List of top Environmental Microbiology Questions on Microbial diversity asked in GATE ES

If microbial growth occurs under substrate unlimited conditions, according to Monod’s kinetics, choose the correct option(s) from the following:

Consider the following statements on microbial metabolism: 
(i) Utilization of carbon for cell synthesis is termed as anabolism. 
(ii) During catabolism, adenosine triphosphate (ATP) is converted into adenosine diphosphate (ADP). 
Choose the correct option from the following:

Read the following statements:
(i) Aerobic heterotrophic bacteria use organic matter for carbon source and energy source.
(ii) Aerobic heterotrophic bacteria use carbon dioxide for carbon source and energy source.
(iii) Aerobic autotrophic bacteria use carbon dioxide for carbon source and reduced substances for energy source.
(iv) Aerobic autotrophic bacteria use organic matter for getting energy.
The correct choice is:
A typical plasmid-free bacterial cell having a single chromosome consists of $\sim 55%$ protein, $\sim 3%$ DNA and $\sim 21%$ RNA (percent of dry weight). Assuming there are 2500 different types of protein molecules (with at least one copy number) being expressed in a bacterial cell at any given time, which of the following statements is/are NOT correct with respect to the number of intracellular DNA, RNA and protein molecules?
Ten litres of the sample was filtered through a membrane filter and the filter was transferred to solid agar media which supports growth of coliform organisms. After incubation at 37°C for 48 hours, the agar plates showed an average of 64 colonies per plate. What was the average concentration of coliform organisms (in CFU/ml) in the original water sample?