THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ethylene is a simple gaseous molecule which makes it easy for receptors to detect
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Fruit will ripen in closed container without air
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Ethylene synthesis is under both positive and negative feedback mechanisms
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Loss of function mutations in the ethylene receptors changes the fruit ripening process
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Detailed explanation-1: -Which of the following best supports the claim that ethylene initiates the signal transduction pathway that leads to ripening of fruit? Loss-of-function mutations in ethylene receptors result in changes to the ripening process.
Detailed explanation-2: -Ethylene causes fruit to ripen. In a signaling pathway, receptors activate transcription factors, which ultimately leads to ripening.
Detailed explanation-3: -The ethylene signal transduction pathway has been extensively studied, in part because ethylene affects so many traits related to plant vigor and post-harvest physiology and storage. Once biosynthesized, ethylene diffuses throughout the plant and binds to ethylene receptors to stimulate ethylene responses.
Detailed explanation-4: -The production of ethylene in climacteric fruits is also known as autocatalytic, which means an initial concentration of ethylene causes an increase in production of ethylene. This means once ethylene production starts, the fruit naturally increases the amount of signal made accelerating ripening.