Statement I: Lipases are used in detergent formulations because they help remove blood stains from the laundry.
Statement II: Bottled fruit juices bought from the market are clearer than home-made juices because they are clarified by the use of pectinases and proteases.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Only statement II is correct.
Microbes are used to make enzymes on a large scale. Each enzyme acts on one kind of substance: lipases act on fats and oils, pectinases on pectin and proteases on proteins. Their uses follow from what they break down.
Statement I: Lipases are used in detergent formulations because they help remove blood stains from the laundry. — False. Lipases are used in detergents, but they help in removing oily stains, not blood stains. A lipase breaks down fats and oils, which is why it is added to the detergent.
Statement II: Bottled fruit juices bought from the market are clearer than home-made juices because they are clarified by the use of pectinases and proteases. — True. Home-made juice looks cloudy. Bottled juice is treated with pectinases and proteases, which clarify it, so it looks clearer.
NCERT Extract:
Chemicals, Enzymes and Other Bioactive Molecules – “… 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. Streptokinase produced by the bacterium Streptococcus and modified by genetic engineering is used as a ‘clot buster’ for removing clots from the blood vessels of patients who have undergone myocardial infarction leading to heart attack.”