Gibberellin

An enzyme that can stimulate the germination of barley seeds is:

1. $\mathrm{\backslash alpha}$-amylase

2. lipase

3. protease

4. invertase

"Foolish seedling" disease of rice led to the discovery of:

1. GA

2. ABA

3. 2, 4-D

4. IAA

Which one of the following pairs is not correctly matched?

1.	Abscisic acid - Stomatal closure
2.	Gibberellic acid - Leaves fall
3.	Cytokinin - Cell division
4.	IAA - Cell wall elongation

During seed germination its stored food is mobilized by:

1. Cytokinin

2. ABA

3. Gibberellin

4. Ethylene

Spraying of which of the following phytohormone on juvenile conifers helps in hastening the maturity period, that leads to early seed production?

1.	Abscisic Acid	2.	Indole-3-butyric Acid
3.	Gibberellic Acid	4.	Zeatin

Spraying sugarcane crop with which of the following plant growth regulators, increases the length of the stem, thus, increasing the yield?

1.	Gibberellin	2.	Cytokinin
3.	Abscisic acid	4.	Auxin