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Plant Growth and Development · Question 46

AIPMT 2012 (Mains)MCQEasy📈 Topic in 38% papers+4−1
1

Which one of the following generally acts as an antagonist to gibberellins?

  1. Zeatin
  2. Ethylene
  3. ABA
  4. IAA

Answer

(3) ABA

Solution

As per NCERT, ABA acts as a general plant growth inhibitor and an inhibitor of plant metabolism; it acts as an antagonist to GAs.

⇒ Gibberellins break seed dormancy, while ABA induces dormancy.

Answer: (3)

AIPMT 2012 (Mains)

Keep practising — Plant Growth and Development

2

Vernalization stimulates flowering in

  1. zamikand
  2. turmeric
  3. carrot
  4. ginger.
AIPMT 2012 (Mains)
3

One of the commonly used plant growth hormones in tea plantations is

  1. ethylene
  2. abscisic acid
  3. zeatin
  4. indole-3-acetic acid
AIPMT 2010 (Mains)
4

Root development is promoted by

  1. abscisic acid
  2. auxin
  3. gibberellin
  4. ethylene
AIPMT 2010 (Mains)
5

Phototropic curvature is the result of uneven distribution of

  1. gibberellin
  2. phytochrome
  3. cytokinins
  4. auxin
AIPMT 2010 (Prelims)
6

Photoperiodism was first characterised in

  1. tobacco
  2. potato
  3. tomato
  4. cotton
AIPMT 2010 (Prelims)
7

Coiling of garden pea tendrils around any support is an example of

  1. thigmotaxis
  2. thigmonasty
  3. thigmotropism
  4. thermotaxis
AIPMT 2010 (Prelims)
8

One of the synthetic auxin is

  1. IAA
  2. GA
  3. IBA
  4. NAA
AIPMT 2009
9

Which one of the following acids is a derivative of carotenoids?

  1. Indole-3-acetic acid
  2. Gibberellic acid
  3. Abscisic acid
  4. Indole butyric acid
AIPMT 2009
10

Importance of day length in flowering of plants was first shown in

  1. cotton
  2. Petunia
  3. Lemna
  4. tobacco
AIPMT 2008
11

Senescence as an active developmental cellular process in growth and functioning of a flowering plant, is indicated in

  1. annual plants
  2. floral parts
  3. vessels and tracheid differentiation
  4. leaf abscission
AIPMT 2008

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