Biology Life on Earth with Physiology 10th Edition By Audesirk – Test Bank
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Biology: Life on Earth with Physiology, 10e (Audesirk)
Chapter 3 Biological Molecules
3.1 Multiple Choice Questions
1) Prions are known to cause
1. A)
mad cow disease.
2. B)
the common cold.
3. C)
herpes.
4. D)
sickle cell anemia.
Answer: A
Diff: 2
Section: 3.1
Skill: Knowledge/Comprehension
2) Which of the following is NOT an organic molecule?
1. A)
Protein
2. B)
Nucleic acid
3. C)
Monosaccharide
4. D)
Carbon monoxide
5. E)
Lipid
Answer: D
Diff: 2
Section: 3.1
Skill: Knowledge/Comprehension
3) You are telling your friend that organic molecules are all
made up of carbon backbones with hydrogens. She doesn’t understand how there
can be so many different organic molecules if they all are made up of the same
basic components. You explain that organic molecules
1. A)
vary because they possess different isotopes of carbon.
2. B)
vary because they possess different functional groups.
3. C)
actually all have the same structure but differ in the number of electrons.
4. D)
are different because of the different types of hydrogen bonds that form.
Answer: B
Diff: 2
Section: 3.1
Skill: Application/Analysis
4) Which of the following best explains the molecular complexity
of living organisms?
1. A)
The large number of different monomers allows for the construction of many
polymers.
2. B)
Each organism has its own unique set of monomers for use in constructing
polymers.
3. C)
Condensation reactions can create different polymers because they can combine
virtually any molecules in the cell.
4. D)
Although there are not many biological molecules in cells, each one has many
different functions.
5. E) A
small number of monomers can be assembled into large polymers with many
different sequences.
Answer: E
Diff: 1
Section: 3.2
Skill: Application/Analysis
5) Large biological molecules are synthesized by removing
1. A)
carbon.
2. B)
covalent bonds.
3. C)
water.
4. D)
oxygen.
5. E)
peptides.
Answer: C
Diff: 1
Section: 3.2
Skill: Knowledge/Comprehension
6) What type of chemical reaction results in the breakdown of
organic polymers into their respective subunits?
1. A)
Condensation
2. B)
Oxidation
3. C)
Hydrolysis
4. D)
Ionization
Answer: C
Diff: 2
Section: 3.2
Skill: Knowledge/Comprehension
7) Which of the following reactions requires the removal of
water to form a covalent bond?
1. A)
Glycogen → glucose subunits
2. B)
Peptide → alanine + glycine
3. C)
Cellulose → glucose
4. D)
Glucose + galactose → lactose
5. E)
Fat → fatty acids + glycerol
Answer: D
Diff: 2
Section: 3.2
Skill: Application/Analysis
8) Which of the following best summarizes the relationship
between dehydration reactions and hydrolysis?
1. A)
Dehydration reactions assemble polymers, and hydrolysis breaks them down.
2. B)
Hydrolysis creates polysaccharides, and dehydration creates monosaccharides.
3. C)
Dehydration reactions can occur only after hydrolysis.
4. D)
Hydrolysis creates monomers, and dehydration reactions destroy them.
5. E)
Dehydration reactions occur only in animals, and hydrolysis reactions occur
only in plants.
Answer: A
Diff: 2
Section: 3.2
Skill: Application/Analysis
9) In dehydration synthesis, the atoms that make up a water
molecule are derived from
1. A)
oxygen.
2. B)
only one of the reactants.
3. C)
both of the reactants.
4. D)
carbohydrates.
5. E)
enzymes.
Answer: C
Diff: 2
Section: 3.2
Skill: Knowledge/Comprehension
10) If digestion is ________, then synthesis is ________.
1. A)
hydrolysis; dehydration
2. B)
dehydration; hydrolysis
3. C)
organic; inorganic
4. D)
inorganic; organic
Answer: A
Diff: 2
Section: 3.2
Skill: Application/Analysis
11) Hydrolysis may be correctly described as the
1. A)
heating of a compound in order to drive off its excess water and to concentrate
its volume.
