What Two Condition(s) Must Exist Before the Enzymes Involved in Nitrate

question 28

Multiple Choice

What two condition(s) must exist before the enzymes involved in nitrate (NO3- ) reduction are fully expressed?

• A) Both nitrate and oxygen must be absent.
• B) Nitrate must be absent, and oxygen must be present.
• C) Nitrate must be present, and oxygen must be absent.
• D) Both nitrate and oxygen must be present.

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