Question 1

All of the following are examples of monomer: polymer pairings except

Accepted Answer

A)  amino acids: polypeptides.
B)  monosaccharides: polypeptide.
C)  nucleotides: DNA.
D)  glucose: starch.
E)  fatty acids: triglycerides.F) A) and B)
G) D) and E)

Question 2

Relatively small organic molecules with a central carbon atom which is bonded to a carboxyl group,an amino group,a carbon containing group,and a hydrogen atom are called

Accepted Answer

A)  amino acids.
B)  fatty acids.
C)  enzymes.
D)  peptides.
E)  nucleotides.F) C) and D)
G) D) and E)

Question 3

The human immunodeficiency virus (HIV) uses RNA,rather than DNA,to encode genetic information.During infection,however,HIV uses an enzyme known as reverse transcriptase to generate double-stranded DNA.Generally speaking,how would the enzyme generate a double strand of DNA from a single strand of RNA?

Accepted Answer

A)  Reverse transcriptase first catalyzes the synthesis of a DNA copy from the viral RNA,and then catalyzes the synthesis of a second strand of DNA complementary to the first one.
B)  Reverse transcriptase first catalyzes the synthesis of a RNA copy from the viral DNA,and then catalyzes the synthesis of a second strand of RNA complementary to the first one.
C)  Reverse transcriptase first catalyzes the synthesis of a DNA copy from the viral RNA,and then catalyzes the synthesis of a second strand of RNA complementary to the first one.D) None of the above
E) All of the above

Question 4

Humans are unable to get metabolic energy from cellulose because

Accepted Answer

A)  cellulose contains very little chemical energy.
B)  cellulose is not part of a normal diet.
C)  cellulose digesting enzymes are absent.
D)  cellulose does not taste gooD.
E)  cellulose is present in large quantities in the gut.F) C) and E)
G) C) and D)

Question 5

This atom in its unbound state has four valent electrons.These electrons readily form single,double,and even triple bonds among themselves to become stable.This atom is

Accepted Answer

A)  carbon.
B)  hydrogen.
C)  oxygen.
D)  nitrogen.
E)  phosphorus.F) A) and E)
G) A) and B)

Question 6

Muscle contraction is accomplished by a mechanism known as the cross-bridge cycle,in which myosin heads bind to actin and cause the actin filaments to move across the myosin filaments.Which of the following is capable of providing the energy needed for this process?

Accepted Answer

A)  ATP
B)  FAD
C)  NAD+
D)  enzymesE) All of the above
F) A) and C)

Question 7

Functional groups found in amino acids include all of the following except

Accepted Answer

A)  -NH2.
B)  phosphate.
C)  -COOH.
D)  -OH.
E)  alkyl (linked multiple carbons with hydrogens) .F) A) and E)
G) A) and D)

Question 8

Egg whites consist primarily of water and the protein albumin.When you fry an egg,why does the egg white turn from clear to white?

Accepted Answer

A)  The protein becomes dissociated.
B)  The protein acquires tertiary structure.
C)  The protein becomes denatured.
D)  The protein becomes dehydrateD.E) All of the above
F) None of the above

Question 9

Proteins possess all of the following functions except

Accepted Answer

A)  structure.
B)  metabolism.
C)  encode genetic information.
D)  membrane transport.
E)  cell recognition.F) B) and C)
G) B) and D)

Question 10

Phospholipids are created with

Accepted Answer

A)  phosphodiester bonds
B)  peptide bonds
C)  a phosphate and two fatty acids bonded to glycerol
D)  sugar polymersE) A) and B)
F) B) and C)

Question 11

Which of the following is not a protein?

Accepted Answer

A)  enzyme
B)  antibody
C)  keratin
D)  pectin
E)  collagenF) C) and E)
G) A) and C)

Question 12

You have recently identified a novel protein.After obtaining the protein sequence you realize that this protein contains several motifs and domains.How might this information help you to determine the function of your new protein?

Accepted Answer

A)  All motifs and domains have a calatogued structure and function.Therefore,identification of such structures in the new protein will easily determine its function.
B)  Motifs and domains are patterns that exist in protein structure and are often associated with particular functions.Therefore,identification of such sites can provide insight into possible functions of the unknown protein.
C)  This information would not likely aid in determining the function of the new protein.D) A) and B)
E) None of the above

Question 13

People who are lactose intolerant can often consume some products made from milk such as cheese and yogurt.By comparison,people with a true milk allergy,which involves an immune response to milk protein,cannot consume milk or products made from milk.Given this information,which of the following statements is true?

Accepted Answer

A)  The protein that causes a true milk allergy is lactose.
B)  All people who are lactose intolerant are also allergic to milk.
C)  Yogurt contains live and active cultures of Lactobacillus acidophilus bacteria and therefore prevents an allergic response in people with a true milk allergy.
D)  Lactose is a carbohydrate,not a protein and is therefore not the cause of true milk allergies.E) All of the above
F) B) and C)

Question 14

A common lipid for energy storage is

Accepted Answer

A)  phospholipid.
B)  steroid.
C)  triglycerides.
D)  cholesterol.
E)  wax.F) All of the above
G) A) and B)

Question 15

You recently identified a novel protein that contains several membrane-spanning domains.Which of amino acids would you expect to be most common in these domains?

Accepted Answer

A)  nonpolar
B)  polar uncharged
C)  charged
D)  aromaticE) None of the above
F) A) and B)

Question 16

Proteins are polymers formed of structural units called

Accepted Answer

A)  fatty acids.
B)  amino acids.
C)  nucleic acids.
D)  phosphate groups.
E)  sugars.F) A) and D)
G) A) and C)

Question 17

Which of the following is not a component of nucleic acids?

