Mr. X had purchased a fruit juice bottle from the market and is puzzled to see that is completely clear. It is due to
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Pectinase and Protease
Fruit juice made at home is cloudy because of pectin and proteins in it. Enzymes made by microbes are used to clarify bottled juices.
Option (1) Lipase and Pectinase — Incorrect. Pectinase is right, but lipase breaks down fats. It is used in detergents to remove oily stains.
Option (2) Amylase and Polymerase — Incorrect. Amylase breaks down starch. A polymerase builds polymers such as DNA; it plays no part in clearing juice.
Option (3) Pectinase and Protease — Correct. Pectinase breaks down pectin and protease breaks down proteins, the two things that make juice cloudy.
Option (4) Protease and Ligase — Incorrect. Protease is right, but ligase joins pieces of DNA. It is a tool of genetic engineering.
NCERT Extract:
Chemicals, Enzymes and Other Bioactive Molecules – “… Yeast (Saccharomyces cerevisiae) is used for commercial production of ethanol. Microbes are also used for production of enzymes. Lipases are used in detergent formulations and are helpful in removing oily stains from the laundry. You must have noticed that bottled fruit juices bought from the market are clearer as compared to those made at home. This is because the bottled juices are clarified by the use of pectinases and proteases.”