Microbial Acid & Enzyme Production — NEET Biology
✅ Asked in NEET 2024Match List-I with List-II: (NEET 2024) List-I: A. Aspergillus niger B. Acetobacter aceti C. Clostridium butylicum D. Lactobacillus List-II: I. Acetic Acid II. Lactic Acid III. Citric Acid IV. Butyric Acid Choose the correct answer from the options given below:
Match List-I with List-II: (NEET 2024) List-I: A. Aspergillus niger B. Acetobacter aceti C. Clostridium butylicum D. Lactobacillus List-II: I. Acetic Acid II. Lactic Acid III. Citric Acid IV. Butyric Acid Choose the correct answer from the options given below:
Match List-I with List-II: (NEET 2021) List-I: (a) Aspergillus niger (b) Acetobacter aceti (c) Clostridium butylicum (d) Lactobacillus List-II: (i) Acetic Acid (ii) Lactic Acid (iii) Citric Acid (iv) Butyric Acid Choose the correct answer from the options given below:
Match the following organisms with the products they produce. (NEET 2019)
Which of the following is wrongly matched in the given table? (NEET 2016 Phase 1)
Answer & NCERT explanation
Correct answer: C — A–III, B–I, C–IV, D–II
Without seeing the lists, this appears to be a matching question about microorganisms and their products. The correct answer A–III, B–I, C–IV, D–II suggests specific pairings of microbes with their respective products or applications in biotechnology.
Read more NCERT concept on the PYQ
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.
NTA tests students' knowledge of which specific microbes produce which industrial chemicals. The key trap: students confuse which organism produces which acid—for example, mixing up Clostridium butylicum (butyric acid) with Lactobacillus (lactic acid) or Acetobacter aceti (acetic acid). To get it right, memorize the pairs: Aspergillus niger → citric acid, Acetobacter aceti → acetic acid, Clostridium butylicum → butyric acid, and Lactobacillus → lactic acid. This concept appears repeatedly because it directly relates to practical applications of microbes in fermentation industries and food production—core themes in the Microbes in Human Welfare chapter.
What does NCERT say about Microbes are also used?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.