
    Early flowering
6
You forget to add Cytokinin the culture medium, there will be very little growth as Cytokinin is essential for
  • A
    Cell division and cell elongation
  • B
    Cell division and cell differentiation
    Correct
  • C
    Cell differentiation and cell elongation
  • D
    Cell maturation and cell expansion
7
A student culture a callus from the tobacco pith in sterilized minimal nutritive medium but add more Cytokinin than Auxin. What would develop first from callus
  • A
    Shoots
  • B
    Buds
    Correct
  • C
    Roots
  • D
    Leaves
8
In wheat field some broad-leaved weeds were seen by a farmer, which plant hormone would you suggest to get rid of the same?
  • A
    2 : 4-D and 2 : 4 :5 T
    Correct
  • B
    2 : 5-D and 2 : 5 :5 T
  • C
    2 : 2-D and 2 : 4 :6 T
  • D
    2 : 6-D and 2 : 2 :5 T
9
Auxin precursor for IAA is
  • A
    Tryptophan
    Correct
  • B
    Alanine
  • C
    Buteric acid
  • D
    Aspartic acid
10
Photoperiodism stimulus is perceived by
  • A
    Meristem
  • B
    Leaves
    Correct
  • C
    Flower
  • D
    Buds
11
Flowering in short day plants is stimulated by
  • A
    Short day interrupted long nights
  • B
    Short day and uninterrupted long nights
    Correct
  • C
    Short day and short night
  • D
    Short nights
12
Vernalisation takes place in response to
  • A
    High light intensity
  • B
    Low temperature
    Correct
  • C
    High temperature
  • D
    Low temperature
13
A process of shortening of the juvenile or vegetative phase and hastening flowering by a previous cold treatment is
  • A
    Cold and hot treatment
  • B
    Photoperiodic
  • C
    Shortening
  • D
    Vernalization
    Correct
14
Short day plants are also called long night plant because they require a continuous
  • A
    Critical dark period
    Correct
  • B
    interrupted night period
  • C
    Uninterrupted light period
  • D
    Critical light period
15
Photoperiodism was discovered by
  • A
    Garner and Allard
  • B
    F.F.Blackman
    Correct
  • C
    W.Went
  • D
    F.E.Fritsch