2. B)
breaking of a compound into its subunits by adding water between the subunits.
3. C)
constant removal of hydrogen atoms from a carbohydrate.
4. D)
removal of water from a polymer.
Answer: B
Diff: 2
Section: 3.2
Skill: Synthesis/Evaluation
12) Keratin and silk are examples of ________, whereas glucose
and maltose are examples of ________.
1. A)
proteins; lipids
2. B)
proteins; carbohydrates
3. C)
carbohydrates; proteins
4. D)
nucleic acids; lipids
Answer: B
Diff: 1
Section: 3.2
Skill: Knowledge/Comprehension
13) Dehydration synthesis involves the removal of a hydrogen ion
and a hydroxyl ion. What happens next?
1. A) A
large polymer is split apart into small monomers.
2. B)
The hydrogen and hydroxyl ions interact to form water.
3. C) A
polysaccharide is released from a monosaccharide.
4. D)
The hydrogen ion becomes an isotope.
Answer: B
Diff: 2
Section: 3.2
Skill: Application/Analysis
14) Which molecule is a disaccharide?
1. A)
Glucose
2. B)
Water
3. C)
Lactose
4. D)
Fructose
Answer: C
Diff: 2
Section: 3.3
Skill: Knowledge/Comprehension
15) The carbohydrate in DNA is
1. A)
ribose.
2. B)
cellulose.
3. C)
glucose.
4. D)
deoxyribose.
5. E)
phosphate.
Answer: D
Diff: 1
Section: 3.3
Skill: Knowledge/Comprehension
16) Maltose is made from
1. A)
two peptides.
2. B)
two glucose molecules.
3. C)
glucose and fructose.
4. D) glucose
and galactose.
Answer: B
Diff: 1
Section: 3.3
Skill: Knowledge/Comprehension
17) The fiber in your diet is actually
1. A)
protein.
2. B)
ATP.
3. C)
starch.
4. D)
glycogen.
5. E)
cellulose.
Answer: E
Diff: 2
Section: 3.3
Skill: Knowledge/Comprehension
18) Chitin is an example of a
1. A)
monomer.
2. B)
polysaccharide.
3. C)
nucleic acid.
4. D)
peptide.
5. E)
triglyceride.
Answer: B
Diff: 1
Section: 3.3
Skill: Knowledge/Comprehension
19) Where is glycogen stored in vertebrate animals?
1. A)
Liver and muscles
2. B)
Brain and kidneys
3. C)
Teeth and bones
4. D)
Pancreas and blood
5. E)
Fat cells
Answer: A
Diff: 2
Section: 3.3
Skill: Knowledge/Comprehension
20) An example of a structural polysaccharide is
1. A)
maltose.
2. B)
chitin.
3. C)
starch.
4. D)
glucose.
5. E)
glycogen.
Answer: B
Diff: 2
Section: 3.3
Skill: Knowledge/Comprehension
21) Which of the following provides long-term energy storage for
plants?
1. A)
Glucose
2. B)
Glycogen
3. C)
Starch
4. D)
Cellulose
5. E)
ATP
Answer: C
Diff: 2
Section: 3.3
Skill: Knowledge/Comprehension
22) Lactose is a disaccharide of glucose and galactose, and its
digestion requires the actions of the enzyme lactase. If lactose is eaten as
part of the diet but is not digested by lactase, this sugar is then metabolized
by bacteria in the intestine, leading to the symptoms of lactose intolerance.
Lactose intolerance, therefore, results from a(n)
1. A)
lack of hydrolysis of lactose.
2. B)
lack of dehydration synthesis of lactose.
3. C)
low blood lactose level.
4. D)
inability of the body to produce lactose.
Answer: A
Diff: 2
Section: 3.3
Skill: Application/Analysis
23) In humans, dental cavities form when Streptococcus mutans bacteria
in the mouth hydrolyze sucrose. Which of the following is (are) the products of
this reaction?
