Question 1

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

Question 2

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

Question 3

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. 
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.

Question 4

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) 8 
A) 2 
B) 3 
C) 4 
D) 6 
E) 8

Question 5

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 system 
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 system

Question 6

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

Question 7

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 groups 
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 groups

Question 8

Consider the following general structure.   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, basic 
A) nonpolar, neutral 
B) polar, neutral 
C) polar, acidic 
D) polar, basic

Question 9

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) Ketose 
A) Kamalose 
B) Polysaccharide 
C) Disaccharide 
D) Aldose 
E) Ketose

Question 10

Which of the following bases is not found in DNA?

Accepted Answer

A) Thymine 
B) Guanine 
C) Cytosine 
D) Uracil 
E) Adenine 
A) Thymine 
B) Guanine 
C) Cytosine 
D) Uracil 
E) Adenine

Question 11

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

Question 12

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) Glucose 
A) Lactose 
B) Sucrose 
C) Ribose 
D) Fructose 
E) Glucose

Question 13

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

Question 14

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?

Accepted Answer

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

Question 15

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 million 
A) One 
B) Ten 
C) One hundred 
D) One million 
E) 36 million

Question 16

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) Transcription 
A) Mutation 
B) Translation 
C) Recombination 
D) Replication 
E) Transcription

Question 17

What molecular structure is shown below?

Accepted Answer

A) Thymine 
B) Adenine 
C) Cytosine 
D) Uracil 
E) Guanine 
A) Thymine 
B) Adenine 
C) Cytosine 
D) Uracil 
E) Guanine

Question 18

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

Question 19

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

Question 20

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 RCOOH 
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 RCOOH

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

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

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?

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

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

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

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

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?

Which of the following bases is not found in DNA?

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

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

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

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?

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

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?

What molecular structure is shown below?

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.

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

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

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

Organic Chemistry

Filters

Exam 22: Biochemistry

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

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

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?

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

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

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

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

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?

Which of the following bases is not found in DNA?

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

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

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

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?

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

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?

What molecular structure is shown below?

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.

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

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

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Chemical Equilibrium

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

Organic Chemistry

Filters

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

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?