Test Bank For Anatomy And Physiology The Unity Of Form And Function Saladin 7th Edition

Test Bank For Anatomy And Physiology The Unity Of Form And Function Saladin 7th Edition

Chapter 02 The Chemistry of Life

True / False Questions

 

1.  Minerals are organic elements extracted from the soil by plants.  

 

2. Molecules composed of two or more atoms are called compounds. 

 

3. Hydrogen, deuterium, and tritium are three isotopes of hydrogen. 

4.  Potassium, sodium, and chlorine are trace elements.  

 

5.  Ionic bonds break apart in water more easily than covalent bonds do.  

 6.  A solution is a mixture of two or more substances that are physically blended but not chemically combined.  

 

7. The pH of blood plasma is approximately 7.4, which is slightly acidic. 

 

8. The high heat capacity of water makes it a very ineffective coolant. 

 

9. In an exchange reaction, covalent bonds are broken and new covalent bonds are formed. 

 

10.  Chemical reactions in which larger molecules are broken down into smaller ones are called catabolic reactions.  

 

11. The opposite of a dehydration synthesis reaction is a hydrolysis reaction. 

 

12. Unsaturated fatty acids have as much hydrogen as they can carry. 

 

13. A dipeptide is a molecule with two peptide bonds. 

 

14. All amino acids have both a carboxyl group and an amino group attached to a central carbon. 

 

15.  ATP is the body’s most important form of long-term energy storage.  

 

 

Multiple Choice Questions

 

16. The most abundant element in the human body, by weight, is __________. 

A. nitrogen

B. hydrogen

C. carbon

D. oxygen

E. calcium

 

17. Sodium has an atomic number of 11 and an atomic mass of 23. Sodium has __________. 

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

 

 

18. The chemical properties of an atom are determined by its __________. 

A. protons

B. electrons

C. neutrons

D. protons and neutrons

E. particles

 

19.  Na (atomic no. 11) reacts with Cl (atomic no. 17) to become stable. In the reaction, Na will ____________, while Cl will ____________.  

A.  accept one electron; give up one electron 

B.  give up one proton; accept one proton 

C.  share one electron with chlorine; share one electron with sodium 

D.  become an anion; become a cation 

E.  give up one electron; accept one electron 

 

20.  Oxygen has an atomic number of 8 and an atomic mass of 16. How many valence electrons does it have?  

A.  2 

B.  4 

C.  6 

D.  8 

E.  16