166893
Dwarfness can be controlled by treating the plant with
1 Cytokinin
2 Gibberellic acid
3 Auxin
4 Anti-gibberellin
Explanation:
B Dwarfness can be controlled by treating the plants with gibberellic acid. It has been proven that dwarf plants have lower level of GA, which causes the dwarfism. Thus the external supply causes rapid elongation of internodes.
[AIPMT-2000
Plant growth and development
166894
Perishable vegetables can be maintained fresh for a longer period by spraying on them with a solution of:
1 $\mathrm{ABA}$
2 Cytokinin
3 Ethephon
4 Phenyl mercuric acetate
Explanation:
B Cytokinin :- Cytokinins are plant growth hormones. They are amino derived. These hormones promotes cell division in plant. Cytokinins play important roles in fruit development, especially in cell Hence, perishable vegetables are sprayed with a solution of cytokinin to keep them fresh for a longer time and increases their shelf life.
[Karnataka CET-2012]
Plant growth and development
166895
Which one of the following synthetic growth regulators is used to promote synchronized flowering in pineapple?
1 Phenylmercuric Acetate
2 Benzyl Aminopurine
3 2-chloroethylphosphonic acid
4 Indolebutyric acid
Explanation:
C 2-chloroethyl phosphonic acid also known as 'Ethepon' is used for ripening of fruit as it release ethylene. The 2-Chloroethyl phosphoric acid is a compound which is used for the plant growth and helps in the ripening of the fruit quickly. It is widely used to initiate the reproductive development of the pineapple, these are sprayed on the mature pineapple that is green pineapple, they are then converted to ethylene that has low toxic levels and thus, flowering is promoted.
[Karnataka CET-2010]
Plant growth and development
166896
Which one of the following plant hormone was isolated from human urine?
1 Synthetic auxin 2, 4-D,
2 Gibberellins
3 Heteroauxin indole acetic acid
4 IBA
Explanation:
C The most important phytohormones "Auxin" (indole -3- acetic acid) was first isolated by Kogl and Haegan Smith (1934) in human urine.
166893
Dwarfness can be controlled by treating the plant with
1 Cytokinin
2 Gibberellic acid
3 Auxin
4 Anti-gibberellin
Explanation:
B Dwarfness can be controlled by treating the plants with gibberellic acid. It has been proven that dwarf plants have lower level of GA, which causes the dwarfism. Thus the external supply causes rapid elongation of internodes.
[AIPMT-2000
Plant growth and development
166894
Perishable vegetables can be maintained fresh for a longer period by spraying on them with a solution of:
1 $\mathrm{ABA}$
2 Cytokinin
3 Ethephon
4 Phenyl mercuric acetate
Explanation:
B Cytokinin :- Cytokinins are plant growth hormones. They are amino derived. These hormones promotes cell division in plant. Cytokinins play important roles in fruit development, especially in cell Hence, perishable vegetables are sprayed with a solution of cytokinin to keep them fresh for a longer time and increases their shelf life.
[Karnataka CET-2012]
Plant growth and development
166895
Which one of the following synthetic growth regulators is used to promote synchronized flowering in pineapple?
1 Phenylmercuric Acetate
2 Benzyl Aminopurine
3 2-chloroethylphosphonic acid
4 Indolebutyric acid
Explanation:
C 2-chloroethyl phosphonic acid also known as 'Ethepon' is used for ripening of fruit as it release ethylene. The 2-Chloroethyl phosphoric acid is a compound which is used for the plant growth and helps in the ripening of the fruit quickly. It is widely used to initiate the reproductive development of the pineapple, these are sprayed on the mature pineapple that is green pineapple, they are then converted to ethylene that has low toxic levels and thus, flowering is promoted.
[Karnataka CET-2010]
Plant growth and development
166896
Which one of the following plant hormone was isolated from human urine?
1 Synthetic auxin 2, 4-D,
2 Gibberellins
3 Heteroauxin indole acetic acid
4 IBA
Explanation:
C The most important phytohormones "Auxin" (indole -3- acetic acid) was first isolated by Kogl and Haegan Smith (1934) in human urine.
