Tag: CSIR NET Life Science Previous Year Questions and Solution Plant Hormones

Which or the following factors is known to be involved Postponing programmed cell death in cereal aleuroneuntil endosperm mobilization is complete? (1) Gibberellic acid (2) Abscisic acid (3) Acidic pH […]

Which one of the following statements about phytohormone ABA is correct? (1) High level of ABA predominantly promotes vivipary. (2) ABA-Beeta-D-glucosyl ester is an active form of ABA. (3) Inactivation […]

Following are certain facts about the effect of abscisic acid (ABA) on the development and physiological effect of plants: A. ABA promotes leaf senescence independent of ethylene B. ABA promotes […]

49. A plant hormone that promotes the acquisition of desiccation tolerance in developing seed is (1) ABA        (2) Ethylene (3) IAA         (4) GA3. Correct answer: (1) ABA (Abscisic Acid) Explanation: […]

Abscisic acid can be degraded by (1) Oxidation and reduction (2) Reduction and conjugation (3) Oxidation and conjugation (4) Light and reduction Correct answer: (3) Oxidation and conjugation Explanation: Abscisic […]

Which of the following DONOT occur during seed development? (1) Accumulation of storage proteins (2) Synthesis of LEA proteins (3) Desiccation (4) Synthesis of Gibberellic acid Correct answer: (4) Synthesis […]

46. A protein especially abundant in desiccated seeds and also help in osmotic adjustment (1) LEA                 (2) HSP (3) Globin             (4) alpha-amylase Correct answer: (1) LEA Explanation: LEA (Late Embryogenesis […]

45. Which hormone     induces formation of Late Embryogenesis Abundant (LEA) protein during seed maturation? (1) Gibberellic acid            (2) Ethylene (3) Abscisic acid                   (4) Cytokinin Correct answer: (3) Abscisic acid Explanation: […]

44. The phytohormone responsible for deposition of storage reserves, prevention of precocious germination, acquisition of desiccation tolerance, and induction of primary dormancy in seeds is (1) Gibberlic Acid               (2) Ethylene […]

Which hormone is responsible for opening and closing of stomata? (1) ABA              (2) IAA (3) Cytokinin    (4) Ethylene Correct answer: (1) Abscisic acid […]