I. Kinetin is a degradative substance from DNA
II. ABA is present in all plants including lower plants
III. Low ratio of cytokinin to auxin favours root formation only
IV. ABA is synthesised catabolically through glycolysis pathway
Choose the correct combination of options
I and II
II and III
III only
III and IV
Related Questions
If shoot cuttings are treated with auxin then
They will develop roots.
They will develop shoots.
They will develop flowers.
They will not show any change.
Identify to which plant hormone, the given function belongs I. Initiates flowering in pineapples II. Induces flowering in mango III. Root growth and root hair promotion I II III
Auxin, Gibberellin, Cytokinin
Ethylene, Ethylene, Auxin
Cytokinin, Auxin, Gibberellin
Gibberellin, Cytokinin, Ethylene
Natural and synthetic-auxin (IAA, NAA, IBA, 2-4-D) have been used extensively in
Agriculture
Horticulture
Both (1) and (2)
Sericulture
Which one of the following is not a effect of gibberellin?
Increase grapes stalk
Delay senescence of fruit
Induce dormancy
Increase sugarcane stem
I. Initiate rooting in stem cuttings
II. Promote flowering in pineapples
III. Controls xylem differentiation
Identify the functions of auxin and choose the correct option
I and II
II and III
III and I
I, II and III
Ethephon
Hasten fruit ripening in tomatoes
Accelerate abscission
Promote female flower cucumbers
All of the above
Cytokinin helps in delaying the leaf falling/senescences mainly by
Promoting nutrient mobilisation
Inhibiting cell division
Promoting cell elongation
Promoting cell differentiation
One hormone helps in ripening of fruits, while the other stimulates closure of stomata. These are respectively
Abscisic acid and auxin
Ethylene and abscisic acid
Auxin and ethylene
Ethylene and gibberellic acid
Gibberellins promotes cell division and elongation in
Leaves
Roots
Shoots
All of these
Micropropagation is done by
Auxins
GA
Cytokinin
Both (1) and (3)
