Raw banana has bitter taste, while ripe banana has sweet taste. It happen because of the conversion of
A. Starch to sugar
B. Sucrose to fructose
C. Amino acids to sugar
D. Amino acids to protein

Hint:-There are two types of bananas – raw (unripe) and ripe, both having some differences in the chemical composition from each other. Raw bananas appear green and waxy while the ripe bananas are yellow in colour.

Complete Answer:-
Unripe banana contains almost 40% starch and has a low glycemic index making it take longer to get digested. They appear green because their peels contain chlorophyll. As they are raw, they are much harder as compared to ripe bananas. They are firm and bitter in taste. They have high resistant starch content while the sugar content is low. They contain probiotic bacteria that help in maintaining good colon health. They also help in absorbing nutrients such as calcium.
A ripe banana is softer than a raw banana. They appear yellow because the peel loses its chlorophyll content. As the banana ripens, it becomes sweeter and its flavor also increases. Ripe bananas contain only 8% starch and 91% sugar. Their glycemic content is high thus is easy to digest. They also have a higher level of antioxidants. The ripe bananas are sweeter than the raw bananas because in ripe bananas the resistant starch gets converted into simple sugars.

Thus the correct option is (A) Starch to sugar.

Note:- Bananas are very beneficial for our health. Ripe bananas produce a chemical substance known as Tumor Necrosis Factor or TNF which gives the ripened bananas anti-cancerous properties. It fights with the abnormal cells of the body. Thus it is very helpful in building the immunity of the body.