GATE General Biology: Microbiology: Microbial growth and nutrition, operons (lac, trp, ara), nitrogen fixation – Previous Year Questions

4 GATE previous year questions on Microbiology: Microbial growth and nutrition, operons (lac, trp, ara), nitrogen fixation (General Biology, Biotechnology) with answers and explanations, from every paper.

1. GATE 2022 BT Q51 (2 marks, Multiple select) – Which of the following statement(s) is(are) CORRECT regarding the lac operon in E. coli when grown in the presence of glucose and lactose?
2. GATE 2023 BT Q19 (1 mark, Multiple choice) – Which one of the following statements is TRUE about leghemoglobin?
3. GATE 2026 BT Q17 (1 mark, Multiple choice) – In nitrogen fixation, to reduce nitrogen to ammonia, which one of the following shows the correct order of electron flow?
4. GATE 2025 BT Q36 (2 marks, Multiple choice) – Correctly match the Microorganisms with their respective Nutrition and energy requirement. Microorganisms Nutrition and energy requirement --- --- P.…