Question 1

How many different tripeptides composed of three different amino acids can be formed if glycine,alanine,and valine are mixed together and peptide bonds are allowed to form in all possible combinations?

Accepted Answer

A)  2
B)  3
C)  4
D)  6
E)  8F) None of the above
G) A) and B)

Question 2

What molecular structure is shown below?

Accepted Answer

A)  Thymine
B)  Adenine
C)  Cytosine
D)  Uracil
E)  GuanineF) A) and B)
G) A) and C)

Question 3

Which of the following statements is/are correct?
i.Some waxes are esters of fatty acids with an alcohol portion that is a monohydroxyl alcohol with a long carbon chain
ii.Some waxes serve as a water-resistant coating on skin,fur,and feathers,but most waxes are structural
iii.The general structure for many waxes is that of an ether

Accepted Answer

A)  i only
B)  i and ii
C)  i and iii
D)  ii and iii
E)  i, ii, and iiiF) C) and D)
G) A) and C)

Question 4

Which of the following statements is/are incorrect?
i.Fats and oils are mainly esters of long-chain carboxylic acids
ii.Long-chain carboxylic acids are called oily acids
iii.The alcohol part of the ester in fats and oils comes from a dihydroxy alcohol

Accepted Answer

A)  i only
B)  ii only
C)  iii only
D)  i and ii
E)  ii and iiiF) A) and D)
G) C) and D)

Question 5

Which of the following bases is not found in DNA?

Accepted Answer

A)  Thymine
B)  Guanine
C)  Cytosine
D)  Uracil
E)  AdenineF) All of the above
G) None of the above

Question 6

Consider the induced fit model of enzyme activity.Which of the following statements about this model is false?

Accepted Answer

A)  The shape of the substrate is a close, but not exact, match to the shape of the active site of the enzyme.
B)  As the substrate binds to the enzyme, either or both molecules change shape slightly.
C)  The distortion of the shape of the substrate may be a factor in catalyzing the reaction.
D)  After the products are released, the enzyme returns to its original shape.
E)  The substrate and enzyme bind irreversibly.F) None of the above
G) C) and E)

Question 7

Which of the following is the best definition of the term lipid?

Accepted Answer

A)  A molecule made of two or more simpler sugar molecules
B)  A substance that is found in living organisms and is insoluble in water but soluble in nonpolar solvents
C)  A nucleic acid monomer
D)  A small molecule characterized by a carboxyl group at one end of the carbon chain and an amine group on the carbon next to the carboxyl group
E)  A catalyst that controls chemical reactions in a living systemF) None of the above
G) A) and B)

Question 8

Which of the following is the term used to describe the process where an appropriate DNA molecule makes a "photocopy" of the protein plan in the form of a complementary messenger RNA molecule?

Accepted Answer

A)  Mutation
B)  Translation
C)  Recombination
D)  Replication
E)  TranscriptionF) All of the above
G) None of the above

Question 9

Which of the following is the best definition of a protein's primary structure?

Accepted Answer

A)  The order of amino acids in the protein
B)  A description of the bends in the protein chain
C)  The local conformation of the backbone chain of the protein
D)  The arrangement of protein chains relative to one another.
E)  The number of peptide linkages between amino acids and a list of the R groupsF) C) and E)
G) A) and B)

Question 10

Which of the following is/are classified as (a) steroid(s) ?
i.Cholesterol
ii.Lecithin
iii.Lanolin

Accepted Answer

A)  i only
B)  ii only
C)  iii only
D)  i and iii
E)  i, ii, and iiiF) A) and E)
G) A) and D)

Question 11

Which of the following statements is correct?
i.Chemical reactions in a living system are each controlled by a catalyst called an enzyme.
ii.The substrate is the reactant that the enzyme helps convert to product.
iii.The catalytic properties of an enzyme exist at the site.

Accepted Answer

A)  i only
B)  ii only
C)  iii only
D)  i and ii
E)  All are correct statements.F) B) and C)
G) C) and D)

Question 12

In simple sugars,every carbon but one contains a hydroxyl group; the remaining carbon is double bonded to an oxygen atom as a carbonyl group.What type of sugar has the carbonyl group in the carbon chain?

Accepted Answer

A)  Kamalose
B)  Polysaccharide
C)  Disaccharide
D)  Aldose
E)  KetoseF) C) and D)
G) A) and B)

Question 13

How many different substrate molecules are normally catalyzed by a single enzyme?

