Old/over-ripe fruits contain which substance?

Study for the Manor Preboards Module 2 Test. Use flashcards and multiple choice questions that include hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

Old/over-ripe fruits contain which substance?

Explanation:
As fruits ripen, the pectic substances in the cell wall are progressively broken down. Protopectin, the insoluble precursor found in unripe fruit, is hydrolyzed into soluble forms such as pectin and pectinic acid. In old or overripe fruit, further breakdown increases the amount of pectinic acid, a degraded form of pectin that remains soluble and contributes to the mushier texture. So, old/over-ripe fruits contain pectinic acid because it is one of the products formed as pectin is progressively degraded during ripening. The other substances are associated with different stages or roles: protopectin with unripe fruit, pectin in its broader sense, and mannuronic acid is not the typical pectic component in fruit.

As fruits ripen, the pectic substances in the cell wall are progressively broken down. Protopectin, the insoluble precursor found in unripe fruit, is hydrolyzed into soluble forms such as pectin and pectinic acid. In old or overripe fruit, further breakdown increases the amount of pectinic acid, a degraded form of pectin that remains soluble and contributes to the mushier texture. So, old/over-ripe fruits contain pectinic acid because it is one of the products formed as pectin is progressively degraded during ripening. The other substances are associated with different stages or roles: protopectin with unripe fruit, pectin in its broader sense, and mannuronic acid is not the typical pectic component in fruit.

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