Gibberellin

Q.

Which plant hormone is responsible for the disease named foolish seedling?

Q. Select the correct chronological order of the events occurring during callus culture.

1. Explant → Cell division → Callus → Addition of cytokinin → Cells acquire meristematic property.
2. Explant → Callus → Cell division → Addition of cytokinin → Cells acquire meristematic property.
3. Callus → Explant → Cell division → Addition of cytokinin → Cells acquire meristematic property.
4. Callus → Cell division → Explant → Addition of cytokinin → Cells acquire meristematic property.

Q. A sugarcane farmer is getting less productivity. Which hormone would you suggest to spray on the crops to get a better yield?

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

Q. For the first time, gibberellin was found in a/an ___________.

1. autoclaved herring sperm DNA
2. fungi
3. coleoptile of canary grass
4. human urine

Q. Identify the correct statement(s) related to gibberellins.

1. ${\mathrm{GA}}_1$ was the first gibberellin to be discovered.
2. The transport of gibberellins is polar.
3. Gibberellins promotes internode elongation.
4. Gibberellins hasten maturity period.

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

Q. Which hormone is used for the elongation of the genetically dwarf plants?

1. Cytokinin
2. IAA
3. Gibberellin
4. Abscisic Acid

Q.

More sugarcane juice can be extracted by spraying with:

1. Auxins

2. CK

3. GA

4. ABA

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

1. Auxins
2. ABA
3. Gibberellins
4. Cytokinins

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

1. Auxins
2. Gibberellic acid
3. Cytokinin
4. Abscisic acid

Q. For the first time, gibberellin was found in a/an ___________.

1. autoclaved herring sperm DNA
2. fungi
3. coleoptile of canary grass
4. human urine

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. Select the correct chronological order of the events occurring during callus culture.

1. Callus → Cell division → Explant → Addition of cytokinin → Cells acquire meristematic property.
2. Callus → Explant → Cell division → Addition of cytokinin → Cells acquire meristematic property.
3. Explant → Callus → Cell division → Addition of cytokinin → Cells acquire meristematic property.
4. Explant → Cell division → Callus → Addition of cytokinin → Cells acquire meristematic property.