MCQs on Food Microbiology 1. Which of the following produces citric acid? (a) Aspergillus (b) Pseudomonas (c) Saccharomyces (d) Clostridium Sol: (a) Aspergillus. 2. Which of the following organism is nitrogen-fixing and found in rice fields in symbiotic association with Azolla? (a) Frankia (b) Tolypothrix (c) Spirulina (d) Anabaena Sol: …