Description : The hormone responsible for ripening of fruits is (a) Ethylene (b) Cytokinin (c) Auxin (d) ABA
Last Answer : Ans. ((a))
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 : 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
Last Answer : Ans:(b)
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 : Rootex contains a) Auxins b) ABA c) Kinetin d) Ethylene
Last Answer : a) Auxins
Description : Which is produced during water stress that brings stomatal closure? (a) Ethylene (b) Abscisic acid (c) Ferulic acid (d) Coumarin
Last Answer : (b) Abscisic acid
Description : Hormone responsible for senescence is (a) ABA (b) auxin (c) GA (d) cytokinin.
Last Answer : (a) ABA
Description : Hormone used in tissue culture for better growth is: (1) Auxin (2) Gibberellin (3) Cytokinin (4) Vernalin
Last Answer : Ans. ((d))
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 hormone is responsible for fruit ripening? (a) Ethylene (b) Auxin (c) Ethyl chloride (d) Cytokinin
Last Answer : (a) 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 : Transpiration differs from evaporation in: (a) Rate of water loss (b) Transpiration is a physiological process while evaporation is physical process (c) Transpiration is physical process while evaporation is physiological process (d) Frequency of water loss
Last Answer : Ans. ((b))
Description : In green plants light favour the formation of a. Auxin b. GA c. ABA d. IBA
Last Answer : Auxin
Description : Abscisic acid causes (a) stomatal closure (b) stem elongation (c) leaf expansion (d) root elongation.
Last Answer : (a) stomatal closure
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 : 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 : 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
Description : Development of shoot and root is determined by: (a) Cytokinin and auxin ratio (b) Enzymes (c) Temperature (d) Plant nutrients
Description : Which one gives the most valid and recent explanation for stomatal movement? (a) Starch hydrolysis (b) Guard cell photosynthesis (c) Transpiration (d) Potassium influx and efflux
Last Answer : (d) Potassium influx and efflux
Description : Maximum loss of water occurs through a. Cuticular transpiration b. Lenticular transpiration c. stomatal transpiration d. None of these
Last Answer : c. stomatal transpiration
Description : Select the correct statement: (1) Lenticel is the exit route for transpiration (2) The action spectra of transpiration is blue and red (3) Transpiration helps the plant to remain cool (4) Transpiration can be measured by photometer
Last Answer : Ans. ((c))
Description : The shade of a tree is cooler than the shade of a roof due to: (a) Respiration (b) Photosynthesis (c) Transpiration (d) Guttation
Description : Water potential in leaf tissue is “positive” (near zero) during: (a) Low transpiration (b) Excessive absorption (c) Excessive transpiration (d) Gestation
Description : Pmcess of water exudation through hydathodes is known as: (a) Guttation (b) Transpiration (c) Evaporation (d) Bleeding
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 : Which one of the following generally acts as an antagonist to gibberellins? (a) Zeatin (b) Ethylene (c) ABA (d) IAA
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 : Artificial ripening of fruits is accomplished by treatment with: (a) Sodium chloride (b) IAA (c) Ethylene gas (d) Kinetin
Description : Ozone hole is caused by a) Acetylene b) Ethylene c) Chlorofluorocarbons d) Methane.
Last Answer : c) Chlorofluorocarbons
Description : The following is not a plant growth regulator a) Acetic acid b) Auxins c) Gibberellins d) Ethylene
Last Answer : a) Acetic acid
Description : Antitussives act by (a) Liquifying bronchial secretions (b) Raising the threshold of cough centre (c) Reducing cough inducing impulses from the lungs (d) Both (b) and (c)
Last Answer : Ans: D
Description : Antitussives act by: A. Liquifying bronchial secretions B. Raising the threshold of cough centre C. Reducing cough inducing impulses from the lungs D. Both ‘B’ and ‘C’ are correct
Last Answer : D. Both ‘B’ and ‘C’ are correct
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.
Last Answer : (a) cytokinin
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 of the following hormones can replace vernalisation? (a) Auxin (b) Cytokinin (c) Gibberellins (d) Ethylene
Last Answer : (c) Gibberellins
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 : 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 : 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 : 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 : Which hormone is applied to the root of a plant ?
Last Answer : Auxin hormone is applied to the root of the plant.
Description : Which hormone is found in fruits, flowers, seeds, leaves and roots ?
Last Answer : Ethylene hormone is found in fruits, flowers, seeds, leaves and roots.
Description : What is growth hormone ?
Last Answer : Ethylene is a growth hormone.
Description : Which Hormone Helps Plant Wound Healing ?
Last Answer : Gibberellin hormone helps to heal plant wounds.