Question

When an unripe banana is sealed in a polythene bag, it remains green for many days. But if an apple is also sealed in the same bag the banana ripens and turns yellow within a few day. The reason is that apple

• A. Remove $O_2$ released by the banana and thus promotes ripening
• B. Produces $C{O}_2$ which promotes ripening
• C. Removes $C{O}_2$ which inhibits ripening
• D. Releases ethylene which promotes ripening

Answer 1

The correct option is D Releases ethylene which promotes ripening

Ethylene is the gas, which promotes ripening of fruits, because it acts on the walls of fruits (pectin cell wall) and makes it soft. Ethylene is responsible for the changes in texture, softening, color, and other processes involved in ripening. Thus ensures the easy ripening. Ethylene is the gas used by shopkeepers to make the fruits to ripen. Apples and pears are examples of fruit that produce ethylene with ripening. Thus, when raw banana is packed with ripe apple it ripens and turns yellow within a few days.

So, the correct answer is 'Releases ethylene which promotes ripening'