1. A)
Glucose and fructose
2. B)
Starch
3. C)
Glucose and galactose
4. D)
Glycogen
Answer: A
Diff: 2
Section: 3.3
Skill: Application/Analysis
24) Which of the following can serve as an energy source and as
structural support in plant cells?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: B
Diff: 2
Section: 3.3
Skill: Knowledge/Comprehension
25) Which of the following include monosaccharide monomers?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: B
Diff: 1
Section: 3.3
Skill: Knowledge/Comprehension
26) When the level of glucose in your blood is high, your body
is able to store excess glucose in the liver by forming glycogen. When blood
glucose levels fall, this stored glucose can be released. Based on this
information, which of the following is true?
1. A)
Glucose is a polysaccharide that can join to form the monosaccharide glycogen.
2. B)
Glucose is not an organic molecule, but glycogen is an organic molecule.
3. C)
Glycogen is a polysaccharide formed by joining excess monosaccharides of
glucose.
4. D)
Glycogen is a highly branched functional group that forms a larger glucose
polymer.
Answer: C
Diff: 3
Section: 3.3
Skill: Application/Analysis
27) Which type of lipid is most important in biological membranes?
1. A)
Fat
2. B)
Steroid
3. C)
Phospholipid
4. D)
Oil
5. E)
Trans fat
Answer: C
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
28) Which of the following is insoluble in water?
1. A)
Olive oil
2. B)
DNA
3. C)
Sucrose
4. D)
Salt
5. E)
Amino acids
Answer: A
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
29) Cholesterol, testosterone, and estrogen are examples of
1. A)
fatty acids.
2. B)
proteins.
3. C)
steroids.
4. D)
hormones.
5. E)
waxes.
Answer: C
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
30) Triglycerides are
1. A)
polymers of amino acids.
2. B)
always composed of carbon rings.
3. C) a
main component of cellular membranes.
4. D)
hydrophilic.
5. E)
made from glycerol and fatty acids.
Answer: E
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
31) When 1 gram of each of these food sources is consumed, which
yields the greatest amount of energy in calories?
1. A)
Sucrose
2. B)
Glucose
3. C)
Phenylalanine
4. D)
Polypeptide
5. E)
Fat
Answer: E
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
32) Fats and oils are made of
1. A)
three glycerols and three fatty acids.
2. B)
three fatty acids and one glycerol.
3. C)
one glycogen and two phospholipids.
4. D)
two fatty acids and one carboxyl acid.
5. E)
three amino acids and one glycerol.
Answer: B
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
33) Phospholipids are unusual yet important to cell membrane
structure because they
1. A)
are part of DNA.
2. B)
contain nucleic acids.
3. C)
have a polar end and a nonpolar end.
4. D)
are found only in animals.
5. E)
are an important energy carrier molecule.
Answer: C
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
34) Lard is a solid fat at room temperature. What does this tell
you about the triglycerides in lard?
1. A)
The fats in lard are not organic molecules.
2. B)
Lard is composed of saturated fats.
3. C)
The fats in lard are mostly phospholipids.
4. D)
Lard is composed of unsaturated fats.
Answer: B
Diff: 2
Section: 3.4
Skill: Application/Analysis
35) New government regulations require that foods containing
trans fats be labeled appropriately. A trans fat is formed when food
manufacturers turn liquid oils into solid fats by adding hydrogen to vegetable
oils. This hydrogenation process produces a solid fat because adding the
hydrogen
1. A)
allows fats to form tertiary and quaternary structures.
2. B)
allows the fatty acid chains to pack together more tightly.
3. C)
causes a phospholipid to form.
4. D)
forms a wax molecule.
Answer: B
Diff: 2
Section: 3.4
Skill: Synthesis/Evaluation
36) All of the following lipids or lipid components are
hydrophobic EXCEPT:
1. A)
waxes.
2. B)
saturated fats.
3. C)
unsaturated fats.
4. D)
fatty acid “tails.”
5. E)
fatty acid “heads.”
Answer: E
Diff: 2
Section: 3.4
Skill: Application/Analysis
37) The fat substitute Olestra contains a sucrose backbone with
six to eight fatty acids attached. How is this different from a naturally
occurring fat?
