Ch 2 -
Quiz 1.1 Chemistry of Life
Multiple
Choice
Identify
the choice that best completes the statement or answers the question.
1. The three particles that make up
atoms are
|
a. |
protons,
neutrons, and isotopes. |
c. |
positives,
negatives, and electrons. |
|
b. |
neutrons,
isotopes, and electrons. |
d. |
protons,
neutrons, and electrons. |
2. If a chlorine atom had 17 protons and
18 neutrons, it would be called
|
a. |
chlorine-17. |
c. |
chlorine-35. |
|
b. |
chlorine-18. |
d. |
chlorine-1. |
3. Which of the following terms
describes a substance formed by the combination of two or more elements in
definite proportions?
|
a. |
compound |
c. |
nucleus |
|
b. |
isotope |
d. |
enzyme |
4. A covalent bond is formed as the
result of
|
a. |
transferring
electrons. |
c. |
transferring
protons. |
|
b. |
sharing
an electron pair. |
d. |
sharing
a proton pair. |
5. Ice floats on water because
|
a. |
of
cohesion. |
c. |
water
shrinks when it freezes. |
|
b. |
ice has
a higher density than water. |
d. |
water
expands when it freezes. |
6. A solution is a(an)
|
a. |
combination
of isotopes. |
|
b. |
chemical
reaction. |
|
c. |
evenly
distributed mixture of two or more substances. |
|
d. |
combination
of two or more liquids. |
7. If the pH of stomach acid and of oven
cleaner were measured,
|
a. |
both
would be below 7. |
|
b. |
both
would be above 7. |
|
c. |
the pH
of stomach acid would be above 7, but the pH of oven cleaner would be below
7. |
|
d. |
the pH
of stomach acid would be below 7, but the pH of oven cleaner would be above
7. |
8. Amino acid is to protein as
|
a. |
fat is
to lipid. |
c. |
sugar is
to fat. |
|
b. |
DNA is
to RNA. |
d. |
simple
sugar is to starch. |
9. Which statement is true?
|
a. |
Simple
sugars are made of polysaccharides. |
|
b. |
Glycerol
is made of fatty acids. |
|
c. |
RNA
molecules are made of nucleotides. |
|
d. |
Amino
acids are made of proteins. |
10. What is the process that changes one
set of chemicals into another set of chemicals?
|
a. |
cohesion |
c. |
chemical
reaction |
|
b. |
adhesion |
d. |
dissolving |
11. Which of the following is a form of
energy that may be released during a chemical reaction?
|
a. |
heat |
c. |
light |
|
b. |
sound |
d. |
all of
the above |
12. Enzymes affect the reactions in living
cells by changing the
|
a. |
products
of the reaction. |
c. |
temperature
of the reaction. |
|
b. |
speed of
the reaction. |
d. |
pH of
the reaction. |
Modified
True/False
Indicate
whether the statement is true or false.
If false, change the identified word or phrase to make the statement
true.
13. The isotope oxygen-18 has 18
protons. _________________________
14. When sugar is dissolved in water, the
sugar and water are chemically combined. _________________________
15. Lipids are important parts of
biological membranes and waterproof coverings. _________________________
16. Proteins that speed up the rate of
chemical reactions in the cell without requiring high temperatures are antibodies.
_________________________
Completion
Complete
each statement.
17. Of the three subatomic particles,
___________ are most involved in forming chemical bonds.
18. A chemical bond formed by the transfer
of electrons is a(an) ____________________ bond.
19. The pH scale is a measurement system
that indicates the concentration of ____________________ in solution.
20. The name of an enzyme usually ends in
____________________.
Short
Answer
21. What is mass number?
22. What accounts for waters properties of
adhesion and cohesion?
23. When H2 gas and O2
gas react to form water, what happens to the atoms that were in the gases, and
what kind of bonds result?
24. Where does the energy that enables you
to breathe and think come from?
