Figure 2.1
Using Figure 2.1, match the following:
72)
Lipid
72)
73)
Are all chemical reactions reversible? If not, why aren’t they all reversible?
73)
Figure 2.1
Using Figure 2.1, match the following:
74)
Monosaccharide
74)
Figure 2.2
Using Figure 2.2, match the following:
75)
Phosphate
75)
76)
What properties does water have that make it a very versatile fluid?
76)
77)
What does the polar end of a phospholipid contain?
77)
78)
If all protons, electrons, and neutrons are alike, regardless of the atom considered, what
determines the unique properties of each element?
78)
79)
In the compound H2CO3, what do the numbers 2 and 3 represent?
79)
80)
Hydrogen bonds are more like a type of weak ________ than true bonds.
80)
81)
How can phospholipids form a film when mixed in water?
81)
82)
The ________ molecule directly provides energy for cellular work.
82)
83)
An atom with three electrons would have a valence of ________.
83)
Figure 2.1
Using Figure 2.1, match the following:
84)
Nucleotide
84)
85)
Weak acids and bases make good ________.
85)
86)
________ have a bitter taste, feel slippery, and are proton acceptors.
86)
87)
What is the major difference between polar and nonpolar covalent bonds?
87)
88)
When a set of electrodes connected to a light bulb is placed in a solution of dextrose and a
current is applied, the light bulb does not light up. When the same unit is placed in HCl, it
does. Why?
88)
89)
Starch is the stored carbohydrate in plants, while ________ is the stored carbohydrate in
animals.
89)
90)
Explain why chemical reactions in the body are often irreversible.
90)
Explanation:
Figure 2.1
Using Figure 2.1, match the following:
91)
Polysaccharide.
91)
Explanation:
Explanation:
Figure 2.2
Using Figure 2.2, match the following:
92)
Thymine
92)
TRUE/FALSE. Write ‘T’ if the statement is true and ‘F’ if the statement is false.
93)
Current information suggests that omega–3 fatty acids decrease the risk of heart disease.
93)
94)
Buffers resist abrupt and large changes in the pH of the body by releasing or binding ions.
94)
95)
Glucose is an example of a monosaccharide.
95)
96)
Isotopes differ from each other only in the number of electrons the atom contains.
96)
97)
Chemical properties are determined primarily by neutrons.
97)
98)
The fact that no chemical bonding occurs between the components of a mixture is the chief
difference between mixtures and compounds.
98)
99)
All organic compounds contain carbon.
99)
100)
A chemical bond is an energy relationship between outer electrons and neighboring atoms.
100)
101)
Hydrogen bonds are too weak to bind atoms together to form molecules but are important
intramolecular bonds.
101)
102)
The pH of body fluids must remain fairly constant for the body to maintain homeostasis.
102)
103)
A dipeptide can be broken into two amino acids by dehydration synthesis.
103)
104)
The atomic weight is only an average of relative weights of an atom and its isotopes, and it may
vary from the weight of a specific isotope.
104)
105)
The acidity of a solution reflects the free hydrogen ions in the solution
105)
106)
Lipids are a poor source of stored energy.
106)
107)
Glycogen, the storage form of glucose, is primarily stored in muscle tissue only.
107)
108)
The lower the pH, the higher the hydrogen ion concentration.
108)
109)
Mixtures are combinations of elements or compounds that are physically blended together but are
not bound by chemical bonds.
109)
110)
Covalent bonds are generally less stable than ionic bonds.
110)
111)
A charged particle is generally called an ion or electrolyte.
111)
112)
About 60% to 80% of the volume of most living cells consists of organic compounds.
112)
113)
It is the difference in the R group that makes each amino acid chemically unique.
113)
MATCHING. Choose the item in column 2 that best matches each item in column 1.
Match the following:
114)
Can be measured only by its effects on
matter.
A)
Energy
114)
Match the following:
115)
Heterogeneous, will settle.
A)
Suspensions
115)
Match the following chemical bonds to the correct description:
116)
A bond in which electrons are
completely lost or gained by the atoms
involved.
A)
Ionic bond
116)
Match the following:
117)
Blood.
