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Plant Growth and Development

Multiple Choice Questions

The Avena curvature is used for bioassay of

GA₃
IAA
Ethylene
Ethylene

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During seed germination its stored food is mobilised by

ethylene
cytokinin
ABA
ABA

1459 Views

Match the following and select the correct answer.

Column I		Column II
A.	Centriole	1.	Infolding in mitochondria
B.	Chlorophyll	2.	Thylakoids
C.	Cristae	3.	Nucleic acid
D.	Ribozymes	4.	Basal body cilia of flagella

A

B

C

D

4

3

1

2
A

B

C

D

1

2

4

3
A

B

C

D

1

3

2

4
A

B

C

D

1

3

2

4

857 Views

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?

Mutated
Embolised
Etiolated
Etiolated

793 Views

Which one of the following growth regulators is known as stress hormone?

abscsic acid
Ethylene
GA₃
GA₃

576 Views

Auxin can be bioassayed by

Avena coleoptile curvature
Hydroponics
Potometer
Potometer

750 Views

Through their effect on plant growth regulators, what do the temperature and light control in the plants?

Apical dominance
Flowering
Closure of stomata
Closure of stomata

863 Views

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

Zeatin
Ethylene
ABA
ABA

964 Views

Vernalisation stimulates flowering in

Zamikand
Turmeric
Carrot
Carrot

631 Views

10.
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?

Green plants need light to perform photosynthesis.

Green plants seek light because they are phototropic

Light stimulates plant cells on the lighted side to grow faster

Light stimulates plant cells on the lighted side to grow faster

Light stimulates plant cells on the lighted side to grow faster

When a green plant exposed to light (phototropism) on one side, which make it bend towards the source of light is due to the effect of auxins. Auxin accumulates on the shaded side due to which it stimulates cell elongation and enlargement. Its movement is polar and passes from shoot tip to region of elongation. It helps in elongation of both roots and shoots. Auxin(indole 3-acetic acid) also produces tropical responses like phototropism and geotropism.

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