Multiple choice

Which of the following compounds is an important cell signaling molecule as well as a pollutant?

  1. Niobium oxychloride

  2. Niobium(V) chloride

  3. Nitric oxide

  4. Nitrosylsulfuric acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nitric oxide is an important cell signaling molecule in mammals, including humans. Nitric oxide is an air pollutant produced by combustion of substances in air, like in automobile engines and fossil fuel power plants.

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