Ethylene causes fruits to ripen. In a signaling pathway, receptors activate transcription factors, which ultimately leads to ripening. Which of the following best supports the claim that ethylene initiates the signal transduction pathway that leads to ripening of fruit?A) Ethylene is a simple gaseous molecule, which makes it easily detected by receptors.B) Fruit will ripen in closed containers without exposure to air.C) Ethylene synthesis is under both positive and negative feedback regulationD) Loss-of-function mutations in ethylene receptors result in changes to the ripening process.

The process that initiates the ripening of some fruits is initially caused by the elimination of the gas ethylene, which is one of plants hormones that can act as growth regulators. Ethylene is the responsible to activate a transduction pathway after it goes on the membrane of the cells and reaches its receptors, causing the transcription of ethylene responsive genes, and therefore ripening. Loss-of-function mutations on those receptors of the ethylene molecule will end the activation of transcription of those responsive genes, because without the functioning receptor, ethylene cannot interact, so the ripening won't happen.

kasliwalalvi24 kasliwalalvi24 · Answer 2 · 2021-10-08T12:47:53+02:00

Answer:

The statement that supports the claim that ethylene initiates the signal transduction pathway that leads to ripening of fruit is

D. Loss-of-function mutations in ethylene receptors result in changes to the ripening process.

Explanation:

Ethylene is a gaseous molecule, which activate transcription factors leading to fruit ripening. Loss-of-function mutations have impact on regulatory pathways, or cycles, which can affect important processes such as cell differentiation, proliferation, and cell death. Ethylene plays a crucial role in ripening, as the molecule binds to the transcription factors and activates them. Ethylene initiates the process by activating the signal transduction pathway. Thus, if the loss-of-function mutations in ethylene receptors will occur, it may have dramatic effect on the fruit ripening process.

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