Question

Which prokaryotic organism is frequently used in laboratories for testing the given phenomenon?

• A. Amoeba
• B. Paramecium
• C. Escherichia coli
• D. Agrobacterium tumefaciens

Answer 1

The correct option is C Escherichia coli

The biochemical oxygen demand (BOD) test is a crucial environmental index for monitoring organic pollutants in wastewater. Micro-organisms involved in biodegradation of organic matter in the receiving water body consume a lot of oxygen, and as a result there is a sharp decline in dissolved oxygen downstream from the point of sewage discharge. This causes mortality of fish and other aquatic creatures. The test for biochemical oxygen demand (BOD) is a bioassay procedure that measures the oxygen consumed by E.Coli bacteria from the decomposition of organic matter. The change in dissolved oxygen concentration is measured over a given period of time in water samples at a specified temperature.