Home › Previous year questions › GATE 2026 BT › Question 24GATE 2026 BT – Question 24 Plant, Animal and Microbial Biotechnology · Microbes: Production of biomass and metabolites, biofuels, bioplastics, enzymes, antibiotics, recombinant proteins, clinical, food and industrial microbiology · 1 mark · Multiple choice
The correct sequence of the four steps involved in anaerobic production of biogas from complex organics is:
Hydrolysis $\rightarrow$ Acidogenesis $\rightarrow$ Acetogenesis $\rightarrow$ Methanogenesis Methanogenesis $\rightarrow$ Acetogenesis $\rightarrow$ Acidogenesis $\rightarrow$ Hydrolysis Acidogenesis $\rightarrow$ Hydrolysis $\rightarrow$ Methanogenesis $\rightarrow$ Acetogenesis Hydrolysis $\rightarrow$ Methanogenesis $\rightarrow$ Acidogenesis $\rightarrow$ Acetogenesis Practise this question in The GATE Grind →
Show answer and explanation Correct answer: (A) Hydrolysis $\rightarrow$ Acidogenesis $\rightarrow$ Acetogenesis $\rightarrow$ Methanogenesis
Explanation Polymers are first hydrolysed to monomers, the monomers are fermented to volatile fatty acids (acidogenesis), these are converted to acetate, hydrogen and $CO_2$ (acetogenesis), and methanogens finally make methane.