Other
USING SCIENCE SKILLS
|
Element |
Symbol |
Protons |
Neutrons |
Electrons |
Atomic Number |
Mass Number |
|
Hydrogen |
H |
1 |
|
|
1 |
|
|
Helium |
He |
2 |
|
|
|
4 |
|
Carbon |
C |
|
6 |
|
6 |
|
|
Oxygen |
O |
|
8 |
8 |
|
|
|
Neon |
Ne |
|
|
10 |
10 |
20 |
|
Aluminum |
Al |
13 |
|
|
|
27 |
|
Zinc |
Zn |
|
|
30 |
30 |
65 |
Figure 21
25. Applying Concepts Based on
Figure 21, what is the atomic number of oxygen?
USING SCIENCE SKILLS
|
pH Values of Some Common Substances |
|
|
Substance |
pH |
|
Hydrochloric acid |
1.0 |
|
Sulfuric acid |
1.2 |
|
Tomatoes |
4.2 |
|
Rainwater |
6.2 |
|
Pure water |
7.0 |
|
Sea water |
8.5 |
|
Ammonium chloride |
11.1 |
|
Sodium hydroxide |
13.0 |
Figure 22
26. Applying Concepts What is the
strongest acid listed in Figure 22?
27. Calculating A change of one unit
on the pH scale represents a tenfold increase in the concentration of hydrogen
ions. According to the pH values listed in Figure 22, how much greater is the
H+ ion concentration in tomatoes than in rainwater?
USING SCIENCE SKILLS
Figure 23
28. Applying Concepts Based on
Figure 23, which enzyme would have the most activity in humans?
Essay
29. Explain the difference between ionic
compounds and covalently bonded compounds.
30. How is chemistry related to living
things?
Ch 2 - Quiz
1.1 Chemistry of Life
Answer
Section
MULTIPLE
CHOICE
1. ANS: D PTS: 1 DIF: L1 REF: p. 35
OBJ: 2.1.1 NAT: B.1 | B.2 | B.4 KEY: knowledge
2. ANS: C PTS: 1 DIF: L3 REF: p. 36
OBJ: 2.1.2 NAT: B.1 | B.2 | B.4 KEY: evaluation
3. ANS: A PTS: 1 DIF: L1 REF: p. 37
OBJ: 2.1.3 NAT: B.1 | B.2 | B.4 KEY: knowledge
4. ANS: B PTS: 1 DIF: L1 REF: p. 38
OBJ: 2.1.4 NAT: B.1 | B.2 | B.4 KEY: knowledge
5. ANS: D PTS: 1 DIF: L2 REF: p. 40
OBJ: 2.2.1 NAT: B.1 | B.2 KEY: analysis
6. ANS: C PTS: 1 DIF: L1 REF: p. 42
OBJ: 2.2.2 NAT: B.1 | B.2 KEY: knowledge
7. ANS: D PTS: 1 DIF: L3 REF: p. 43
OBJ: 2.2.3 NAT: B.1 | B.2 KEY: synthesis
8. ANS: D PTS: 1 DIF: L3 REF: p. 45 | p. 47
OBJ: 2.3.1 NAT: B.2 | C.1.c | C.2.a STA: BL.4.e
| BL.5.a
KEY: synthesis
9. ANS: C PTS: 1 DIF: L2 REF: p. 46 | p. 47
OBJ: 2.3.1 NAT: B.2 | C.1.c | C.2.a STA: BL.5.a
KEY: analysis
10. ANS: C PTS: 1 DIF: L1 REF: p. 49
OBJ: 2.4.1 NAT: B.3 | B.5 | C.1.b KEY: knowledge
11. ANS: D PTS: 1 DIF: L2 REF: p. 50
OBJ: 2.4.2 NAT: B.3 | B.5 | C.1.b STA: BL.6.f
KEY: comprehension
12. ANS: B PTS: 1 DIF: L2 REF: p. 51
OBJ: 2.4.3 NAT: B.3 | B.5 | C.1.b STA: BL.1
KEY: application