Accepted Answer

A)  One
B)  Ten
C)  One hundred
D)  One million
E)  36 millionF) B) and D)
G) None of the above

Question 14

Which of the following base pairs are complementary?
i.AT
ii.AC
iii.GC
iv.AU
v.TG

Accepted Answer

A)  i and ii
B)  iii and iv
C)  i, iii, and iv
D)  ii, iv, and v
E)  i, ii, iii, and ivF) None of the above
G) A) and E)

Question 15

The polysaccharides cellulose,starch,and glycogen share a common monomer.What is that monomer?

Accepted Answer

A)  Lactose
B)  Sucrose
C)  Ribose
D)  Fructose
E)  GlucoseF) B) and C)
G) None of the above

Question 16

Which of the following is the best definition of the term amino acid?

Accepted Answer

A)  A carboxylic acid containing both an amine group and a variable alkyl group
B)  A substance that yields hydronium ions in aqueous solution
C)  A substance that donates protons in a chemical reaction
D)  A substance that forms covalent bonds by accepting a pair of electrons
E)  An organic acid containing the carboxyl group, having the general formula RCOOHF) B) and C)
G) A) and D)

Question 17

Which of the following carbohydrates are polysaccharides?
i.Sucrose
ii.Cellulose
iii.Starch
iv.Glycogen
v.Fructose

Accepted Answer

A)  i and ii
B)  i and v
C)  ii and iii
D)  ii, iii, and iv
E)  ii, iii, iv, and vF) A) and E)
G) A) and B)

Question 18

Consider the following general structure. 2-,this compound would be classified as: A) nonpolar, neutral B) polar, neutral C) polar, acidic D) polar, basic" class="answers-bank-image d-inline" rel="preload" > If the R group were HO-CH2-,this compound would be classified as:

Accepted Answer

A)  nonpolar, neutral
B)  polar, neutral
C)  polar, acidic
D)  polar, basicE) All of the above
F) C) and D)

Question 19

Which of the following does not correctly describes the structure of glucose?

Accepted Answer

A)  carbohydrate
B)  disaccharide
C)  aldose
D)  simple sugar
E)  has α and β formsF) A) and C)
G) B) and C)

Question 20

Consider the following general formula. 2-,combines with another molecule with an R group of HS-CH2-.Which of the following could correctly represent the product of this reaction? A) Ser-Cys B) Cys-Ser C) S-C D) C-S E) Any of the above are a possibility." class="answers-bank-image d-inline" rel="preload" > One molecule with an R group of HO-CH2-,combines with another molecule with an R group of HS-CH2-.Which of the following could correctly represent the product of this reaction?

Accepted Answer

A)  Ser-Cys
B)  Cys-Ser
C)  S-C
D)  C-S
E)  Any of the above are a possibility.F) A) and E)
G) A) and D)

Exam 22: Biochemistry

Correct Answer
verified

Which of the following statements is correct? i.Chemical reactions in a living system are each controlled by a catalyst called an enzyme. ii.The substrate is the reactant that the enzyme helps convert to product. iii.The catalytic properties of an enzyme exist at the site.

Correct Answer
verified

Which of the following is the best definition of the term amino acid?

Correct Answer
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What molecular structure is shown below?

Correct Answer
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Consider the following general formula. One molecule with an R group of HO-CH₂-,combines with another molecule with an R group of HS-CH₂-.Which of the following could correctly represent the product of this reaction?

Correct Answer
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How many different substrate molecules are normally catalyzed by a single enzyme?

Correct Answer
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Which of the following is the term used to describe the process where an appropriate DNA molecule makes a "photocopy" of the protein plan in the form of a complementary messenger RNA molecule?

Correct Answer
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Which of the following is/are classified as (a) steroid(s) ? i.Cholesterol ii.Lecithin iii.Lanolin

Correct Answer
verified

Consider the induced fit model of enzyme activity.Which of the following statements about this model is false?

Correct Answer
verified

Which of the following carbohydrates are polysaccharides? i.Sucrose ii.Cellulose iii.Starch iv.Glycogen v.Fructose

Correct Answer
verified

The polysaccharides cellulose,starch,and glycogen share a common monomer.What is that monomer?

Correct Answer
verified

How many different tripeptides composed of three different amino acids can be formed if glycine,alanine,and valine are mixed together and peptide bonds are allowed to form in all possible combinations?

