An electrolyte is
A. a positively charged ion.
B. a negatively charged ion.
C. the alteration in the three-dimensional structure of a protein.
D. a combination of atoms held together by chemical bonds.
E. a substance that conducts electricity when placed in solution.
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Question 2) Solubility refers to the ability of one substance to ___________ in another.
A. react
B. dissolve
C. precipitate
D. conduct
E. None of these choices are correct.
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Question 3) An anion is
A. a molecule that conducts electricity when placed in solution.
B. a negatively charged ion.
C. a combination of atoms held together by chemical bonds.
D. an alteration in the three-dimensional structure of a protein.
E. a positively charged ion.
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Question 4) All of the synthesis reactions in the body are called
A. oxidation-reduction.
B. hydrolysis.
C. dissociation.
D. anabolism.
E. catabolism.
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Question 5) Which of the following is a synthesis reaction?
A. Two amino acids are bonded together to form a dipeptide.
B. Sodium chloride is dissolved in water.
C. ATP is converted to ADP.
D. Sucrose is chemically separated to form one molecule of glucose and one molecule of fructose.
E. Several dipeptide chains are formed from digestion of a long polypeptide chain.
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Question 6) Cations and anions that dissociate in water are sometimes called
A. molecules
B. nonelectrolytes and solutes.
C. electrolytes, because they can conduct an electrical current.
D. nonelectrolytes, because they do not conduct an electrical current.
E. molecules and electrolytes.
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Question 7) Chemical substances that dissolve in water or react with water to release ions are known as
A. buffers.
B. electrolytes.
C. bases.
D. inorganic compounds.
E. enzymes.
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Question 8) Intermolecular forces
A. separate atoms and ions from one another.
B. are electrostatic attractions between different molecules.
C. are found within molecules.
D. evenly distribute electrical charge among all atoms in a sample.
E. form dissociated ions.
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Question 9) A cation is
A. a molecule that conducts electricity when placed in solution.
B. an alteration in the three-dimensional structure of a protein.
C. a positively charged ion.
D. a combination of atoms held together by chemical bonds.
E. a negatively charged ion.
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Question 10) Electrolytes are substances that
A. are NOT found in the human body in any appreciable amounts.
B. form covalent bonds with water.
C. cannot conduct electricity in solution.
D. are NOT charged particles.
E. conduct electricity when dissolved in water.
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