Which of the following enzymes are used to clarify the packed juices?
(A) Pectinases
(B) Kinases
(C) Proteases
(D) Nucleases
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A) and (C) only
(A) Pectinases Correct. Pectin is a substance of the plant cell wall that makes juice thick and cloudy. Pectinases break down pectin, so the juice becomes clear.
(B) Kinases Incorrect. Kinases are enzymes that add phosphate groups to other molecules inside cells. They play no part in clarifying juices.
(C) Proteases Correct. Proteases break down proteins that make the juice hazy. Pectinases and proteases are used together to clarify bottled juices.
(D) Nucleases Incorrect. Nucleases cut nucleic acids (DNA and RNA). Restriction enzymes are nucleases used in genetic engineering, not in juice making.
Note: A similar question was also asked in CUET (UG) 2022 on 23-08-2022 (Slot 3).
NCERT Extract:
Chemicals, Enzymes and Other Bioactive Molecules – …