Correct Answer
verified

Which of the following is the best definition of the term lipid?

Correct Answer
verified

Which of the following is the best definition of a protein's primary structure?

Correct Answer
verified

Consider the following general structure. If the R group were HO-CH₂-,this compound would be classified as:

Correct Answer
verified

In simple sugars,every carbon but one contains a hydroxyl group; the remaining carbon is double bonded to an oxygen atom as a carbonyl group.What type of sugar has the carbonyl group in the carbon chain?

Correct Answer
verified

Which of the following bases is not found in DNA?

Correct Answer
verified

Which of the following base pairs are complementary? i.AT ii.AC iii.GC iv.AU v.TG

Correct Answer
verified

Which of the following statements is/are incorrect? i.Fats and oils are mainly esters of long-chain carboxylic acids ii.Long-chain carboxylic acids are called oily acids iii.The alcohol part of the ester in fats and oils comes from a dihydroxy alcohol

Correct Answer
verified

Which of the following does not correctly describes the structure of glucose?

Correct Answer
verified

Exam 22: Biochemistry

Correct AnswerverifiedShow Answer

Which of the following statements is correct? i.Chemical reactions in a living system are each controlled by a catalyst called an enzyme. ii.The substrate is the reactant that the enzyme helps convert to product. iii.The catalytic properties of an enzyme exist at the site.

Correct AnswerverifiedShow Answer

Which of the following is the best definition of the term amino acid?

Correct AnswerverifiedShow Answer

What molecular structure is shown below?

Correct AnswerverifiedShow Answer

Consider the following general formula. One molecule with an R group of HO-CH2-,combines with another molecule with an R group of HS-CH2-.Which of the following could correctly represent the product of this reaction?

Correct AnswerverifiedShow Answer

How many different substrate molecules are normally catalyzed by a single enzyme?

Correct AnswerverifiedShow Answer

Which of the following is the term used to describe the process where an appropriate DNA molecule makes a "photocopy" of the protein plan in the form of a complementary messenger RNA molecule?

Correct AnswerverifiedShow Answer

Which of the following is/are classified as (a) steroid(s) ? i.Cholesterol ii.Lecithin iii.Lanolin

Correct AnswerverifiedShow Answer

Consider the induced fit model of enzyme activity.Which of the following statements about this model is false?

Correct AnswerverifiedShow Answer

Which of the following carbohydrates are polysaccharides? i.Sucrose ii.Cellulose iii.Starch iv.Glycogen v.Fructose

Correct AnswerverifiedShow Answer

The polysaccharides cellulose,starch,and glycogen share a common monomer.What is that monomer?

Correct AnswerverifiedShow Answer

How many different tripeptides composed of three different amino acids can be formed if glycine,alanine,and valine are mixed together and peptide bonds are allowed to form in all possible combinations?

Correct AnswerverifiedShow Answer

Which of the following is the best definition of the term lipid?

Correct AnswerverifiedShow Answer

Which of the following is the best definition of a protein's primary structure?

Correct AnswerverifiedShow Answer

Consider the following general structure. If the R group were HO-CH2-,this compound would be classified as:

Correct AnswerverifiedShow Answer

In simple sugars,every carbon but one contains a hydroxyl group; the remaining carbon is double bonded to an oxygen atom as a carbonyl group.What type of sugar has the carbonyl group in the carbon chain?

Correct AnswerverifiedShow Answer

Which of the following bases is not found in DNA?

Correct AnswerverifiedShow Answer

Which of the following base pairs are complementary? i.AT ii.AC iii.GC iv.AU v.TG

Correct AnswerverifiedShow Answer

Which of the following statements is/are incorrect? i.Fats and oils are mainly esters of long-chain carboxylic acids ii.Long-chain carboxylic acids are called oily acids iii.The alcohol part of the ester in fats and oils comes from a dihydroxy alcohol

Correct AnswerverifiedShow Answer

Which of the following does not correctly describes the structure of glucose?

Correct AnswerverifiedShow Answer

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Consider the following general formula. One molecule with an R group of HO-CH₂-,combines with another molecule with an R group of HS-CH₂-.Which of the following could correctly represent the product of this reaction?

Correct Answer
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Consider the following general structure. If the R group were HO-CH₂-,this compound would be classified as:

Correct Answer
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