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Ethylene - Basic

Dear Readers,

Ethylene is regarded as a multifunctional phytohormone that regulates both growth, and senescence. It promotes or inhibits growth and senescence processes depending on its concentration, timing of application, and the plant species.

Q1.  Ripening of banana is accompanied with

  •  Sudden rise in cytokinin
  •  Sudden rise in auxin
  •  Sudden rise in ethylene
  •  Sudden rise in gibberellin

Sudden rise in ethylene

Q2.  Recognition of ethylene as a natural plant hormone was done by

  •  Haberlandt
  •  Pratt Goeschi
  •  Richmond Lang
  •  Sorokin

Pratt Goeschi

Q3.  Ethylene gas

  •  Is a saturated hydrocarbon
  •  Slows down the ripening of apples
  •  Retards ripening of tomatoes
  •  Speeds up maturation of fruits and early ripening of some fruits

Speeds up maturation of fruits and early ripening of some fruits

Q4.  Ethylene increases

  •   Respiration
  •   Climactric temperature
  •  Photosynthesis
  •  Transpiration

Climactric temperature

Q5.  Highest proportion of ethylene is found in

  •  Fresh potato tuber
  •  Green apple
  •  Green banana
  •  Ripened banana

Ripened banana

Q6.  Ethylene is a

  •  Gaseous hormone
  •   Gaseous enzyme
  •   Liquid-gas mixture
  •  Solid hormone

Gaseous hormone

Q7.  Unripened fruits are bitter in taste because of

  •  Sugars
  •  Proteins
  •  Acids
  •  Tannins

Acids

Q8.  Artificial ripening of fruits is accomplished by treatment with

  •  Sodium chloride
  •   IAA
  •   Ethylene gas
  •   Kinetin

Kinetin



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