Review Questions
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5.1 The Building Blocks of Matter
 
5.2 Chemical Bonds
 
5.3 Acids and Bases
 
5.4 The Chemistry of Life
 
 
5.5 The Molecules of Life
 
5.6 Enzymes
 
5.7 Review Questions
 
5.8 Explanations
 
Review Questions
1. All of the following statements are true EXCEPT
(A) Hydrogen ions have different chemical properties from elemental hydrogen.
(B) Carbon isotopes have different chemical properties from elemental carbon.
(C) Carbon-14 has six protons and eight neutrons.
(D) Hydrogen ions are missing an electron.
(E) Ions have equal numbers of protons and neutrons.
2. How many atoms are there in C6H12O6?
(A) 3
(B) 6
(C) 12
(D) 24
(E) 144
3. Electrons are shared equally in which of the following chemical bonds?
(A) Nonpolar covalent bond
(B) Polar covalent bond
(C) Ionic bond
(D) Dipole-dipole bond
(E) Hydrogen bond
4. How many single bonds can carbon form with other atoms at the same time?
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
5. What chemical reaction takes place when two glucose monomers, or monosaccharides, form a dimer?
(A) Disassociation
(B) Dehydration synthesis
(C) Hydrolysis
(D) Ionization
(E) Isomerization
6. Which of the following polysaccharides stores carbohydrates in animals?
(A) Cellulose
(B) Glycogen
(C) Starch
(D) Glucose
(E) Fructose
7. What are the primary lipids found in cell membranes?
(A) Glycerol
(B) Cholestrol
(C) Fatty acids
(D) Phospholipids
(E) Oils
8. What are the components of nucleotides?
(A) Glycerols, fatty acids, and phosphates
(B) Sugars, phosphates, and nitrogenous bases
(C) Amino groups, hydrogens, and carboxyl groups
(D) Protons, neutrons, and electrons
(E) Protons and neutrons only
9. Which of the following represent a correct pairing of nitrogenous bases?
(A) Glycerol and uracil
(B) Guanine and uracil
(C) Nucleic acids and bases
(D) Cytosine and adenine
(E) Adenine and thymine
10. Which of the following statements is incorrect?
(A) Enzymes are made from proteins.
(B) One enzyme can facilitate the reaction of many different substrates.
(C) Enzymes sometimes use induced fits to break apart their substrates.
(D) Enzymes are not required for spontaneous reactions.
(E) Not all catalysts are enzymes.
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