1.

The Avena curvature is used for bioassay of

• GA₃

• IAA

• Ethylene

• Ethylene

During seed germination its stored food is mobilised by

• ethylene

• cytokinin

• ABA

• ABA

Match the following and select the correct answer.

• 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

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

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

• abscsic acid

• Ethylene

• GA₃

• GA₃

Auxin can be bioassayed by

• Avena coleoptile curvature

• Hydroponics

• Potometer

• Potometer

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

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

• Zeatin

• Ethylene

• ABA

• ABA

Vernalisation stimulates flowering in

• Zamikand

• Turmeric

• Carrot

• Carrot

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