Question

Reena studied in a health magazine that intake of fruit and fresh fruit juices is good for skin and body. She immediately went into the kitchen, picked some fruits and extracted the juice out of them using a juicer. She observed that the homemade juice was not as clear as the bottled juices she purchased from the supermarket. What could be the possible reason for this?

• A. She didn't peel the skin off the fruits properly
• B. The juicer was not working and could not filter the juice properly
• C. Homemade juices are not treated with pectinase and proteases
• D. Fruits used for making the juice were rotten

Answer 1

The correct option is C Homemade juices are not treated with pectinase and proteases

The fruits have fibres which are present in the juice extracted from them. This will persist even if the fruits are peeled properly and juiced well. If the juice is extracted from rotten fruits, the fibres will still be present and it might even smell bad.

These fibres are the cell wall of the fruits that are made up of cellulose, hemicellulose, pectin, proteins, etc.
The bottled juice products purchased from markets are treated with enzymes such as pectinases and proteases to break the cell wall components of the fruits and increase the yield i.e the juice extracted from each fruit and also make the juice appear clearer.