LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOTECHNOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What process uses bacteria to eat away at unwanted iron and minerals, leaving the valuable silver, copper and gold behind?
A
Fermentation
B
Bioremediation
C
Biomining
D
Composting
Explanation: 

Detailed explanation-1: -Microbial ore leaching (bioleaching) is the process of extracting metals from ores with the use of microorganisms. This method is used to recover many different precious metals like copper, lead, zinc, gold, silver, and nickel.

Detailed explanation-2: -Among the chemoautotrophic bacteria Acidithiobacillus ferrooxidans, Leptospirillum ferrooxidans and Acidithiobacillus thiooxidans are most exploited bacteria for biomining.

Detailed explanation-3: -Biomining is the process of using microorganisms (microbes) to extract metals of economic interest from rock ores or mine waste. Biomining techniques may also be used to clean up sites that have been polluted with metals. Valuable metals are commonly bound up in solid minerals.

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