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MULTIPLE CHOICE
1. Which element is NOT paired with its correct symbol?
A. carbon – C
B. potassium – P
C. nitrogen – N
D. cobalt – Co
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 1
2. Which element is NOT paired with its correct symbol?
A. sodium – S
B. oxygen – O
C. magnesium – Mg
D. chlorine – Cl
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 1
3. Which element is NOT paired with its correct symbol?
A. hydrogen – H
B. sulfur – S
C. calcium – Ca
D. iron – I
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 1
4. For sodium, sulfur, zinc, and chlorine, the correct chemical symbols, in order, are:
A. S, Su, Z, Cl
B. Na, S, Zn, Cl
C. No, Su, Z, C
D. Na, S, Z, Cl
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 1
5. For iron, iodine, potassium, and phosphorus, the correct chemical symbols, in order, are:
A. I, Io, P, Ph
B. Fe, I, P, Ph
C. I, Io, K, P
D. Fe, I, K, P
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 1
6. For cobalt, copper, calcium, and carbon, the correct chemical symbols, in order, are:
A. Cb, Co, Ca, C
B. Co, Cp, Ca, Cr
C. Cb, Cu, Cm, C
D. Co, Cu, Ca, C
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 1
7. An ionic bond is formed when:
A. an atom of sodium loses an electron to another atom of sodium
B. an atom of sodium shares two electrons with two atoms of chlorine
C. an atom of sodium gains an electron from an atom of chlorine
D. an atom of sodium loses an electron to an atom of chlorine
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
8. Which statement is NOT true of ions?
A. An ion has either a positive or negative charge.
B. Atoms become ions by gaining or losing protons.
C. Ions with unlike charges are attracted to one another and form ionic bonds.
D. An atom that loses an electron will have a charge of +1.
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
9. An atom that has gained an electron is called:
A. an ion that is neutral
B. an ion with a charge of +1
C. an ion with a charge of –1
D. an atom with a charge of +1
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
10. A cation has:
A. a positive charge
B. a negative charge
C. a neutral charge
D. none of these, because the charge may vary
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
11. An anion has:
A. a positive charge
B. a negative charge
C. a neutral charge
D. none of these, because the charge may vary
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
12. A cation has:
A. a positive charge, and an example is a chloride ion
B. a negative charge, and an example is a potassium ion
C. a positive charge, and an example is a calcium ion
D. a negative charge, and an example is an iron ion
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
13. An anion has:
A. a positive charge, and an example is a hydrogen ion
B. a negative charge, and an example is a bicarbonate ion
C. a positive charge, and an example is a chloride ion
D. a negative charge, and an example is a sodium ion
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
14. Which statement is NOT true of ionic bonds?
A. They form salts.
B. In the solid state, they are very strong.
C. In water, many ionic bonds weaken.
D. They involve the sharing of electrons.
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
15. The term dissociation refers to:
A. ionic bonds
B. the breaking of bonds in a water solution
C. both A and B
D. both A and B and covalent bonds
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
16. A synonym for dissociation is:
A. decomposition
B. ionization
C. synthesis
D. reformulation
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
17. Dissociation of salts is important to:
A. free ions to take part in other reactions
B. produce energy
C. keep salt molecules stable in water
D. keep salt molecules stable as solids
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
18. Ionization of salts such as sodium chloride takes place:
A. when the temperature rises
B. when the temperature falls
C. in the solid state
D. in water
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 2
19. A covalent bond is formed when:
A. two or more atoms share electrons
B. two atoms form ions and are attracted to each other
C. one atom loses two electrons that are gained by another atom
D. a carbon atom loses all of its electrons to other atoms
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
20. A bond in which electrons are shared between atoms is:
A. ionic
B. reciprocal
C. covalent
D. di-electron
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
21. An atom of carbon has ____ electrons to share to form ____ bonds.
A. 2/ionic
B. 4/covalent
C. 2/covalent
D. 4/ionic
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
22. Which statement is NOT true of covalent bonds?
A. These bonds are not weakened when in water.
B. A molecule of water is formed by covalent bonds.
C. These bonds involve the sharing of electrons.
D. The atoms of most inorganic molecules are bonded by covalent bonds.
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
23. The bonds that help maintain the three-dimensional shape of proteins and nucleic acids are:
A. covalent bonds
B. hydrogen bonds
C. ionic bonds
D. water bonds
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
24. The bonds that make water cohesive are:
A. disulfide bonds
B. hydrogen bonds
C. ionic bonds
D. water bonds
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
25. The bonds that hold the two chains of an insulin molecule together are:
A. disulfide bonds
B. peptide bonds
C. ionic bonds
D. protein bonds
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
26. Disulfide bonds may be part of:
A. some starches
B. some proteins
C. DNA and RNA
D. true fats
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 3
27. Large molecules of glycogen are made of the smaller subunits called:
A. glucose
B. fatty acids and glycerol
C. amino acids
D. nucleotides
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
28. Glucose molecules are the subunits of:
A. starch
B. glycogen
C. both A and B
D. both A and B and cellulose
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
29. Glycogen and starch are ____ that are made of ____.
A. disaccharides/sucrose
B. polysaccharides/glucose
