Question 1

The sequence of amino acids is the ____ structure of proteins.

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  stereo 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  stereo

Question 2

A lipid __________ is the most common conformation of the membrane of living systems.

Accepted Answer

The answer of A lipid __________ is the most common...

Question 3

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group.
a.-COOH
b.-CHS1U1B13S1U1B0
c.-NHS1U1B12S1U1B0
d.-OH
e.   
f.-POS1U1B14S1U1B0S1U1P13S1S1P0S1U1P1-S1S1P0
g.-CHO
-A __________ is a term given to a macromolecule (large molecule) made up of individual subunits.

Accepted Answer

The answer of Classification.The following are chemical functional groups that...

Question 4

-Glucose and sugars in DNA and RNA

Accepted Answer

A)  have the same number of carbon atoms. 
B)  have the same structural formulas. 
C)  are the two components of sucrose. 
D)  are monosaccharides. 
E)  are both components of RNA. 
A)  have the same number of carbon atoms. 
B)  have the same structural formulas. 
C)  are the two components of sucrose. 
D)  are monosaccharides. 
E)  are both components of RNA.

Question 5

-Polyunsaturated fats

Accepted Answer

A)  have fewer hydrogen atoms than do saturated fats. 
B)  are more characteristic of animal fats than plant fats. 
C)  have no double bonds. 
D)  are solid at room temperature. 
E)  are none of these. 
A)  have fewer hydrogen atoms than do saturated fats. 
B)  are more characteristic of animal fats than plant fats. 
C)  have no double bonds. 
D)  are solid at room temperature. 
E)  are none of these.

Question 6

Hydrogenation is a chemical process that

Accepted Answer

A)  turns liquid oil to solid fats. 
B)  turns amino acids into proteins. 
C)  turns DNA into lipids. 
D)  creates stable alternative energy sources. 
E)  does none of these. 
A)  turns liquid oil to solid fats. 
B)  turns amino acids into proteins. 
C)  turns DNA into lipids. 
D)  creates stable alternative energy sources. 
E)  does none of these.

Question 7

-Which of the following does not belong?

Accepted Answer

A)  phospholipids 
B)  polysaccharides 
C)  unsaturated fats 
D)  steroids 
E)  saturated fats 
A)  phospholipids 
B)  polysaccharides 
C)  unsaturated fats 
D)  steroids 
E)  saturated fats

Question 8

-The figure above illustrates a ____ reaction that produces two _____ and a ____.

Accepted Answer

A)  condensation; hydroxyls; polymer 
B)  condensation; water molecules; polymer 
C)  cleavage; water molecules; monomer 
D)  rearrangement; water molecules; polymer 
E)  rearrangement; hydrogen ions; polymer 
A)  condensation; hydroxyls; polymer 
B)  condensation; water molecules; polymer 
C)  cleavage; water molecules; monomer 
D)  rearrangement; water molecules; polymer 
E)  rearrangement; hydrogen ions; polymer

Question 9

MATCHING
Matching.Choose the one most appropriate item from its description.
a.a six-carbon sugar
b.found in DNA and RNA
c.principal components of cell membranes
d.affect metabolic reaction rates
-glucose

Accepted Answer

The answer of MATCHING
Matching.Choose the one most appropriate item from...

Question 10

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group.
a.-COOH
b.-CHS1U1B13S1U1B0
c.-NHS1U1B12S1U1B0
d.-OH
e.   
f.-POS1U1B14S1U1B0S1U1P13S1S1P0S1U1P1-S1S1P0
g.-CHO
-the group that is acidic

Accepted Answer

The answer of Classification.The following are chemical functional groups that...

Question 11

-The dotted areas in the figure above indicate where ____ reactions will occur to produce ____ and ____.

Accepted Answer

A)  condensation; covalent bonds; hydroxyl ions 
B)  electron transfer; covalent bonds; water molecules 
C)  condensation; covalent bonds; water molecules 
D)  cleavage; covalent bonds; hydrogen ions 
E)  condensation; ionic bonds; hydrogen ions 
A)  condensation; covalent bonds; hydroxyl ions 
B)  electron transfer; covalent bonds; water molecules 
C)  condensation; covalent bonds; water molecules 
D)  cleavage; covalent bonds; hydrogen ions 
E)  condensation; ionic bonds; hydrogen ions

Question 12

-Cellulose is

Accepted Answer

A)  a polysaccharide found in cell walls of plants. 
B)  a component of cell membranes. 
C)  an oligosaccharide. 
D)  formed by hydrolysis of monosaccharides. 
E)  a component of invertebrate exoskeletons. 
A)  a polysaccharide found in cell walls of plants. 
B)  a component of cell membranes. 
C)  an oligosaccharide. 
D)  formed by hydrolysis of monosaccharides. 
E)  a component of invertebrate exoskeletons.

Question 13

Which of the following is NOT found in every nucleotide?

Accepted Answer

A)  ribose 
B)  a phosphate group 
C)  a single-ring base 
D)  a double-ring base 
E)  nitrogen 
A)  ribose 
B)  a phosphate group 
C)  a single-ring base 
D)  a double-ring base 
E)  nitrogen

Question 14

-Which of the following does NOT describe some aspect of polysaccharides?

