Description : Which of the following control the root initiation, cell elongation and apical dominance? (A)Auxins (B) ABA (C) Gibberellins (D) Ethylene
Last Answer : (D) Ethylene
Last Answer : (B) ABA
Description : Hormone pair required for a callus to differentiate is a. auxin and cytokinin b. auxin and ethylene c. auxin and abscisic acid d. cytokinin and gibberellins
Last Answer : a. auxin and cytokinin
Description : The hormone responsible for ripening of fruits is (a) Ethylene (b) Cytokinin (c) Auxin (d) ABA
Last Answer : Ans. ((a))
Description : The hormone reducing transpiration rate by inducing stomatal closure is: (a) ABA (b) Ethylene (c) Cytokipin (d) Auxin
Description : Which one of the following generally acts as an antagonist to gibberellins? (a) Zeatin (b) Ethylene (c) ABA (d) IAA
Last Answer : (c) ABA
Description : The following is not a plant growth regulator a) Acetic acid b) Auxins c) Gibberellins d) Ethylene
Last Answer : a) Acetic acid
Description : Which of the following hormones can replace vernalisation? (a) Auxin (b) Cytokinin (c) Gibberellins (d) Ethylene
Last Answer : (c) Gibberellins
Description : Hormone responsible for senescence is (a) ABA (b) auxin (c) GA (d) cytokinin.
Last Answer : (a) ABA
Description : A plant hormone used for inducing morphogenesis in plant tissue culture is (a) cytokinins (b) ethylene (c) abscisic acid (d) gibberellins.
Last Answer : (a) cytokinins
Description : Which plant growth regulator is used for ripening? a) GA b) IBA c) Ethylene d) Cytokinin
Last Answer : c) Ethylene
Description : Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone (a) auxin (b) cytokinin (c) ethylene (d) abscisic acid.
Last Answer : (a) auxin
Description : Small cut pieces of soft stems are placed in growth medium with following plant hormones. Which combination of plant hormones will show slowest growth ? (1) Auxin + Cytokinin (2) Gibberellins + Auxin (3) Gibberellins + Cytokinin (4) Abscisic Acid + Auxin
Last Answer : (4) Abscisic Acid + Auxin
Description : Which hormone is responsible for fruit ripening? (a) Ethylene (b) Auxin (c) Ethyl chloride (d) Cytokinin
Last Answer : (a) Ethylene
Description : Phototropic and geotropic movements are linked to (a) gibberellins (b) enzymes (c) auxin (d) cytokinins.
Last Answer : (c) auxin
Description : Plant growth regulator used for sucker control in Tobacco is a. IAA b. ABA c. GA d. MH
Last Answer : d. MH
Description : In green plants light favour the formation of a. Auxin b. GA c. ABA d. IBA
Last Answer : Auxin
Description : The regulator which retards ageing/senescence of plant parts is (a) cytokinin (b) auxin (c) gibberellin (d) abscisic acid.
Last Answer : (a) cytokinin
Description : What plant hormone inhibits abscission? -Biology
Last Answer : answer:
Description : Cut or excised leaves remain green for long if induced to root or dipped in (a) gibberellins (b) cytokinins (c) auxins (d) ethylene.
Last Answer : (b) cytokinins
Description : Cell elongation in internodal regions of the green plants takes place due to (a) indole acetic acid (b) cytokinins (c) gibberellins (d) ethylene
Last Answer : (c) gibberellins
Description : During seed germination, its stored food is mobilized by (a) ABA (b) gibberellin (c) ethylene (d) cytokinin.
Last Answer : (b) gibberellin
Description : The Avena curvature is used for bioassay of (a) IAA (b) ethylene (c) ABA (d) GA3.
Last Answer : (a) IAA
Description : Rootex contains a) Auxins b) ABA c) Kinetin d) Ethylene
Last Answer : a) Auxins
Description : Abscisic acid (ABA) is natural plant hormone, which: a. Promote the growth b. Initiate the ripening c. Induce the fruit maturity d. retards the growth
Last Answer : retards the growth
Description : Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop. (a) Cytokinin (b) Gibberellin (c) Ethylene (d) Abscisic acid
Last Answer : (b) Gibberellin
Description : Name the hormone which regulate abscission and dormancy.
Last Answer : Name the hormone which regulate abscission and dormancy.
Description : Phototropic movement is controlled by (1) Auxin (2) Gibberellin (3) Cytolthiin (4) Ethylene
Last Answer : (1) Auxin Explanation: Phototropism is the growth of organisms in response to light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from ... in quicker growth on the darker side and bending of the shoot toward the source of light.
Description : Coconut milk is used in tissue culture in which present (a) cytokinin (b) auxin (c) gibberellin (d) ethylene.
Description : The major auxin produced in plants is: a. Indole-3-butyric acid (IBA) b. Naphthalene acetic acid (NAA) c. Indole-3-acetic acid (IAA) d. Ethylene
Last Answer : Indole-3-acetic acid (IAA)
Description : Which is employed for artificial ripening of banana fruits? (a) Auxin (b) Coumarin (c) Ethylene (d) Cytokinin
Last Answer : (c) Ethylene
Description : Root development is promoted by (a) abscisic acid (b) auxin (c) gibberellin (d) ethylene
Last Answer : (d) ethylene.
Description : It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield? ... (b) Auxin and Ethylene (c) Gibberellin and Cytokinin (d) Gibberellin and Abscisic acid
Last Answer : (b) Auxin and Ethylene
Description : Phototropic movement is controlled by (1) Auxin (2) Gibberellin (3) Cytokinin (4) Ethylene
Description : Callus is induced to form roots in the medium of (a) Auxin (b) Cytokinins only (c) Morecytokinins than auxin (d) Moreauxin than cytokinins
Last Answer : (d) Moreauxin than cytokinins
Description : Compounds possessing hormone like properties which have small molecular weight, are termed as : a. Auxins b. Gibberellins c. Kinins d. None of these
Last Answer : Kinins
Description : During propagation through cuttings, which hormone(s) is/are used for root promotion? a. ABA b. Seradix c. NAA d. All above
Last Answer : Seradix
Description : The hormone responsible for apical dominance is (a) IAA (b) GA (c) ABA (d) Florigen.
Description : Which hormone breaks dormancy of potato tuber? (a) Gibberellin (b) IAA (c) ABA (d) Zeatin
Last Answer : (a) Gibberellin
Description : What kind of hormone is auxin ?
Last Answer : Auxin phytohormones.
Last Answer : : Axin is named after Haxon and Sneet
Last Answer : Charles Darwin discovers the hormone auxin
Description : Hormone used in tissue culture for better growth is: (1) Auxin (2) Gibberellin (3) Cytokinin (4) Vernalin
Last Answer : Ans. ((d))
Description : The precursor of ethylene is (A)Histidine (B) Glycine (C)Tryptophane (D) Methionine
Last Answer : (D) Methionine
Description : Why is ethylene a unique plant hormone? -Biology
Description : Which of the following plant hormone was first isolated from a fungus? (a) Ethylene (b) Gibberellic acid (c) Kinetin (d) Zeatin
Last Answer : Ans:(b)
Description : Consider the following pairs Plant hormone Function/Effect 1. Indole-3 acetic acid - Rooting in cuttings 2. Gibberellic acid - Stomatal closure 3. Ethylene - Fruit ripening 4. Zeatin - Cell division Which of the above pairs are correctly matched ... 3 (b) 1, 2, and 4 (c) 2 and 4 (d) 1, 2, 3, and 4