Description : Phototropic and geotropic movements are linked to (a) gibberellins (b) enzymes (c) auxin (d) cytokinins.
Last Answer : (c) auxin
Description : Phototropic curvature is the result of uneven distribution of (a) gibberellin (b) phytochrome (c) cytokinins (d) auxin.
Last Answer : (d) auxin.
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 : 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 : 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, 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 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 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 : 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 : How long does it usually take for the roots of the crop to rot well in the soil ?
Last Answer : It usually takes 10 to 15 days for the roots of the crop to mix well with the decomposed soil .
Description : Mycorrhiza is associated with what part of plants? (A) Roots (B) Leaf (C) Stem (D) Fruits
Last Answer : (A) Roots
Description : Plant Parasitic Nematode Feed on the of the Plant? A. Leaves B. Stem C. Fruits D. Roots
Last Answer : D. Roots
Description : The symptoms of powdery mildew of pea (caused by Erysiphe polygoni) first appears on (a) Stem (b) Roots (c) Leaves (d) Flowers
Last Answer : (c) Leaves
Description : How does the supply of nitrogen in grains take place? (a) From old leaves (b) From plant roots (c) From stem (d) By photosynthesis
Last Answer : (a) From old leaves
Description : Groundnut pegs when developed in the soil from – a) Tubers b) Fruits c) Stems d) Roots
Last Answer : b) Fruits
Description : Clostridium welchii spore formation can be induced only on specified media such as a. Wilson-Blair medium b. Macconkey medium c. Ellner medium d. Thayee-Martion medium
Last Answer : Ans: C
Description : The wild type E.coli cells are growing in normal medium with glucose. They are transferred to a medium containing only lactose as sugar. Which of the following changes take place? (a) The lac operon is ... ) E.coli cells stop dividing. (c) The lac operon is repressed. (d) All operons are induced.
Last Answer : (a) The lac operon is induced
Description : Callus is a. Tissue that forms embryo b. An insoluble carbohydrate c. Tissue that grows to form embryoid d. Unorganized actively dividing mass of cells maintained in cultured
Last Answer : d. Unorganized actively dividing mass of cells maintained in cultured
Description : Who discovered cytokinins? -Biology
Last Answer : answer:
Description : Commercial applications of cytokinins -Biology
Description : Which of the following statements are true? 1. Cytokinins promote stomatal opening 2. Sprays of indole -3 acetic acid can inhibit premature fruit fall 3. The growth movements caused by a unilateral stimulus are known as nastic movements 4. The ... 4 (b) 2 and 4 (c) 1, 2, and 4 (d) 1, 2, 3, and 4
Last Answer : Ans:(a)
Description : Many _________ in super optimal concentrations also act as growth inhibitors : a. Auxins b. Gibberellins c. Cytokinins d. All of above
Last Answer : Auxins
Description : Plants, protein, RNA, DNA contents are increased by a. Auxins b. Adenine c. Cytokinins d. None of above
Last Answer : Cytokinins
Description : Hormones which control apical dominance are: a. Auxins b. Cytokinins c. Gibberellins d. Polyamines
Description : Leaf fall can be prevented with the help of (a) abscisic acid (b) auxins (c) florigen (d) cytokinins.
Last Answer : (d) cytokinins.
Description : Cytokinins (a) promote abscission (b) influence water movement (c) help retain chlorophyll (d) inhibit protoplasmic streaming.
Last Answer : (c) help retain chlorophyll
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 : Fruit and leaf drop at early stages can be prevented by the application of (a) ethylene (b) auxins (c) gibberellic acid (d) cytokinins.
Last Answer : (b) auxins
Description : Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum ... yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid
Last Answer : (a) Application of iron and magnesium to promote synthesis of chlorophyll
Description : Fruit and leaf drop at early stages can be prevented by the application of: (1) Ethylene (2) Auxins (3) Gibberellic acid (4) Cytokinins
Last Answer : (2) Auxins
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 : In medium term storage, material can be stored up to – a) 100 years b) 3 to 5 years c) 10 to 15 years d) None of these
Last Answer : b) 3 to 5 years
Description : Do you still have a callus next to the index finger of your writing hand?
Last Answer : Later more on the calluses, but first this: Yesterday I wrote an instruction on how to use certain buttons on a dumb' phone, for my father. It was on a paper with a photo of the phone keyboard on ... , from holding brushes, when I was a house painter. The index finger even had a slight bow in it.
Description : Is a callus made of scar tissue?
Last Answer : calluses are hardened pads of dead skin tissue, not scar tissue. carefully peeling or grinding down a callus will reveal ordinary (but sensitive) skin beneath, whereas scar tissue grows in place of skin. you can’t remove a scar and reveal good skin beneath.
Description : Callus/blister with clear liquid inside?
Last Answer : don’t drain it. You are not suppose to pop blisters. Popping it allows infection to the site.
Description : What is callus? -Biology
Description : How the root induction can be done during the callus culture? -Biology
Description : What is callus culture? -Biology
Description : Which cell of phloem accumulates callus in winter ?
Last Answer : : Calcium accumulates in the sival cells of phloem in winter.
Description : Differentiation of callus into plant parts is
Last Answer : Differentiation of callus into plant parts is A. Embryogenis B. Embryoid fomation C. Morphogensis D. Totipotency
Description : A process of formation of somatic embryos from callus
Last Answer : Ans. Embryogenesis
Description : Thickening of the epidermis and/or dermis A. Callus B. Lichenification C. Scaling D. Lacking in sensitive people
Last Answer : Ans: B
Description : Which skin neoplasm is associated with an increase in the growth of cells in the keratin layer of the epidermis caused by pressure or friction? A. callus B. keloid C. keratosis D. leukoplakia
Last Answer : Ans: A
Description : Which one of the following is a case of wrong matching? (a) Somatic – Fusion of two hybridization diverse cells (b) Vector DNA – Site for tRNA synthesis (c) Micropropagation – In vitro production of plants in large numbers (d) Callus – Unorganised mass of cells produced in tissue culture
Last Answer : (b) Vector DNA – Site for tRNA synthesis
Description : Callus is a term usually referring to: a. The tissue on the collar of a limb b. The first tissue develops on a cut surface just before the root formation iniates. c. Deformed growth on plant limbs d. A disease of plant leaves and limbs
Last Answer : The first tissue develops on a cut surface just before the root formation iniates
Description : For union between stock and scion in grafting which one is the first to occur? (a) Formation of callus (b) Production of plasmodesmata (c) Differentiation of new vascular tissues (d) Regeneration of cortex and epidermis
Last Answer : (a) Formation of callus