1. A)
Naturally occurring fats contain a glycerol and three fatty acids.
2. B)
Naturally occurring fats contain a glycerol, two fatty acids, and a phosphate
group.
3. C)
Naturally occurring fats contain a sucrose backbone and three fatty acid
chains.
4. D) It
isn’t; Olestra and natural fats have the same structure, just different tastes.
Answer: A
Diff: 2
Section: 3.4
Skill: Synthesis/Evaluation
38) Two classes of organic compounds typically provide energy
for living systems. Representatives of these two classes are
1. A)
fats and amino acids.
2. B)
amino acids and glycogen.
3. C)
amino acids and ribose.
4. D)
fats and polysaccharides.
5. E)
nucleic acids and phospholipids.
Answer: D
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
39) Imagine that you have isolated a mysterious liquid from a
sample of food. You add the liquid to a beaker of water and shake vigorously.
After a few minutes, the water and the other liquid separate into two layers.
To which class of biological molecules does the unknown liquid most likely
belong?
1. A)
Carbohydrates
2. B)
Lipids
3. C)
Proteins
4. D)
Enzymes
5. E)
Nucleic acids
Answer: B
Diff: 2
Section: 3.4
Skill: Synthesis/Evaluation
40) In a biological membrane, the phospholipids are arranged
with the fatty acid chains facing the interior of the membrane. As a result,
the interior of the membrane is
1. A)
hydrophobic.
2. B)
hydrophilic.
3. C)
charged.
4. D)
polar.
5. E)
filled with water.
Answer: A
Diff: 2
Section: 3.4
Skill: Application/Analysis
41) Which of the following biological molecules possess large
nonpolar regions, making them insoluble in water?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: C
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
42) Which of the following groups is crucial to the structure
and function of the sex hormones estrogen and testosterone?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: C
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
43) Which of the following is true about waxes?
1. A)
They are a type of complex carbohydrate.
2. B)
They are an important food source, and most animals have enzymes for breaking
them down.
3. C)
They are saturated fats and are solid at normal outdoor temperatures.
4. D)
They are unsaturated and most similar to proteins.
Answer: C
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
44) Which of the following lipids makes up about 2% of the human
brain?
1. A)
Glycogen
2. B)
Myosin
3. C)
Glycerol
4. D)
Cholesterol
Answer: D
Diff: 1
Section: 3.4
Skill: Knowledge/Comprehension
45) HDL and LDL are different types of cholesterol found in the
blood. These compounds are
1. A)
carbohydrates.
2. B)
proteins.
3. C)
lipids.
4. D)
nucleic acids.
Answer: C
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
46) The group of biological molecules that are most diverse in
function is
1. A)
carbohydrates.
2. B)
lipids.
3. C)
proteins.
4. D)
nucleic acids.
Answer: C
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
47) Enzymes are ________ that catalyze chemical reactions within
the body.
1. A)
proteins
2. B)
carbohydrates
3. C)
lipids
4. D)
nucleic acids
Answer: A
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
48) The different proteins contained in living organisms are
composed of ________ unique amino acids.
1. A) 4
2. B) 20
3. C)
100
4. D)
1,000
5. E)
more than 5,000
Answer: B
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
49) The specific function of a protein is determined by the
1. A) exact
sequence of amino acids.
2. B)
number of disulfide bonds.
3. C)
hydrophilic “head” attached to the hydrophobic “tail.”
4. D)
fatty acids that are joined together in the polypeptide.
5. E)
number of peptide bonds it contains.
Answer: A
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
50) What do carbohydrates, lipids, and proteins have in common?
1. A)
Polymers of these organic molecules form monomers via dehydration synthesis
reactions.
2. B)
Covalent bonding holds these molecules together.
3. C)
All are inorganic molecules.
4. D)
All are important enzymes that function within the cell.
Answer: B
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
51) A peptide bond forms between which of these groups?
1. A)
Amino and aldehyde
2. B)
Carboxyl and amino
3. C) Hydroxyl
and carboxyl
4. D)
Phosphate and hydroxyl
5. E)
Carboxyl and aldehyde
Answer: B
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
52) All of the following are polysaccharides EXCEPT:
1. A)
starch.