C. disaccharides/glucose
D. polysaccharides/sucrose
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
30. Glucose is a molecule that is:
A. a hexose sugar
B. a monosaccharide
C. both A and B
D. both A and B and inorganic
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
31. Glucose is a molecule that is a:
A. double sugar
B. hexose sugar
C. pentose sugar
D. triple sugar
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
32. The chemical formula for glucose is:
A. C12H6O12
B. C12H6O6
C. C6H6O6
D. C6H12O6
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
33. Glucose, fructose, and galactose are:
A. hexose sugars
B. monosaccharides
C. both A and B
D. both A and B, and all have the same chemical formula
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
34. Large molecules of true fats are made of the smaller subunits called:
A. fatty acids and glucose
B. fatty acids and glycerol
C. amino acids
D. nucleotides
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
35. Fatty acids and glycerol are the subunits of:
A. phospholipids
B. true fats
C. both A and B
D. both A and B and cholesterol
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
36. Large molecules of protein are made of the smaller subunits called:
A. glucose
B. fatty acids and glycerol
C. amino acids
D. nucleotides
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
37. Which statement is NOT true of amino acids?
A. They all contain the elements C, H, O, and N.
B. They are the subunits of proteins.
C. A chain of amino acids is linked by ionic bonds.
D. There are about 20 different amino acids in human proteins.
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
38. Large molecules of DNA and RNA are made of the smaller subunits called:
A. glucose
B. fatty acids and glycerol
C. amino acids
D. nucleotides
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
39. Which statement is NOT true of the subunits of organic molecules?
A. Glycogen is made of glucose.
B. Glycerol is found in true fats and in diglycerides.
C. DNA subunits are called deoxyprecursors.
D. The subunits of enzymes are amino acids.
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
40. Which statement is NOT true of saturated fats?
A. Most are plant oils.
B. They have the maximum number of hydrogen atoms.
C. They have single bonds between carbons.
D. They have been implicated in heart disease.
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
41. Which statement is NOT true of unsaturated fats?
A. They have one or more double bonds between carbons.
B. They have the maximum number of hydrogen atoms.
C. Most are plant oils.
D. They are made of fatty acids and glycerol.
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 4
42. The fluid found within lymph vessels is called:
A. lymph
B. plasma
C. intracellular fluid
D. tissue fluid
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
43. Lymph is a fluid that is found in:
A. lymph vessels
B. tissue spaces
C. both A and B
D. both A and B and between cells
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
44. The fluid found within veins is called:
A. lymph
B. plasma
C. intracellular fluid
D. tissue fluid
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
45. Plasma is a fluid that is found in:
A. veins
B. arteries
C. both A and B
D. both A and B and in capillaries
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
46. The fluid found within cells is called:
A. intercellular fluid
B. plasma
C. intracellular fluid
D. extracellular fluid
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
47. Intracellular fluid is found:
A. within cells
B. between cells
C. both A and B
D. both A and B and in tissue spaces
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
48. The fluid found in spaces between cells is called:
A. lymph
B. plasma
C. intracellular fluid
D. tissue fluid
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
49. The fluid found in spaces between cells is called:
A. tissue fluid
B. intercellular fluid
C. both A and B
D. both A and B and lymph
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
50. Intercellular fluid is found:
A. within cells
B. between cells
C. both A and B
D. both A and B and around cells
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 5
51. The fact that water changes temperature slowly is important for:
A. digestion of food
B. pumping of the heart
C. keeping a fairly constant body temperature
D. nerve impulse transmission
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 6
52. Water can absorb a great deal of heat, and this is important for:
A. sweating to lose excess body heat
B. digestion of very large meals
C. nerve impulse transmission
D. production of RBCs
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 6
53. The process of sweating depends upon water as a:
A. solvent
B. lubricant
C. transporter
D. heat absorber
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 6
54. The sense of taste depends upon water as a:
A. solvent
B. lubricant
C. transporter
D. heat absorber
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 7
55. The excretion of waste products in urine depends upon water as a:
A. solvent
B. lubricant
C. cushion
D. heat absorber
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 7
56. Which of these is NOT an example of the importance of water as a solvent?
A. the senses of smell and taste
B. synovial fluid in joints
C. transport of nutrients in the blood
D. excretion of waste products in urine
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 7
57. Swallowing depends upon water as a:
A. solvent
B. lubricant
C. cushion
D. heat absorber
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 7
58. Which of these is an example of the lubricant function of water?
A. the senses of smell and taste
B. synovial fluid in joints
C. transport of nutrients in the blood
D. excretion of waste products in urine
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 7
59. The storage form for glucose in the liver is:
A. glycogen
B. true fats
C. pentose sugars
D. oligosaccharides
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
60. The storage form for energy in adipose tissue is:
A. glycogen
B. true fats
C. pentose sugars
D. oligosaccharides
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
