Some fruits can be ripened by placing them in a plastic bag with a ripe banana. Ripe banana releases ethylene which ripens all the other raw fruits.
True
Ethylene is a phytohormone responsible for ripening of fruits, sprouting of potato tuber and induction of flowering in mangoes. Ripe fruits produce ethylene. So, if a ripe fruit is kept amidst a bunch of raw fruits, ethylene released helps in ripening of all other raw fruits with it.