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Which is the most toxic form of mercury?


A) CH₃Hg⁺
B) Hg⁰
C) Hg²⁺
D) Hg⁴⁺

Correct Answer

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What reaction is catalyzed by mercuric reductase?


A) CH₃HgCH₃ to Hg²⁺
B) CH₃Hg⁺ to Hg²⁺
C) Hg⁴⁺ to Hg²⁺
D) Hg²⁺ to Hg⁰

Correct Answer

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The metabolic process of ammonification ________ ammonia.


A) oxidizes
B) produces
C) reduces
D) transforms

Correct Answer

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The metabolic process of denitrification


A) oxidizes N₂.
B) oxidizes NO₃⁻.
C) reduces N₂.
D) reduces NO₃⁻.

Correct Answer

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