Accepted Answer

A)  a five-carbon sugar
B)  a six-carbon sugar
C)  a phosphate group
D)  phosphodiester bonds
E)  an organic nitrogen containing baseF) B) and C)
G) A) and D)

Question 18

The special molecules that have large structures and characteristically made by living organisms are known as ________.

Accepted Answer

A)  macromolecules
B)  polysaccharides
C)  proteins
D)  carbonE) A) and C)
F) A) and B)

Question 19

__________ are polymers containing up to 20 different kinds of naturally occurring amino acids.

Accepted Answer

A)  lipids
B)  proteins
C)  carbohydrates
D)  nucleic acidsE) C) and D)
F) B) and D)

Question 20

DNA and RNA are similar in some respects and different in others.Which of the following statements is not accurate about their similarities?

Accepted Answer

A)  Both DNA and RNA nucleotides contain the nitrogen bases adenine,cytosine,and guanine.
B)  Both DNA and RNA always double helices.
C)  Both DNA and RNA contain monosaccharide sugars on their respective nucleotides.
D)  Both DNA and RNA are involved in the "Central Dogma" of biology.
E)  Both DNA and RNA contain phosphate groups on their respective nucleotides.F) D) and E)
G) B) and D)

Exam 3: The Chemical Building Blocks of Life

Correct Answer
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Egg whites consist primarily of water and the protein albumin.When you fry an egg,why does the egg white turn from clear to white?

Correct Answer
verified

Correct Answer
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__________ are polymers containing up to 20 different kinds of naturally occurring amino acids.

Correct Answer
verified

Muscle contraction is accomplished by a mechanism known as the cross-bridge cycle,in which myosin heads bind to actin and cause the actin filaments to move across the myosin filaments.Which of the following is capable of providing the energy needed for this process?

Correct Answer
verified

Which of the following is not a component of nucleic acids?

Correct Answer
verified

All of the following are examples of monomer: polymer pairings except

Correct Answer
verified

Proteins possess all of the following functions except

Correct Answer
verified

This atom in its unbound state has four valent electrons.These electrons readily form single,double,and even triple bonds among themselves to become stable.This atom is

Correct Answer
verified

Proteins are polymers formed of structural units called

Correct Answer
verified

Functional groups found in amino acids include all of the following except

Correct Answer
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A common lipid for energy storage is

Correct Answer
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Which of the following is not a protein?

Correct Answer
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DNA and RNA are similar in some respects and different in others.Which of the following statements is not accurate about their similarities?

Correct Answer
verified

You recently identified a novel protein that contains several membrane-spanning domains.Which of amino acids would you expect to be most common in these domains?

Correct Answer
verified

Phospholipids are created with

Correct Answer
verified

The special molecules that have large structures and characteristically made by living organisms are known as ________.

Correct Answer
verified

You have recently identified a novel protein.After obtaining the protein sequence you realize that this protein contains several motifs and domains.How might this information help you to determine the function of your new protein?

Correct Answer
verified

Humans are unable to get metabolic energy from cellulose because

Correct Answer
verified

Relatively small organic molecules with a central carbon atom which is bonded to a carboxyl group,an amino group,a carbon containing group,and a hydrogen atom are called

Correct Answer
verified

Exam 3: The Chemical Building Blocks of Life

Correct AnswerverifiedShow Answer

Egg whites consist primarily of water and the protein albumin.When you fry an egg,why does the egg white turn from clear to white?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

__________ are polymers containing up to 20 different kinds of naturally occurring amino acids.

Correct AnswerverifiedShow Answer

Muscle contraction is accomplished by a mechanism known as the cross-bridge cycle,in which myosin heads bind to actin and cause the actin filaments to move across the myosin filaments.Which of the following is capable of providing the energy needed for this process?

Correct AnswerverifiedShow Answer

Which of the following is not a component of nucleic acids?

Correct AnswerverifiedShow Answer

All of the following are examples of monomer: polymer pairings except

Correct AnswerverifiedShow Answer

Proteins possess all of the following functions except

Correct AnswerverifiedShow Answer

This atom in its unbound state has four valent electrons.These electrons readily form single,double,and even triple bonds among themselves to become stable.This atom is

Correct AnswerverifiedShow Answer

Proteins are polymers formed of structural units called

Correct AnswerverifiedShow Answer

Functional groups found in amino acids include all of the following except

Correct AnswerverifiedShow Answer

A common lipid for energy storage is

Correct AnswerverifiedShow Answer

Which of the following is not a protein?

Correct AnswerverifiedShow Answer

DNA and RNA are similar in some respects and different in others.Which of the following statements is not accurate about their similarities?

Correct AnswerverifiedShow Answer

You recently identified a novel protein that contains several membrane-spanning domains.Which of amino acids would you expect to be most common in these domains?

Correct AnswerverifiedShow Answer

Phospholipids are created with

Correct AnswerverifiedShow Answer

The special molecules that have large structures and characteristically made by living organisms are known as ________.

Correct AnswerverifiedShow Answer

You have recently identified a novel protein.After obtaining the protein sequence you realize that this protein contains several motifs and domains.How might this information help you to determine the function of your new protein?

Correct AnswerverifiedShow Answer

Humans are unable to get metabolic energy from cellulose because

Correct AnswerverifiedShow Answer

Relatively small organic molecules with a central carbon atom which is bonded to a carboxyl group,an amino group,a carbon containing group,and a hydrogen atom are called

Correct AnswerverifiedShow Answer

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