Match List - I with List - II.
| List - I | List - II |
|---|---|
| Microbes | Products |
| A. Lactobacillus | I. Citric acid |
| B. Aspergillus niger | II. Butyric acid |
| C. Acetobacter aceti | III. Lactic acid |
| D. Clostridium butylicum | IV. Acetic acid |
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) Lactobacillus — this matches (III) Lactic acid. These bacteria turn milk into curd by producing lactic acid.
(B) Aspergillus niger — this matches (I) Citric acid. A fungus used for citric acid production.
(C) Acetobacter aceti — this matches (IV) Acetic acid. A bacterium used for acetic acid (vinegar).
(D) Clostridium butylicum — this matches (II) Butyric acid. A bacterium used for butyric acid.
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.”