Test Bank For Anatomy And Physiology The Unity Of Form And Function Saladin 7th Edition
Chapter 02 The Chemistry of Life
True / False Questions
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1. Minerals are organic elements extracted from the soil by plants. Â
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2. Molecules composed of two or more atoms are called compounds.Â
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3. Hydrogen, deuterium, and tritium are three isotopes of hydrogen.Â
4. Potassium, sodium, and chlorine are trace elements. Â
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5. Ionic bonds break apart in water more easily than covalent bonds do. Â
 6. A solution is a mixture of two or more substances that are physically blended but not chemically combined. Â
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7. The pH of blood plasma is approximately 7.4, which is slightly acidic.Â
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8. The high heat capacity of water makes it a very ineffective coolant.Â
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9. In an exchange reaction, covalent bonds are broken and new covalent bonds are formed.Â
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10. Chemical reactions in which larger molecules are broken down into smaller ones are called catabolic reactions. Â
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11. The opposite of a dehydration synthesis reaction is a hydrolysis reaction.Â
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12. Unsaturated fatty acids have as much hydrogen as they can carry.Â
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13. A dipeptide is a molecule with two peptide bonds.Â
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14. All amino acids have both a carboxyl group and an amino group attached to a central carbon.Â
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15. ATP is the body’s most important form of long-term energy storage. Â
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Multiple Choice Questions
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16. The most abundant element in the human body, by weight, is __________.Â
A. nitrogen
B. hydrogen
C. carbon
D. oxygen
E. calcium
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17. Sodium has an atomic number of 11 and an atomic mass of 23. Sodium has __________.Â
A. 12 neutrons and 11 protons
B. 12 protons and 11 neutrons
C. 12 electrons and 11 neutrons
D. 12 protons and 11 electrons
E. 12 electrons and 11 protons
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18. The chemical properties of an atom are determined by its __________.Â
A. protons
B. electrons
C. neutrons
D. protons and neutrons
E. particles
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19. Na (atomic no. 11) reacts with Cl (atomic no. 17) to become stable. In the reaction, Na will ____________, while Cl will ____________. Â
A. accept one electron; give up one electronÂ
B. give up one proton; accept one protonÂ
C. share one electron with chlorine; share one electron with sodiumÂ
D. become an anion; become a cationÂ
E. give up one electron; accept one electronÂ
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20. Oxygen has an atomic number of 8 and an atomic mass of 16. How many valence electrons does it have? Â
A. 2Â
B. 4Â
C. 6Â
D. 8Â
E. 16Â
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