166893
Dwarfness can be controlled by treating the plant with
1 Cytokinin
2 Gibberellic acid
3 Auxin
4 Anti-gibberellin
Explanation:
B Dwarfness can be controlled by treating the plants with gibberellic acid. It has been proven that dwarf plants have lower level of GA, which causes the dwarfism. Thus the external supply causes rapid elongation of internodes.
[AIPMT-2000
Plant growth and development
166894
Perishable vegetables can be maintained fresh for a longer period by spraying on them with a solution of:
1 $\mathrm{ABA}$
2 Cytokinin
3 Ethephon
4 Phenyl mercuric acetate
Explanation:
B Cytokinin :- Cytokinins are plant growth hormones. They are amino derived. These hormones promotes cell division in plant. Cytokinins play important roles in fruit development, especially in cell Hence, perishable vegetables are sprayed with a solution of cytokinin to keep them fresh for a longer time and increases their shelf life.
[Karnataka CET-2012]
Plant growth and development
166895
Which one of the following synthetic growth regulators is used to promote synchronized flowering in pineapple?
1 Phenylmercuric Acetate
2 Benzyl Aminopurine
3 2-chloroethylphosphonic acid
4 Indolebutyric acid
Explanation:
C 2-chloroethyl phosphonic acid also known as 'Ethepon' is used for ripening of fruit as it release ethylene. The 2-Chloroethyl phosphoric acid is a compound which is used for the plant growth and helps in the ripening of the fruit quickly. It is widely used to initiate the reproductive development of the pineapple, these are sprayed on the mature pineapple that is green pineapple, they are then converted to ethylene that has low toxic levels and thus, flowering is promoted.
[Karnataka CET-2010]
Plant growth and development
166896
Which one of the following plant hormone was isolated from human urine?
1 Synthetic auxin 2, 4-D,
2 Gibberellins
3 Heteroauxin indole acetic acid
4 IBA
Explanation:
C The most important phytohormones "Auxin" (indole -3- acetic acid) was first isolated by Kogl and Haegan Smith (1934) in human urine.
166893
Dwarfness can be controlled by treating the plant with
1 Cytokinin
2 Gibberellic acid
3 Auxin
4 Anti-gibberellin
Explanation:
B Dwarfness can be controlled by treating the plants with gibberellic acid. It has been proven that dwarf plants have lower level of GA, which causes the dwarfism. Thus the external supply causes rapid elongation of internodes.
[AIPMT-2000
Plant growth and development
166894
Perishable vegetables can be maintained fresh for a longer period by spraying on them with a solution of:
1 $\mathrm{ABA}$
2 Cytokinin
3 Ethephon
4 Phenyl mercuric acetate
Explanation:
B Cytokinin :- Cytokinins are plant growth hormones. They are amino derived. These hormones promotes cell division in plant. Cytokinins play important roles in fruit development, especially in cell Hence, perishable vegetables are sprayed with a solution of cytokinin to keep them fresh for a longer time and increases their shelf life.
[Karnataka CET-2012]
Plant growth and development
166895
Which one of the following synthetic growth regulators is used to promote synchronized flowering in pineapple?
1 Phenylmercuric Acetate
2 Benzyl Aminopurine
3 2-chloroethylphosphonic acid
4 Indolebutyric acid
Explanation:
C 2-chloroethyl phosphonic acid also known as 'Ethepon' is used for ripening of fruit as it release ethylene. The 2-Chloroethyl phosphoric acid is a compound which is used for the plant growth and helps in the ripening of the fruit quickly. It is widely used to initiate the reproductive development of the pineapple, these are sprayed on the mature pineapple that is green pineapple, they are then converted to ethylene that has low toxic levels and thus, flowering is promoted.
[Karnataka CET-2010]
Plant growth and development
166896
Which one of the following plant hormone was isolated from human urine?
1 Synthetic auxin 2, 4-D,
2 Gibberellins
3 Heteroauxin indole acetic acid
4 IBA
Explanation:
C The most important phytohormones "Auxin" (indole -3- acetic acid) was first isolated by Kogl and Haegan Smith (1934) in human urine.
