Gibberellin

Q. Which of the following is caused by gibberellins?

1. Bolting in cabbage
2. Morphogenesis in tobacco callus
3. Rapid divisions in carrot cells
4. Elongation of oat coleoptile

Q. V-amylase test is a bioassay for ______.

1. auxins
2. GA
3. cytokinin
4. ABA

Q. The hormone isolated from the rice plants that were infected by 'foolish seedling disease' is _______.

1. Cytokinins

2. Auxins

3. ABA

4. Gibberellins

Q. Bakane disease is due to secretion of a fungus called __

Q. Gibberellic acid was originally discovered in _______.

1. algae
2. fungi
3. bacteria
4. virus

Q.

Gibberellins can promote seed germination because of their influence on

1. Synthesis of abscisic acid

2. Production of hydrolyzing enzymes

3. Rate of cell division

4. Absorption of water through the hard seed coat.

Q.

Cell elongation in internodal regions of the green plants takes place due to:

1. Cytokinins

2. Gibberellins

3. Ethylene

4. Indole acetic acid

Q.

Which one of the following pairs is not correctly matched?

1. Gibberellic acid -Leaf fall

2. Abscisic acid -Stomatal closure

3. Cytokinin -Cell division

4. IAA -Cell wall elongation

Q.

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

1. IAA

2. GA

3. ABA

4. 2, 4-D

Q.

Plant growth regulator present in the sterile filtrates of the fungus?

1. Inhibitor B

2. Adenine derivative

3. Indole conpound

4. Gibberellic acid