Do non ripen bananas quicker next to rip bananas?

Yes, non-ripe bananas will ripen quicker if placed next to ripe bananas. This is because ripe bananas release ethylene gas, a natural plant hormone that plays a role in ripening fruits. When unripe bananas are exposed to ethylene gas, they absorb it and begin to ripen more quickly. The ethylene gas causes the starch in the bananas to convert into sugars, making them softer and sweeter.