Consider the following statements regarding growth in plants -

I:	Cell enlargement requires water.
II:	Oxygen helps in releasing metabolic energy for growth activities.
III:	Nutrients are required for synthesis of protoplasm and act as source of energy.

Which of the above statements are true?

1.	I and II only	2.	I and III only
3.	II and III only	4.	I, II, and III

With respect to photoperiodism, the short day plant, the long day plant and day neutral plant are represented respectively by:
  
1. A, B and C
2. B, A and C
3. C, B and A
4. A, C and B

Plant Growth Regulators (PGRs) are not

1. Very less in number in plants

2. Small and simple molecules

3. Diverse chemical composition

4. Plant hormones or phytohormones

N6- furfurylamino purine and kinetin are derivative of …….

1.Indol compounds

2.Adenine

3.carotenoids

4.Terpenes

C₂H₄ or Ethylene are …...or derivative of….

1.Indol compounds

2.Gases

3.carotenoids

4.Terpenes

In the living plant body, the PGRs can be broadly divided into two groups. This classification is actually based on

1.Function

2.Structure

3.Metabolism

4.Kinetin

Plant growth promoters are not involved in

Which of the following hormones is common in both the categories of plant promoter and plant inhibitor?

1.GA

2.ABA

3.Auxin

4.Ethylene

Which of the following is wrong?

1.ABA is Growth inhibiting regulator

2.Ethylene could fit either of the groups, inhibitors and activators.

3.Auxins, GA and Cytokinins are plant promoters

4.Ethylene is largely a promoter of growth activities

The Discovery of PGRs