Question:

Which one of the following pairs is not correctly matched

Updated On: Oct 13, 2023

Serratia – Drug addiction
Spirulina – Single cell protein
Rhizobium – Biofertilizer
Streptomyces – Antibiotic

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The Correct Option is A

Solution and Explanation

Serratia is a genus of bacteria, and it is not associated with drug addiction. The other pairs are correctly matched: (B) Spirulina is known for its use as a source of single-cell protein. (C) Rhizobium is commonly used as a biofertilizer because it forms a symbiotic relationship with leguminous plants and helps fix nitrogen from the atmosphere. (D) Streptomyces is a well-known genus of bacteria that produces antibiotics. So, the correct option is (A): Serratia – Drug addiction

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Concepts Used:

General Principles and Processes of Isolation of Elements

What are Ores and Minerals?

Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.

Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.

Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –

Concentration of the ore
Isolation of the metal from its concentrated ore
Purification of the metal