List of top Environmental Microbiology Questions asked in GATE ES

A common effluent treatment plant with a capacity of 2 million litres per day (MLD) employs reverse osmosis (RO) for water reuse. The RO unit removes 95% of the total dissolved solids (TDS) and the water recovery rate is 70%. If the TDS concentration in the RO feed is 8000 parts per million (ppm), the TDS in the RO reject is ________ g/L. (rounded off to one decimal place)
Choose the correct option(s) for removing solids from water.
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:

Choose the correct statement(s) from the following regarding the structure/reproduction of microorganisms:
Which one of the following is performed by autotrophic bacteria?
Rod shaped bacterial cells are called _______.
Tuberculosis is predominantly caused by ________.
Enzymes with the class of enzymes are listed in the table. Enzyme Class of Enzyme
Enzymesclass of enzymes
(a) Lactate dehydrogenase(i) Isomerases
(b) Alanine racemase(ii) Transferases
(c) Lipase(iii) Oxidoreductases
(d) Hexokinase(iv) Hydrolases

Select the correct match(es)
With reference to disinfection, which of the following statement(s) is/are CORRECT?
Which of the following statement(s) is/are CORRECT?