2. B)
maltose.
3. C)
glycogen.
4. D)
chitin.
Answer: B
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
53) What maintains the secondary structure of a protein?
1. A)
Peptide bonds
2. B)
Disulfide bonds
3. C)
Hydrogen bonds
4. D)
Ionic bonds
Answer: C
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
54) Complex, three-dimensional, tertiary structures of proteins
result from
1. A)
ionic bonds.
2. B)
hydrogen bonds.
3. C)
disulfide bonds.
4. D)
both B and C.
Answer: D
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
55) The four polypeptides that are joined together to make
hemoglobin represent which level of protein organization?
1. A)
Primary structure
2. B)
Secondary structure
3. C)
Tertiary structure
4. D)
Quaternary structure
Answer: D
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
56) Which of the following is an example of a protein?
1. A)
Keratin
2. B)
Cellulose
3. C)
Estrogen
4. D)
ATP
Answer: A
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
57) Which type of molecule is most abundant in a typical cell?
1. A)
Hydrocarbon
2. B)
Protein
3. C)
Water
4. D)
Lipid
5. E)
Carbohydrate
Answer: C
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
58) Which of the following refers to the amino acid sequence of
proteins?
1. A)
Primary
2. B)
Secondary
3. C)
Tertiary
4. D)
Quaternary
Answer: A
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
59) What type of amino acid side chain would you expect to find
on the surface of a protein embedded in a cell membrane?
1. A)
Cysteine
2. B)
Hydrophobic
3. C)
Hydrophilic
4. D)
Charged
5. E)
Polar, but not charged
Answer: B
Diff: 2
Section: 3.5
Skill: Application/Analysis
60) A denatured protein differs from a normal protein because it
1. A)
does not contain amino acids.
2. B)
has lost its usual secondary and tertiary structures.
3. C) is
composed of nucleotides.
4. D)
contains many disulfide bonds.
Answer: B
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
61) Which of the following biological molecules are composed of
amino acid subunits?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: A
Diff: 1
Section: 3.5
Skill: Knowledge/Comprehension
62) Which of the following may possess primary, secondary,
tertiary, and quaternary structures?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: A
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
63) Your classmate is trying to keep all the facts about
biological molecules straight. He asks you to explain how amino acids and
proteins are related. What do you tell him?
1. A)
Proteins are made up of chains of amino acids.
2. B)
Amino acids are formed by joining together many proteins.
3. C)
Proteins are a portion of an amino acid.
4. D)
Proteins are chains of carbohydrates, and amino acids are a type of lipid.
Answer: A
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
64) Your friend is trying to learn about how to kill bacteria.
She reads that preservatives such as citric acid are added to foods because the
acidic environment kills bacteria by denaturing their proteins. She thinks this
sounds like a lot of scientific jargon and asks you what it means. How can you
explain it in simpler terms?
1. A)
Denaturing their proteins means that the proteins in bacteria are converted
into carbohydrates.
2. B)
The acid causes the cells to swell and burst open, also known as denaturation.
3. C)
Denaturing means that the proteins of the bacteria lose their structure and
can’t function, so the bacteria die.
4. D)
Denaturing refers to the fact that the bacterial cells divide too quickly and
die.
Answer: C
Diff: 3
Section: 3.5
Skill: Knowledge/Comprehension
65) Scientists consider prions to be “puzzling” proteins. Which
of the following is true about prions?
1. A)
Prions are proteins that are denatured more easily than most proteins.
2. B)
Prions are noninfectious proteins.
3. C)
Prions are infectious proteins that cannot be denatured by any amount of heat.
4. D)
Prions are proteins that cause nearby proteins to change shape and become
infectious.
Answer: D
Diff: 2
Section: 3.5
Skill: Knowledge/Comprehension
66) Which of the following correctly matches an organic polymer
with its monomers, respectively?