61. The carbohydrates that are part of DNA and RNA are:
A. glucose
B. starch
C. pentose sugars
D. oligosaccharides
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
62. The pentose sugars are part of:
A. starches
B. DNA and RNA
C. specialized enzymes
D. cell membranes
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
63. The self antigens on cell membranes are:
A. starch
B. pentose sugars
C. glucose
D. oligosaccharides
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
64. The oligosaccharides are attached to:
A. DNA and RNA as part of the genetic code
B. certain enzymes as part of the active site
C. structural proteins to provide stability
D. cell membranes as self antigens
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
65. The disaccharides are sugars that:
A. will be digested and used for energy, such as sucrose
B. will become part of DNA and RNA
C. will be digested for energy, such as fructose
D. are part of specialized enzymes
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
66. Which of these is NOT a disaccharide?
A. sucrose
B. galactose
C. maltose
D. lactose
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
67. Disaccharides in the diet are digested and used for:
A. energy
B. amino acids
C. proteins
D. cell membranes
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
68. Sucrose and lactose are:
A. monosaccharides
B. disaccharides
C. oligosaccharides
D. polysaccharides
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
69. The precursor molecule for steroid hormones is:
A. cholesterol
B. cellulose
C. phospholipids
D. enzymes
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
70. Cholesterol is important for the:
A. synthesis of steroid hormones
B. production of vitamin D
C. both A and B
D. both A and B and as part of cell membranes
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
71. Vitamin D may be synthesized in the body from:
A. amino acids
B. phospholipids
C. cholesterol
D. disaccharides
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
72. The undigested part of food that promotes peristalsis is:
A. cholesterol
B. cellulose
C. true fats
D. proteins
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
73. For people, the function of cellulose is to promote:
A. energy production between meals
B. peristalsis
C. loss of heat in hot weather
D. retention of heat in cold weather
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
74. The genetic material (genetic code) within cells is:
A. enzymes
B. RNA
C. DNA
D. phospholipids
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
75. The function of DNA is to:
A. be the genetic code within cells
B. serve as the site of protein synthesis
C. both A and B
D. both A and B and form chromosomes
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
76. The function of RNA is:
A. protein synthesis
B. cell respiration
C. to help synthesize DNA
D. to help synthesize ATP
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
77. RNA is different from DNA in that:
A. RNA is a single strand of amino acids
B. RNA has the base uracil where DNA has thymine
C. both A and B
D. neither A nor B
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
78. The catalysts of cellular reactions are:
A. phospholipids
B. nucleic acids
C. hexose sugars
D. enzymes
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
79. Within the body, proteins may be:
A. enzymes
B. hormones
C. structural components of tissues
D. all of these
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
80. Which organic molecule is NOT part of cell membranes?
A. glucose
B. protein
C. phospholipid
D. cholesterol
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
81. Which of the following are energy-storage molecules?
A. glucose and proteins
B. glycogen and true fats
C. proteins and glycogen
D. true fats and amino acids
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
82. Which statement is NOT true of organic molecules?
A. DNA is the genetic code in chromosomes.
B. Hormones may be steroids or proteins.
C. Phospholipids are part of cell membranes.
D. Oligosaccharides are energy-storage molecules.
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
83. Which statement is NOT true of organic molecules?
A. RNA is important for protein synthesis.
B. Cholesterol is part of cell membranes.
C. Glucose is the most important pentose sugar.
D. All enzymes are proteins.
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 8
84. The raw materials, or reactants, of cell respiration are:
A. glucose and oxygen
B. water and glucose
C. oxygen and carbon dioxide
D. carbon dioxide and glucose
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 9
85. Which of these is NOT a product of cell respiration?
A. water
B. carbon dioxide
C. ATP
D. oxygen
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 9
86. The purpose of cell respiration is to produce:
A. ATP from water
B. ATP from glucose
C. carbon dioxide from ATP
D. water from ATP
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 9
87. The waste product of cell respiration is:
A. carbon dioxide
B. water
C. ATP
D. heat
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 10
88. Biologically useful energy is released in cell respiration in the form of:
A. light
B. heat
C. ATP
D. movement
ANS: C PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 10
89. Cell respiration enables our cells to release the potential energy found in molecules of:
A. water
B. glucose
C. oxygen
D. minerals
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 10
90. In cell respiration, the breakdown of glucose to form ATP must take place in the presence of:
A. carbon dioxide
B. water
C. hydrogen
D. oxygen
ANS: D PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 10
91. If too much carbon dioxide accumulates in cells and tissues:
A. the pH will decrease
B. cell membranes will rupture
C. the pH will increase
D. cell membranes will shrivel
ANS: A PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques: 10
92. Which statement is NOT true of cell respiration?
A. It is the link between eating and breathing.
B. The water produced must be excreted or the cell will burst.
C. One of the energy products is heat.
D. ATP is biologically useful energy.
ANS: B PTS: 1 REF: Chapter 2 – Some Basic Chemistry | Rev Ques:
