It's true that cell membrane prevents all substances from entering the cell and leaving the cell
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This sentence is FALSE: <em>The study of environmental science must involve discussion of human culture and people's opinions on politics and economics.</em>
→ The study of environmental science involve the natural components of Earth and also the connections between them.
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By increasing the enzyme concentration, the maximum reaction rate greatly increases. Conclusions: The rate of a chemical reaction increases as the substrate concentration increases. Enzymes can greatly speed up the rate of a reaction. However, enzymes become saturated when the substrate concentration is high.