MCQ on Plant Hormones (Plant Physiology MCQ-03) Lecture Notes MCQ Biology Welcome to Plant Physiology MCQ 03 Plant Physiology Quiz on Plant Hormones This question set on Plant Physiology MCQ-03: Plant Hormones / Phytohormones consists of 15 questions in MCQ format. Please select the correct answer and at the end of the test, you have to click on 'SUBMIT' button to see your Score and the Correct Answers. Please click 'NEXT' button to start the quiz... 1. Among the following which hormone can induce flowering in short day plants grown under long duration of light? Gibberelic acid Abscisic acid Auxins Cytokinin 2. The factor responsible for the formation of early embryonic axis during early developmental pathway of plants is: Orientation of embryo sac Plane of Cell Division Auxin gradient Morphogens3. Parthenocarpic tomato fruits can be produced by: Removing androecium of flowers before pollen grains are released Treating the plants with phenylmercuric acetate Raising the plants from vernalized seeds Treating the plants with low concentrations of gibberellic acid and auxins4. The “Foolish Seedling” disease of rice led to the discovery of: IAA ABA GA 2, 4 – D5. Aspirin delays senescence in cut parts of the plant and keeps flower fresh for longer time. The effect of aspirin is By increasing the synthesis of cytokinins By increasing the synthesis of gibberellic acid By increasing the synthesis of abscisic acid By decreasing the synthesis of ethylene6. Gibberellic acid stimulates seed germination in monocots by the activation of digestive enzymes by acting on: Aleurone layer Cotyledons Embryo Endosperm7. Treatment of seed at low temperature under moist conditions to break its dormancy is called: Vernalization Chelation Scarification Stratification8. Among the following which is NOT involved in the plant defence signaling pathway? Ethylene Salicylic acid Jasmonic acid Gibberelic acid 9. Which one of the following is NOT a plant hormone? Jasmonates Polyamines Nitric oxide Brassinosteroid10. A tryptophan auxotroph in corn showed 50 times more accumulation of IAA than the normal. The probable explanation for this is: There may be some other precursors for IAA synthesis IAA was not oxidized IAA is probably not inhibited by the feedback mechanism De-conjugation of ester linked IAA does not take place11. Abscisic acid can be degraded by: Oxidation and conjugation Oxidation and reduction Light and oxidation Reduction and conjugation12. How does pruning help in making the hedge dense? It frees axillary buds from apical dominance It induces the differentiation of new shoots from the rootstock The apical shoot grows faster after pruning It releases wound hormones13. Agrobacterium tumefaciens causes crown gall diseases in dicot plants. Which phytohormone genes are present on T‐DNA? Auxin and cytokinin Auxin only Cytokinin only Cytokinin and brassinosteroids14. For the flower induction, the vernalization signal in plants is perceived mainly by: Shoot apical meristem Mature leaves near the root shoot junction Young leaves subtending the apical meristem All vegetative parts15. In tissue culture experiment to initiated shoots from the undifferentiated mass of cell the medium must contain: Low auxin and high cytokinin High auxin and high cytokinin Low auxin and low cytokinin High auxin and low cytokininYou have reached at the End of this Quiz. Please Click 'SUBMIT' button to see your Score and the Correct Answers... Get our Updates on PLANT PHYSIOLOGY in your E-mail Inbox We will not spam your account… Enter your e-mail address Don’t forget to Activate your Subscription…. 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