Accepted Answer

A)  energy storage 
B)  straight or branched chain 
C)  glucose subunits 
D)  contain only carbon, hydrogen, and oxygen atoms 
E)  produced by condensation reactions 
A)  energy storage 
B)  straight or branched chain 
C)  glucose subunits 
D)  contain only carbon, hydrogen, and oxygen atoms 
E)  produced by condensation reactions

Question 15

An -OH group is a(n) ____ group.

Accepted Answer

A)  carboxyl 
B)  hydroxyl 
C)  amino 
D)  methyl 
E)  carbonyl 
A)  carboxyl 
B)  hydroxyl 
C)  amino 
D)  methyl 
E)  carbonyl

Question 16

-Which of the following is NOT true of polysaccharides?

Accepted Answer

A)  composed of many linked monosaccharides 
B)  may be straight and unbranched or highly branched 
C)  most likely made of glucose molecules if they are one of the natural polysaccharides 
D)  may be insoluble because of their large size and structure 
E)  are formed by cleavage reactions 
A)  composed of many linked monosaccharides 
B)  may be straight and unbranched or highly branched 
C)  most likely made of glucose molecules if they are one of the natural polysaccharides 
D)  may be insoluble because of their large size and structure 
E)  are formed by cleavage reactions

Question 17

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group.
a.-COOH
b.-CHS1U1B13S1U1B0
c.-NHS1U1B12S1U1B0
d.-OH
e.   
f.-POS1U1B14S1U1B0S1U1P13S1S1P0S1U1P1-S1S1P0
g.-CHO
-the amine group

Accepted Answer

The answer of Classification.The following are chemical functional groups that...

Question 18

-Cholesterol

Accepted Answer

A)  has a rigid backbone of four carbon rings. 
B)  is the most common steroid in animal tissue. 
C)  is a lipid without a fatty-acid component. 
D)  is needed to produce sexual development and maturity. 
E)  is all of these. 
A)  has a rigid backbone of four carbon rings. 
B)  is the most common steroid in animal tissue. 
C)  is a lipid without a fatty-acid component. 
D)  is needed to produce sexual development and maturity. 
E)  is all of these.

Question 19

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group.
a.-COOH
b.-CHS1U1B13S1U1B0
c.-NHS1U1B12S1U1B0
d.-OH
e.   
f.-POS1U1B14S1U1B0S1U1P13S1S1P0S1U1P1-S1S1P0
g.-CHO
-the carbonyl group of fructose

Accepted Answer

The answer of Classification.The following are chemical functional groups that...

Question 20

The interaction of several polypeptide chains in a hemoglobin molecule is its ____ structure.

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  combined 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  combined

Exam 3: Molecules of Life

The sequence of amino acids is the ____ structure of proteins.

A lipid __________ is the most common conformation of the membrane of living systems.

-Glucose and sugars in DNA and RNA

-Polyunsaturated fats

Hydrogenation is a chemical process that

-Which of the following does not belong?

-The figure above illustrates a ____ reaction that produces two _____ and a ____.

MATCHING Matching.Choose the one most appropriate item from its description. a.a six-carbon sugar b.found in DNA and RNA c.principal components of cell membranes d.affect metabolic reaction rates -glucose

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group. a.-COOH b.-CH3 c.-NH2 d.-OH e. f.-PO43- g.-CHO -the group that is acidic

-The dotted areas in the figure above indicate where ____ reactions will occur to produce ____ and ____.

-Cellulose is

Which of the following is NOT found in every nucleotide?

-Which of the following does NOT describe some aspect of polysaccharides?

An -OH group is a(n) ____ group.

-Which of the following is NOT true of polysaccharides?

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group. a.-COOH b.-CH3 c.-NH2 d.-OH e. f.-PO43- g.-CHO -the amine group

-Cholesterol

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group. a.-COOH b.-CH3 c.-NH2 d.-OH e. f.-PO43- g.-CHO -the carbonyl group of fructose

The interaction of several polypeptide chains in a hemoglobin molecule is its ____ structure.

Invitation to Biology

Lifes Chemical Basis

Cell Structure and Function

Ground Rules of Metabolism

Where It Startsphotosynthesis

How Cells Release Chemical Energy

Dna Structure and Function

From Dna to Protein

Gene Control

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Processes of Evolution

Organizing Information About Species

Lifes Origin and Early Evolution

Viruses and Prokaryotes

Protiststhe Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolutionthe Invertebrates

Animal Evolutionthe Chordates

Animal Evolutionhuman Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

-The figure above illustrates a __ reaction that produces two _ and a __.

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group. a.-COOH b.-CH₃ c.-NH₂ d.-OH e. f.-PO₄³^- g.-CHO -the group that is acidic

-The dotted areas in the figure above indicate where reactions will occur to produce and .

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group. a.-COOH b.-CH₃ c.-NH₂ d.-OH e. f.-PO₄³^- g.-CHO -the amine group

Classification.The following are chemical functional groups that may be part of a biologically active molecule.Answer the questions by matching the items with the most appropriate group. a.-COOH b.-CH₃ c.-NH₂ d.-OH e. f.-PO₄³^- g.-CHO -the carbonyl group of fructose