1. A)
Protein, amino acids
2. B)
Carbohydrate, polysaccharides
3. C)
Hydrocarbon, monosaccharides
4. D)
Lipid, steroids
5. E)
DNA, ATP
Answer: A
Diff: 2
Section: 3.6
Skill: Knowledge/Comprehension
67) The “backbone” of a nucleic acid molecule is made of
1. A)
nitrogenous bases.
2. B)
sugar and phosphate groups.
3. C)
ATP molecules.
4. D)
NAD+and FAD.
5. E)
amino acids.
Answer: B
Diff: 1
Section: 3.6
Skill: Knowledge/Comprehension
68) DNA carries genetic information in its
1. A)
helical form.
2. B)
sequence of bases.
3. C)
tertiary structure.
4. D)
phosphate groups.
5. E)
sugar groups.
Answer: B
Diff: 1
Section: 3.6
Skill: Knowledge/Comprehension
69) The covalent bonds joining two nucleotides within a single
strand of DNA form between
1. A) a
phosphate group and a base.
2. B)
deoxyribose and a phosphate group.
3. C)
adenine and guanine.
4. D)
the phosphate groups of each nucleotide.
Answer: B
Diff: 2
Section: 3.6
Skill: Knowledge/Comprehension
70) Adenosine triphosphate is an example of a(n)
1. A)
carbohydrate.
2. B)
protein.
3. C)
lipid.
4. D)
nucleotide.
5. E)
inorganic molecule.
Answer: D
Diff: 2
Section: 3.6
Skill: Knowledge/Comprehension
71) A nucleotide is made of a
1. A)
phospholipid, sugar, and base.
2. B) phosphate,
protein, and base.
3. C)
phosphate, sugar, and base.
4. D)
phospholipid, sugar, and protein.
Answer: C
Diff: 1
Section: 3.6
Skill: Knowledge/Comprehension
72) Which of these is NOT a nucleic acid or nucleotide?
1. A)
RNA
2. B)
DNA
3. C)
ATP
4. D)
LDL
Answer: D
Diff: 1
Section: 3.6
Skill: Knowledge/Comprehension
73) Suppose you have discovered a new virus and have isolated
its nucleic acids. What feature could you look for to determine whether the
nucleic acids of this virus are RNA or DNA?
1. A) If
it is RNA, it will contain ribose.
2. B) If
is RNA, it will contain deoxyribose.
3. C) If
it is DNA, the virus will not contain proteins.
4. D) If
it is RNA, there will be no adenine.
Answer: A
Diff: 2
Section: 3.6
Skill: Application/Analysis
74) Which of the following biological molecules are composed of
monomer units containing a sugar, a phosphate group, and a nitrogen-containing
base?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: D
Diff: 1
Section: 3.6
Skill: Knowledge/Comprehension
75) Which of these biological molecules contain genetic
information?
1. A)
Proteins
2. B)
Carbohydrates
3. C)
Lipids
4. D)
Nucleic acids
Answer: D
Diff: 2
Section: 3.6
Skill: Knowledge/Comprehension
3.2 True/False Questions
1) Functional groups determine the characteristics and chemical
reactivity of organic molecules.
Answer: TRUE
Diff: 1
Section: 3.1
Skill: Knowledge/Comprehension
2) Phospholipids have hydrophilic tail regions and hydrophobic
head regions.
Answer: FALSE
Diff: 2
Section: 3.4
Skill: Knowledge/Comprehension
3.3 Fill-in-the-Blank Questions
1) Carbon provides a backbone for a variety of biological
molecules. With an atomic number of 6, carbon typically forms ________ covalent
bonds.
Answer: four
Diff: 2
Section: 3.1
Skill: Knowledge/Comprehension
2) Important biological molecules that have a carbon backbone
bonded to hydrogen atoms are considered to be ________.
Answer: organic
Diff: 2
Section: 3.1
Skill: Knowledge/Comprehension
3) Many biological molecules are formed by the joining of
monomer units in a(n) ________ reaction (removal of water); the reverse process
occurs via a(n) ________ reaction (addition of water).
Answer: dehydration synthesis; hydrolysis
Diff: 2
Section: 3.2
Skill: Knowledge/Comprehension
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