Match List - I with List - II.
| List - I | List - II |
|---|---|
| (A) Aspergillus niger | (I) Butyric acid |
| (B) Clostridium butylicum | (II) Acetic acid |
| (C) Saccharomyces cerevisiae | (III) Citric acid |
| (D) Acetobacter aceti | (IV) Ethanol |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(A) Aspergillus niger — this matches (III) Citric acid. A fungus used for citric acid production.
(B) Clostridium butylicum — this matches (I) Butyric acid. A bacterium used for butyric acid.
(C) Saccharomyces cerevisiae — this matches (IV) Ethanol. Brewer's yeast ferments sugar to ethanol.
(D) Acetobacter aceti — this matches (II) Acetic acid. A bacterium used for acetic acid (vinegar).
Note: A similar question was also asked in CUET (UG) 2026 on 26-05-2026 (Slot 1), on 24-05-2026 (Slot 2), on 19-05-2026 (Slot 2) and on 19-05-2026 (Slot 1), in CUET (UG) 2025 on 13-05-2025 (Slot 1), and in CUET (UG) 2023 on 11-06-2023 (Slot 3), on 30-05-2023 (Slot 1) and on 28-05-2023 (Slot 1).
NCERT Extract:
Chemicals, Enzymes and Other Bioactive Molecules – “… Examples of acid producers are Aspergillus niger (a fungus) of citric acid, Acetobacter aceti (a bacterium) of acetic acid; Clostridium butylicum (a bacterium) of butyric acid and Lactobacillus (a bacterium) of lactic acid.”
Chemicals, Enzymes and Other Bioactive Molecules – “… Yeast (Saccharomyces cerevisiae) is used for commercial production of ethanol.”