Description : How was auxin discovered? -Biology
Last Answer : answer:
Last Answer : Charles Darwin discovers the hormone auxin
Description : The first ever auxin discovered was: a. IBA b. IPA c. IAA d. None of above
Last Answer : IAA
Description : Difference between auxin and cytokinin? -Biology
Description : What is auxin in plants? -Biology
Description : What does auxin do in plants? -Biology
Description : Where is auxin produced in a plant? -Biology
Description : What is the role of auxin in plants ?
Last Answer : The role of auxin in plants is as follows : Prevents premature fall of fruit. Helps to produce seedless fruit. Auxin is also used for seed germination and weed control.
Description : What kind of hormone is auxin ?
Last Answer : Auxin phytohormones.
Last Answer : : Axin is named after Haxon and Sneet
Last Answer : Auxin delays fruit release.
Description : Movement of auxin is
Last Answer : Movement of auxin is A. Centripetal B. Basipetal C. Acropetal D. Both (B)and (C)
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 : Development of shoot and root is determined by: (a) Cytokinin and auxin ratio (b) Enzymes (c) Temperature (d) Plant nutrients
Last Answer : Ans. ((a))
Description : Hormone used in tissue culture for better growth is: (1) Auxin (2) Gibberellin (3) Cytokinin (4) Vernalin
Description : The hormone responsible for ripening of fruits is (a) Ethylene (b) Cytokinin (c) Auxin (d) ABA
Description : The hormone reducing transpiration rate by inducing stomatal closure is: (a) ABA (b) Ethylene (c) Cytokipin (d) Auxin
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 : The synthetic auxin which is used as a herbicide?
Last Answer : 2.4 - Dichloro Phenoxy Acetic Acid (2; 4-D)
Description : Coconut milk is used in tissue culture in which present (a) cytokinin (b) auxin (c) gibberellin (d) ethylene.
Last Answer : (a) cytokinin
Description : Which of the following statements is not true about somatic embryogenesis? (a) The pattern of development of a somatic embryo is comparable to that of a zygotic embryo. (b) Somatic embryos can develop from ... an auxin such as 2, 4-D. (d) A somatic embryo develops from a somatic cell.
Last Answer : (b) Somatic embryos can develop from microspores.
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 : Auxin destruction activity is inhibited by : a. Blue light b. Red light c. Green light d. None of the above
Last Answer : Red light
Description : In plants auxin are mainly present in: a. Root tips b. Stem end c. Shoot tips d. Leaf margins
Last Answer : Shoot tips
Description : The compounds which inhibit the activity of auxins are known as: a. Auxin antagonists b. Antiauxins c. Epinostic agent d. All of above
Last Answer : Antiauxins
Description : Auxin antagonists compounds interact with auxins as: a. Counteract b. Increase c. Decrease d. None of the above
Last Answer : Counteract
Description : In green plants light favour the formation of a. Auxin b. GA c. ABA d. IBA
Last Answer : Auxin
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 : A plant hormone, which is primary regulator of abscission process is (a) Ethylene (b) Auxin (c) ABA (d) Gibberellins
Last Answer : (c) ABA
Description : Which of the following hormones can replace vernalisation? (a) Auxin (b) Cytokinin (c) Gibberellins (d) Ethylene
Last Answer : (c) Gibberellins
Description : Which of the following movement is not related to auxin level? (a) Bending of shoot towards light (b) Movement of root towards soil (c) Nyctinastic leaf movements (d) Movement of sunflower head tracking the sun
Last Answer : (c) Nyctinastic leaf movements
Description : Phototropic and geotropic movements are linked to (a) gibberellins (b) enzymes (c) auxin (d) cytokinins.
Last Answer : (c) auxin
Description : Highest auxin concentration occurs (a) in growing tips (b) in leaves (c) at base of plant organs (d) in xylem and phloem
Last Answer : (a) in growing tips
Description : Which is employed for artificial ripening of banana fruits? (a) Auxin (b) Coumarin (c) Ethylene (d) Cytokinin
Last Answer : (c) Ethylene
Description : Apical dominance is caused by (a) abscisic acid in lateral bud (b) cytokinin in leaf tip (c) gibberellin in lateral buds (d) auxin in shoot tip.
Last Answer : (d) auxin in shoot tip.
Description : The regulator which retards ageing/senescence of plant parts is (a) cytokinin (b) auxin (c) gibberellin (d) abscisic acid.
Description : The movement of auxin is largely (a) centripetal (b) basipetal (c) acropetal (d) both (a) and (c).
Last Answer : (b) basipetal
Description : Which hormone is responsible for fruit ripening? (a) Ethylene (b) Auxin (c) Ethyl chloride (d) Cytokinin
Last Answer : (a) Ethylene
Description : Hormone responsible for senescence is (a) ABA (b) auxin (c) GA (d) cytokinin.
Last Answer : (a) ABA
Description : Dwarfness can be controlled by treating the plant with (a) cytokinin (b) gibberellic acid (c) auxin (d) anti-gibberellin.
Last Answer : (b) gibberellic acid
Description : Differentiation of shoot is controlled by (a) high auxin : cytokinin ratio (b) high cytokinin : auxin ratio (c) high gibberellin : auxin ration (d) high gibberellin : cytokinin ratio.
Last Answer : (b) high cytokinin : auxin ratio
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 : Coconut milk factor is (a) an auxin (b) a gibberellin (c) abscisic acid (d) cytokinin
Last Answer : (d) cytokinin.
Description : Root development is promoted by (a) abscisic acid (b) auxin (c) gibberellin (d) ethylene
Last Answer : (d) ethylene.
Description : Phototropic curvature is the result of uneven distribution of (a) gibberellin (b) phytochrome (c) cytokinins (d) auxin.
Last Answer : (d) auxin.
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.