Correct answer: (1) A and H

In this question, you have to pick the enzyme–microorganism pair(s) that correctly match important industrial enzymes with their microbial sources.

Given pairs:

• A. Amylase

• B. Asparaginase

• C. Lipase

• D. Pectinase

• E. Azotobacter vinelandii

• F. Serratia marcescens

• G. Aspergillus aureus

• H. Aspergillus oryzae

The options present pairs like “A and H”, “B and G” etc., and you must choose which pair is correct.

Why A and H is correct:

• Amylase is a major industrial enzyme used in starch processing, syrups, baking, brewing and detergents.

• Fungal α‑amylase for commercial use is classically produced from Aspergillus species, especially Aspergillus oryzae, which secretes large amounts of extracellular amylases used in food and biotech industries.​

• Therefore, the pair “Amylase – Aspergillus oryzae” (A and H) is correct.

Why other suggested pairs are not correct in this list:

• B and G (Asparaginase – Aspergillus aureus)

  • Clinically used L‑asparaginase (for leukemia treatment) is mainly from bacteria such as Escherichia coli and Erwinia chrysanthemi, not from “Aspergillus aureus” (which is not a standard industrial source).

• C and E (Lipase – Azotobacter vinelandii)

  • Azotobacter vinelandii is known for nitrogen fixation and biopolymer (e.g., PHB) production, not as the main industrial lipase producer. Industrial lipases typically come from Candida, Rhizopus, Pseudomonas, etc.

• D and F (Pectinase – Serratia marcescens)

  • Industrial pectinases used for juice clarification and fruit processing are mainly produced by fungi such as Aspergillus niger and Aspergillus oryzae, not typically from Serratia marcescens.​

So only the pair A–H (Amylase from Aspergillus oryzae) is clearly correct among the options.