How do ripening bananas change starches into natural sugars?

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Ripening bananas turn starches into natural sugars by breaking them down as the fruit ripens.
As bananas ripen, their starches break down into sugars. This breakdown is what makes the fruit taste sweeter, and it also makes the banana softer. The soft texture and sugar content come from the same ripening process that changes the banana’s internal structure.
Starches break down during ripening into sugars
Bananas naturally undergo ripening changes in which starches are broken down into sugars. This is the key transformation that shifts the banana from less sweet to noticeably sweeter as it becomes more ripe.
The same change also makes bananas softer
Along with increased sweetness, the starch-to-sugar breakdown also makes the fruit softer. The banana’s texture becomes easier to work with as it ripens, rather than staying firm.
Softer, sugarier bananas mix more easily into batters
The ripening process not only affects taste and softness, but also influences baking readiness. Softer bananas become easier to incorporate into batters, which helps when making items like banana bread.
The sweetness level depends on how ripe the bananas are
Heavily ripened or blackened bananas are often used in banana bread recipes because they have more pronounced sweetness from the starch breakdown. However, ordinary ripe bananas can still provide sweetness, moisture, and flavour without making the loaf as intensely sweet.

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How do ripening bananas change starches into natural sugars?

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