A)
Mixture
117)
Match the following:
118)
Heterogeneous, will not settle.
A)
Colloids
Match the following:
119)
Number of protons in an atom
A)
Atomic number
119)
Match the following:
120)
Water.
A)
Compound
120)
Match the following:
121)
Anything that occupies space and has
mass.
A)
Matter
121)
Match the following:
122)
A)
neutrons in an atom
122)
Match the following:
123)
Energy that travels in waves. Part of
the electromagnetic spectrum.
A)
Radiant energy
123)
Match the following chemical bonds to the correct description:
124)
A bond in which electrons are shared
unequally.
A)
Polar covalent bond
124)
Match the following:
125)
Is a function of, and varies with,
gravity.
A)
Weight
125)
Match the following:
126)
Carbon.
A)
Element
126)
118)
Match the following particles to the correct description:
127)
Smallest particle of an element that
retains its properties.
A)
Atom
127)
Match the following:
128)
Dry ice (frozen carbon dioxide).
A
A)
Compound
128)
Match the following chemical bonds to the correct description:
129)
A type of bond important in tying
different parts of the same molecule
together into a three–dimensional
structure.
A
A)
Hydrogen bond
129)
Match the following particles to the correct description:
130)
Electrically charged particle due to
loss of an electron.
A
A)
Cation
130)
Match the following:
131)
Legs moving the pedals of a bicycle.
A
A)
Mechanical energy
131)
Match the following:
132)
Although a man who weighs 175
pounds on Earth would be lighter on
the moon and heavier on Jupiter, his
________ would not be different.
A
A)
Mass
132)
Match the following:
133)
First one or two letters of an element’s
name
A
A)
Atomic symbol
133)
Match the following particles to the correct description:
134)
Neutral subatomic particle.
A
A)
Neutron
134)
A
Match the following chemical bonds to the correct description:
135)
A bond in which electrons are shared
equally.
A)
Nonpolar covalent bond
135)
Match the following:
136)
Will not scatter light.
A
137)
Homogeneous, will not settle.
A
137)
A)
Solutions
136)
Match the following:
138)
Represented by the flow of charged
particles along a conductor, or the
flow of ions across a membrane.
A
A)
Electrical energy
138)
Match the following particles to the correct description:
139)
Smallest particle of a compound that
still retains its properties.
A
A)
Molecule
139)
Match the following:
140)
When the bonds of ATP are broken,
energy is released to do cellular work.
A
A)
Chemical energy
140)
ESSAY. Write your answer in the space provided or on a separate sheet of paper.
141)
Mrs. Mulligan goes to her dentist and, after having a couple of cavities filled, her dentist strongly suggests that
she reduce her intake of sodas and increase her intake of calcium phosphates in the foods she eats. Why?
142)
A 65–year–old patient came to the emergency room with complaints of severe heartburn unrelieved by taking a
“large handful” of antacids. Would you expect the pH to be high or low? Explain why.
A
143)
How can DNA be used to “fingerprint” a suspect in a crime?
144)
Although his cholesterol levels were not high, Mr. Martinez read that cholesterol was bad for his health, so he
eliminated all foods and food products containing this molecule. He later found that his cholesterol level
dropped only 20%. Why did it not drop more?
145)
Brenda is a 26–year–old female who is being discharged from the hospital after a vaginal delivery of an
8–pound healthy infant. Brenda is instructed by the nurse to eat a diet high in fiber and to drink 8 glasses of
water per day to prevent constipation. Explain the role of fiber and water to promote defecation.
146)
A 23–year–old male was riding his road bike in 100–degree heat, when he suddenly became nauseated and
weak. He called 911 from his cell phone. When the ambulance came, the paramedics started intravenous
therapy for severe dehydration. Explain the critical role of water to maintain homeostasis.
147)
Why is it possible for us to drink a solution that contains a mixture of equal concentration of a strong acid and a
strong base, either of which, separately, would be very caustic?
Answer Key
Testname: C2
31
Answer Key
Testname: C2
Answer Key
Testname: C2
Answer Key
Testname: C2