Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.

Q: Question: What is made of gases that are essential for photosynthesis and other life activities? Answer: atmosphere

A: The atmosphere is made of gases that are essential for photosynthesis and other life activities.
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Q: Question: What is used to fluoridate drinking water to promote dental health Answer: calcium fluoride

A: Calcium fluoride is used to fluoridate drinking water to promote dental health. Crystalline CaF 2 (d = 3.1805 3.
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Q: Question: What is controlled by regulatory proteins that bind to regulatory elements on dna? Answer: gene transcription

A:
Gene transcription is controlled by regulatory proteins that bind to regulatory elements on DNA. The proteins usually either activate or repress transcription.
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