4. A solution that helps prevent changes in pH is: A) an acid. B) a base. C) a b

Question

4. A solution that helps prevent changes in pH is: A) an acid. B) a base. C) a buffer. D) a neutral solution. 5. A base is defined as a chemical that A) accepts H'. B) releases H. 6. A/an reaction is one in which two or more smaller molecules are combined into a larger molecule A) covalent B) exergonic C) synthesis D) decomposition 7. Catabolism is a collective term for all the body's reactions. A) exchange B) decomposition C) reduction D) synthesis 8. Which of these is not a lipid? A) a prostaglandin B) cholesterol C) starch D) a fatty acid

Explanation / Answer

4 A solution that helps prevent changes in pH is:

Answer:- C) a buffer

Explanation:-A buffer is prevent a change in pH when H+ ions are added to or removed from a solution.A buffer system mainly consists of a weak acid and a weak base. These molecules of buffer system react with strong acids or bases that may be produced and change them to substances that do not have a great effect on pH.

5 A base is defined as a chemical that :

Answer:- A) accepts H+

Explanation:- basically base is defined as a chemical substance that releases hydroxide ions (OH- ) and accepts hydrogen ions (H+ ) in solution.

6 A/ an ________ reaction is one in which two or more smaller molecules are combined into larger molecule.

Answer:- C) synthesis

Explanation:- synthesis is a type of chemical reaction in which two or more smaller reactant molecules combine to produce a single larger compound molecule.

7 Catabolism is a collective term for all the body’s ____ reactions.

Answer:- B) decomposition

Explanation:-Catabolism is defined as a metabolic decomposition reactions that breakdown large molecules into smaller molecules and usually accompanied with the release of energy.

8 Which of these is not a lipid?

Answer:- C) starch

Explanation:- starch is a type of carbohydrates and that is polysaccharide.

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