Description : ABA is involved in (a) shoot elongation (b) increased cell division (c) dormancy of seeds (d) root elongation.
Last Answer : (d) root elongation.
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 : Gibberellins promote (a) seed germination (b) seed dormancy (c) leaf fall (d) root elongation.
Last Answer : (c) leaf fall
Description : Abscisic acid causes (a) stomatal closure (b) stem elongation (c) leaf expansion (d) root elongation.
Last Answer : (a) stomatal closure
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 : Leaf fall can be prevented with the help of (a) abscisic acid (b) auxins (c) florigen (d) cytokinins.
Last Answer : (d) cytokinins.
Description : Which of the following plant hormones are incorrectly paired? (1) abscisic acid- transpiration (2) auxins- apical dominance (3) cytoldnins- senescence (4) gibberlins- bud and seed dormancy
Last Answer : (4) gibberlins- bud and seed dormancy Explanation: Abscisic acid is responsible for responsible for dormancy of various types. It maintains dormancy in seeds and buds, stimulates the closing of stomata. Gibberellins are responsible for cell division and growth in cell size.
Description : Seed dormancy is regulatedby – (1) Abscisic acid (2) Gibberellic acid (3) Indole acetic acid (4) Ethylene
Last Answer : (1) Abscisic acid Explanation: The transition from dormancy to germination in seeds is a key physiological process during the lifecycle of plants. Abscisic acid (ABA) is the sole plant ... acts through a gene expression network involving the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3).
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 is not an inhibitory substance governing seed dormancy? (a) Gibberellic acid (b) Abscisic acid (c) Phenolic acid (d) Para-ascorbic acid
Last Answer : a) Gibberellic acid
Description : Which of the following plant hormones are incorrectly paired? (1) abscisic acid- transpiration (2) auxins-apical dominance (3) cytokinins- senescence (4) gibberlins- bud and seed dormancy
Last Answer : gibberlins- bud and seed dormancy
Description : Seed dormancy is regulatedby (1) Abscisic acid (2) Gibberellic acid (3) Indole acetic acid (4) Ethylene
Last Answer : Abscisic acid
Description : Colchicines bring about: (a) Polyploidy (b) Cell division (c) Cell elongation (d) Cell differentiation
Last Answer : Ans. ((a))
Description : Growth retardants are the substances which slow down : a. Cell division b. Cell elongation c. a & b d. None of the above
Last Answer : a & b
Description : What is the direct cause of cell death by diphtheria toxin? A- Formation of an ion channel in the cell membrane B- Inactivation of a translational elongation factor C- Induction of apoptosis D- None of the above
Last Answer : Inactivation of a translational elongation factor
Description : Organisation of stem apex into corpus and tunica is determined mainly by (a) planes of cell division (b) regions of meristematic activity (c) rate of cell growth (d) rate of shoot tip growth.
Last Answer : (a) planes of cell division
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 : Megaspores are produced from the megaspore mother cells after (a) mitotic division (b) formation of thick wall (c) differentiation (d) meiotic division.
Last Answer : d) meiotic division.
Description : What factor controls and regulate cell division?
Last Answer : There are several factors that control and regulate celldivision. They are CDKs, or cyclin depending protein kinases.Cyclins are a class of regulatory proteins in the cell.
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 : 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 : The length of different internodes in a culm of sugarcane is variable because of (a) size of leaf lamina at the node below each internode (b) intercalary meristem (c) shoot apical meristem (d) position of axillary buds.
Last Answer : (b) intercalary meristem
Description : The formation of a peptide bond during the elongation step of protein synthesis results in the splitting of how many high energy bonds? (A) 1 (B) 2 (C) 3 (D) 4
Last Answer : Answer : B
Description : Removal of apical bud results in (a) formation of new apical bud (b) elongation of main stem (c) death of plant (d) formation of lateral branching.
Last Answer : d) formation of lateral branching.
Description : What is the correct sequence of events A. Differentiation of odontoblast, elongation of enamel epithelium, dentine formation then enamel formation. B. Differentiation of odontoblast, ... Elongation of enamel epithelium, differentiation of odontoblast, dentine formation then enamel formation.
Last Answer : C. Elongation of enamel epithelium, differentiation of odontoblast, dentine formation then enamel formation.
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 : What is the role of Abscisic acid? -Biology
Last Answer : answer:
Description : What is abscisic acid? -Biology
Description : What is the function of abscisic acid? -Biology
Description : Why is abscisic acid also known as stress hormone? -Biology
Description : Where is abscisic acid produced? -Biology
Description : What is ABA (Abscisic acid)? -Biology
Description : What are the functions of Abscisic acid? -Biology
Description : What type of osmotic environment was present to bring about the abscisic acid trigger?
Last Answer : Need answer
Description : Abscisic acid is synthesized from
Last Answer : Ans. Actively growing points
Description : The plant hormone abscisic acid is also known as......?
Last Answer : Stress hormon
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 : 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 : The hormone produced during adverse environmental conditions is (a) benzyl aminopurine (b) bichlorophenoxy acetic acid (c) ethylene (d) abscisic acid
Last Answer : (d) abscisic acid
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 : 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 : 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 : Which one of the following acids is a derivative of carotenoids? (a) Indole-3-acetic acid (b) Gibberellic acid (c) Abscisic acid (d) Indole butyric acid
Last Answer : (c) Abscisic acid
Description : Root development is promoted by (a) abscisic acid (b) auxin (c) gibberellin (d) ethylene
Last Answer : (d) ethylene.
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.