Description : Which hormone breaks dormancy of potato tuber? (a) Gibberellin (b) IAA (c) ABA (d) Zeatin
Last Answer : (a) Gibberellin
Description : The Avena curvature is used for bioassay of (a) IAA (b) ethylene (c) ABA (d) GA3.
Last Answer : (a) IAA
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 : A plant hormone, which is primary regulator of abscission process is (a) Ethylene (b) Auxin (c) ABA (d) Gibberellins
Last Answer : (c) ABA
Description : Hormone primarily connected with cell division is (a) IAA (b) NAA (c) cytokinin/zeatin (d) gibberellic acid.
Last Answer : (c) cytokinin/zeatin
Description : Which of the following enhances or induces fusion of protoplasts? (a) IAA and kinetin (b) IAA and gibberellins (c) Sodium chloride and potassium chloride (d) Polyethylene glycol and sodium nitrate
Last Answer : (d) Polyethylene glycol and sodium nitrate
Description : The hormone responsible for apical dominance is (a) IAA (b) GA (c) ABA (d) Florigen.
Description : Plant growth regulator used for sucker control in Tobacco is a. IAA b. ABA c. GA d. MH
Last Answer : d. MH
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
Description : Which of the following prevents the fall of fruits? (a) GA3 (b) NAA (c) Ethylene (d) Zeatin
Last Answer : (b) NAA
Description : One of the commonly used plant growth hormone in tea plantations is (a) ethylene (b) abscisic acid (c) zeatin (d) indole-3-acetic acid.
Last Answer : d) indole-3-acetic acid.
Description : Artificial ripening of fruits is accomplished by treatment with: (a) Sodium chloride (b) IAA (c) Ethylene gas (d) Kinetin
Last Answer : Ans. ((c))
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 : Seed dormancy is due to the (a) ethylene (b) abscisic acid (c) IAA (d) starch.
Last Answer : (b) abscisic acid
Description : Which of the following hormones can replace vernalisation? (a) Auxin (b) Cytokinin (c) Gibberellins (d) Ethylene
Last Answer : (c) Gibberellins
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 : 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 : 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 : 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 following is not a plant growth regulator a) Acetic acid b) Auxins c) Gibberellins d) Ethylene
Last Answer : a) Acetic acid
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 : During seed germination, its stored food is mobilized by (a) ABA (b) gibberellin (c) ethylene (d) cytokinin.
Last Answer : (b) gibberellin
Description : Rootex contains a) Auxins b) ABA c) Kinetin d) Ethylene
Last Answer : a) Auxins
Description : What is the full form of IAA ?
Last Answer : The full form of IAA International Advertising Association.
Description : $ Insectivorous plants get nitrogenous nutrition from the insects. IAA is growth promoter.
Last Answer : $ Insectivorous plants get nitrogenous nutrition from the insects. IAA is growth promoter. A. If both As and ... wrong D. If both As and R are wrong.
Description : Which of the following statement is correct? (1) The causal organism for foolish seedling disease is the source of gibberellin (2) Abscisic acid is a growth promoter (3) The ratio of auxin : cytokinin control cell differentiation (4) Bolting of cabbage can be induced by treatment with IAA
Last Answer : Ans. ((d))
Description : Which element is involved in biosynthesis of IAA ? (A) Nitrogen (B) Boron (C) Zinc (D) Copper
Last Answer : (C) Zinc
Description : The first ever auxin discovered was: a. IBA b. IPA c. IAA d. None of above
Last Answer : IAA
Description : Seed potato dormancy is broken by ? a IAA b NAA c Thiourea d CCC
Last Answer : c Thiourea
Description : Which one of the following pairs, is not correctly matched? (a) Gibberellic acid - Leaf fall (b) Cytokinin - Cell division (c) IAA - Cell wall elongation (d) Abscissic acid - Stomatal closure
Last Answer : (a) Gibberellic acid - Leaf fall
Description : The pineapple which under natural condition is difficult to blossom has been made to produce fruits throughout the year by application of (a) NAA, 2, 4-D (b) Phenyl acetic acid (c) Cytokinin (d) IAA, IBA.
Last Answer : a) NAA, 2, 4-D
Description : Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what ... . (c) It supports the hypothesis that IAA is auxin. (d) It demonstrated polar movement of auxins
Last Answer : (a) It made possible the isolation and exact identification of auxin.
Description : You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots? ... gibberellin (b) Auxin and cytokinin (c) Auxin and abscisic acid (d) Gibberellin and abscisic acid
Last Answer : (b) Auxin and cytokinin
Description : Match the following concerning essential elements and their functions in plants. Column-I Column-II (A) Iron (i) Photolysis of water (B) Zinc (ii) Pollen germination (C) Boron (iii) Required for chlorophyll biosynthesis (D) Manganese (iv) IAA biosynthesis
Last Answer : (c) (iii) (iv) (ii) (i)
Description : For berry elongation in Grape ____ hormone is used a. IAA b. IBA c. GA3 d. ABB
Last Answer : c. GA3
Description : Growth regulating herbicides that act simi lar to that of endogenous auxin (IAA) a). Benzoic acid b). pyridine carboxylic acid c). quinoline carboxylic acid d). All
Last Answer : d). All
Description : Who discovered gibberellins? -Biology
Last Answer : answer:
Description : Function of gibberellins in plants. -Biology
Description : Difference between auxins and gibberellins? -Biology
Description : Commercial uses of gibberellins. -Biology
Description : Leaf senescence can be retarded by the application of : a. Auxins b. Gibberellins c. Kinins d. Abscicic acid
Last Answer : Kinins
Description : ________ can release lateral buds from apical dominance : a. Auxins b. Gibberellins c. Kinins d. None of above
Description : ________ have ability to alter the sex of the flowers: a. Auxins b. Gibberellins c. Kinins d. None of above
Last Answer : Gibberellins
Description : Direction of plant growth is controlled by: a. Auxins b. Gibberellins c. Kinins d. All of above
Last Answer : Auxins
Description : Many _________ in super optimal concentrations also act as growth inhibitors : a. Auxins b. Gibberellins c. Cytokinins d. All of above