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VanMeter: Microbiology for the Healthcare Professional
Chapter 02: Chemistry of Life
Test Bank
MULTIPLE CHOICE
1. The atomic number equals the number of
a. Protons
b. Neutrons
c. Electrons
d. Protons and neutrons
ANS: A
2. The atomic weight is equal to the sum of
a. Neutrons
b. Protons and neutrons
c. Neutrons and electrons
d. Electrons
ANS: B
3. The smallest units of matter are
a. Molecules
b. Atoms
c. Protons
d. Compounds
ANS: B
4. Protons are
a. Located in the shells
b. Part of the atomic nucleus
c. Negatively charged
d. Uncharged particles
ANS: B
Test Bank 2-2
5. Particles of an atom located in the outermost shell and available for chemical
bonding are called
a. Valence electrons
b. Isotopes
c. Excess electrons
d. Neutrons
ANS: A
6. Isotopes are atoms with
a. The same number of electrons and protons
b. Different numbers of protons and electrons
c. The same numbers of protons but a different number of neutrons
d. Different numbers of electrons
ANS: C
7. A chemical bond in which electrons are equally shared is a(n)
a. Ionic bond
b. Polar covalent bond
c. Nonpolar covalent bond
d. Hydrogen bond
ANS: C
8. The transfer of electrons in a chemical bond represents a(n)
a. Ionic bond
b. Polar covalent bond
c. Nonpolar covalent bond
d. Hydrogen bond
ANS: A
9. The bond of oxygen and hydrogen between water molecules is a(n)
a. Ionic bond
b. Polar covalent bond
c. Nonpolar covalent bond
d. Hydrogen bond
ANS: D
Test Bank 2-3
10. The isotope deuterium has
a. One proton
b. One proton and one neutron
c. One proton and two neutrons
d. One proton and three neutrons
ANS: B
11. After filling the first shell, the outermost shell of an atom can hold up to
__________ electrons.
a. 2
b. 6
c. 8
d. 10
ANS: C
12. The bond between sodium and chlorine atoms in sodium chloride is a(n)
a. Hydrogen bond
b. Ionic bond
c. Polar covalent bond
d. Nonpolar covalent bond
ANS: B
13. Sucrose is composed of
a. Glucose and galactose
b. Glucose and fructose
c. Fructose and maltose
d. Glucose and maltose
ANS: B
14. The unit molecules (monomers) of carbohydrates are
a. Monosaccharides
b. Amino acids
c. Nucleic acids
d. Fatty acids
ANS: A
Test Bank 2-4
15. The bond between amino acids is a(n)
a. Ionic bond
b. Peptide bond
c. Hydrogen bond
d. Covalent bond
ANS: B
16. Glucose and fructose are examples of
a. Monosaccharides
b. Disaccharides
c. Polysaccharides
d. Lipids
ANS: A
17. Two glucose molecules form
a. Galactose
b. Lactose
c. Maltose
d. Fructose
ANS: C
18. Starch is an example of a
a. Monosaccharide
b. Polysaccharide
c. Peptide
d. Protein
ANS: B
19. Cytosine always undergoes complementary base pairing with
a. Adenine
b. Guanine
c. Thymine
d. Uracil
ANS: B
Test Bank 2-5
20. The RNA nucleotide base that pairs with adenine of DNA is
a. Cytosine
b. Guanine
c. Thymine
d. Uracil
ANS: D
COMPLETION
1. Neutrons are __________ charged particles.
ANS: Not
2. An atom with the same number of protons but a different number of neutrons is
called a(n) __________.
ANS: Isotope
3. A positively charged ion is a(n) __________.
ANS: Cation
4. The breakdown of large molecules into smaller ones in the presence of water is
called __________.
ANS: Hydrolysis
5. Molecules that can absorb hydrogen ions and not change the pH of the substance
are __________.
ANS: Buffers
6. The formation of polymers from simpler substances is referred to as __________.
ANS: Synthesis
7. When the solute concentration outside a cell is the same as the concentration inside
the cell, the solution is called __________.
ANS: Isotonic
8. The monomers of triglycerides are __________ and fatty acids.
ANS: Glycerol
Test Bank 2-6
9. Lactose is composed of glucose and __________.
ANS: Galactose
10. Chemically, ATP is a(n) __________.
ANS: Nucleic acid
MATCHING
Match the description below with the correct item from this list.
a. Redox
b. Electron
c. Neutron
d. Acid
e. Base
f. Salt
g. Glucose
h. Protein
i. Polysaccharide
j. Nucleic acid
k. Lipid
l. Tritium
1. Radioactive isotope
2. Negatively charged particle
3. Reduction–oxidation reactions
4. Hydrogen ion donor
5. Ammonium chloride
6. Monomer
7. Cellulose
8. Particle with no charge
9. Prostaglandin
10. Amino acid chain
1. ANS: L
Test Bank
2
–
7
2. ANS:
B
3. ANS:
A
4. ANS:
D
5. ANS:
F
6. ANS:
G
7. ANS:
I
8. ANS:
C
9. ANS:
K
10. ANS:
H
