Match List-I with List-II:
| List-I | List-II |
|---|---|
| Microbes | Acid Produced |
| (A) Aspergillus | (I) Lactic acid |
| (B) Acetobacter | (II) Butyric acid |
| (C) Clostridium | (III) Acetic acid |
| (D) Lactobacillus | (IV) Citric acid |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
(A) Aspergillus — this matches (IV) Citric acid. Aspergillus niger is a fungus used commercially to make citric acid.
(B) Acetobacter — this matches (III) Acetic acid. Acetobacter aceti is a bacterium that makes acetic acid, the acid of vinegar.
(C) Clostridium — this matches (II) Butyric acid. Clostridium butylicum is a bacterium that produces butyric acid.
(D) Lactobacillus — this matches (I) Lactic acid. Lactobacillus is a lactic acid bacterium. The lactic acid it makes is what sets milk into curd.
Note: A similar question was also asked in CUET (UG) 2026 on 26-05-2026 (Slot 1), on 24-05-2026 (Slot 2) and on 19-05-2026 (Slot 2), in CUET (UG) 2025 on 13-05-2025 (Slot 1), and in CUET (UG) 2023 on 28-05-2023 (Slot 1).
NCERT Extract:
Chemicals, Enzymes and other Bioactive Molecules – “Microbes are also used for commercial and industrial production of certain chemicals like organic acids, alcohols and enzymes. 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.”