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  1. Acids and bases. Why are these important in biology? It comes back to a number of biological processes. For example, enzymes work best at specific levels of acids or bases. Take your stomach, a very acidic environment. The enzymes that work in that environment could not work in your mouth.

    • 2: Cell Biology

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  2. Define acidity. Explain how acidity is measured. Compare and contrast acids and bases. Hydrochloric acid is secreted by the stomach to provide an acidic environment for the enzyme pepsin. What is the pH of this acid? How strong of an acid is it compared with other acids? True or False. Strong bases are gentle and cannot hurt you, unlike strong ...

  3. May 14, 2022 · While HCl is found in living systems (e.g., the gastric juice secreted by the stomach), the most common acids in biology are those containing the carboxyl group ("5"). The proton of the carboxyl group is easily removed forming the carboxyl ion ( "6" ).

  4. An acid is a substance that increases the concentration of hydrogen ions (H +) in a solution, usually by having one of its hydrogen atoms dissociate. A base provides either hydroxide ions (OH –) or other negatively charged ions that combine with hydrogen ions, reducing their concentration in the solution and thereby raising the pH.

  5. The environment in your stomach is highly acidic (pH = 1 to 2). Orange juice is mildly acidic (pH = approximately 3.5), whereas baking soda is basic (pH = 9.0). Acids are substances that provide hydrogen ions (H +) and lower pH, whereas bases provide hydroxide ions (OH –) and raise pH.

  6. Define acidity. Explain how acidity is measured. Compare and contrast acids and bases. Hydrochloric acid is secreted by the stomach to provide an acidic environment for the enzyme pepsin. What is the pH of this acid? How strong of an acid is it compared with other acids? Define an ion.

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  8. Jan 11, 2017 · We feel that it is incredibly important to define hygiene in terms of health outcomes, not just in terms of reduction in number of microbes. This allows for research (consider, for example, probiotics research) to address the root of hygienic practice: cleanliness in pursuit of improved health.

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