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61.
In callus culture, roots can be induced by the supply of

auxin

cytokinin

gibberelin

ethylene

auxin

Callus is a irregular, unorganised and undifferentiated mass of actively dividing cells. It's differentiation is under the control of two hormones: auxin and cytokinin.

Development of Condition

Root $\frac{Auxin}{Cytokinin} = High$

Shoot $\frac{Auxin}{Cytokinin} = Low$

Both root and shoot $\frac{Auxin}{Cytokinin} = Intermediate$

62.

The bioassay of auxin is

avena curvature test
callus formation
culture of fungus
seed dormancy

63.

Induction of flowering by low temperature treatment is

vernalization
cryobiology
photoperiodism
prunning

64.

The bioassay of auxin is

avena curvature test
callus formation
culture of fungus
seed dormancy

65.

Which one of the following is a natural growth inhibitor?

66.

Apical dominance is caused by

auxin
gibberellin
kinetin
ABA

67.

Which of the following is not caused by deficiency of mineral?

Chlorosis
Etiolation
Shortening of internodes
Necrosis

68.

Which of the following plant is LDP?

Xanthium
Soybean
Wheat
Tobacco

69.

In which one pair both the plants can be vegetatively propagated by leaf pieces?

Bryophyllum and Kalanchoe
Chrysanthemum and Agave
Agave and Kalanchoe
Asparagus and Bryophyllum

70.

Gibberellin was first extracted from

Gibberella fujikuro
algae
bacteria
roots of higher plants

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Plant Growth and Development

Multiple Choice Questions

61.
In callus culture, roots can be induced by the supply of

auxin

cytokinin

gibberelin

ethylene

Development of	Condition
Root	$\frac{Auxin}{Cytokinin} = High$
Shoot	$\frac{Auxin}{Cytokinin} = Low$
Both root and shoot	$\frac{Auxin}{Cytokinin} = Intermediate$

Previous Year Papers

Test Series

Test Yourself

Multiple Choice Questions

61. In callus culture, roots can be induced by the supply of auxin cytokinin gibberelin ethylene

61.
In callus culture, roots can be induced by the supply of

auxin

cytokinin

gibberelin

ethylene