Denitrification Is the

question 54

Multiple Choice

Denitrification is the

• A) conversion of nitrate or nitrite to N₂ by anaerobic respirers.
• B) oxidation of NH₄⁺ to nitrate or nitrite by lithotrophs.
• C) conversion of N₂ to NH₄⁺.
• D) removal of nitro groups from organic molecules.
• E) removal of amino groups from organic molecules.

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Definitions:

Calcium Carbonate

A chemical compound with the formula CaCO3, found in rocks such as limestone, chalk, and marble, and is a major component of shells of marine organisms, snails, and eggs.

Chalk Formation

A type of soft, white, porous sedimentary rock composed mainly of calcite or aragonite, formed from the skeletal remains of microorganisms.

Microscopic Organisms

Tiny life forms, often single-celled, that can only be seen with the aid of a microscope.

Limestone

A sedimentary rock composed primarily of calcite or dolomite, widely used in construction and manufacturing.