Question 1

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

Accepted Answer

A) A molecule made of two or more simple sugar molecules 
B) A substance that is found in living organisms and is insoluble in water but soluble in nonpolar solvents 
C) A lipid having three cyclohexane rings and one cyclopentane ring 
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 simple sugar molecules 
B) A substance that is found in living organisms and is insoluble in water but soluble in nonpolar solvents 
C) A lipid having three cyclohexane rings and one cyclopentane ring 
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 E

Question 2

Which of the following make up the three major subclasses of lipids?
i.Amino acids and proteins
ii.Mono-,di-,and polysaccharides
iii.Fats,oils,and phospholipids
iv.Waxes
v.Steroids

Accepted Answer

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

Question 3

Which of the following bases is not found in RNA?

Accepted Answer

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

Question 4

Which of the following monosaccharides combine to make the disaccharide lactose?
i.glucose
ii.fructose
iii.ribose
iv.galactose

Accepted Answer

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

Question 5

Which of the following statements is/are incorrect?
i.Like fats,phospholipids are esters of glycerol
ii.A phospholipid has three fatty acid residues
iii.Phospholipids have a nonpolar head and long,polar tails

Accepted Answer

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

Question 6

Consider the following description:
"The bends and folds in the protein chain were stabilized by both
Disulfide bridges and hydrophobic interactions."
This is a description of which type of protein structure?

Accepted Answer

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

Question 7

If a substrate remains bound to an enzyme,that enzyme molecule is no longer a catalyst.What is the name of the irreversibly bound substrate?

Accepted Answer

A) Contaminant 
B) Inhibitor 
C) Decatalyzer 
D) Binder 
E) Hauer's substrate 
A) Contaminant 
B) Inhibitor 
C) Decatalyzer 
D) Binder 
E) Hauer's substrate

Question 8

Which of the following is the structural feature that characterizes a steroid?

Accepted Answer

A) A RCOOR' group 
B) A RCOR' group 
C) A cyclohexane ring 
D) A benzene ring and three cyclohexane rings fused 
E) A cyclopentane ring and three cyclohexane rings fused 
A) A RCOOR' group 
B) A RCOR' group 
C) A cyclohexane ring 
D) A benzene ring and three cyclohexane rings fused 
E) A cyclopentane ring and three cyclohexane rings fused

Question 9

Which of the following make up the three components of a nucleotide?
i.Nitrogen base
ii.Sugar
iii.Phosphate group
iv.Amino acid
v.Steroid

Accepted Answer

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

Question 10

Which of the following are the two types of nucleic acids in all living systems?
i.Deoxyribonucleic acid
ii.Gluconucleic acid
iii.Ribonucleic acid
iv.Fructonucleic acid

Accepted Answer

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

Question 11

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 at the end of the carbon chain?

Accepted Answer

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

Question 12

(i)are triacylglycerols that are solids at room temperature; (ii)are triacylglycerols that are liquids at room temperature.i ii

Accepted Answer

A) waxes fats 
B) waxes oils 
C) oils waxes 
D) fats oils 
E) oils fats 
A) waxes fats 
B) waxes oils 
C) oils waxes 
D) fats oils 
E) oils fats

Question 13

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

Accepted Answer

A) The class of polymeric molecules with molar masses from about 5,000 g/mole on up 
B) An amino acid polymer typically containing more than 40 amino acids 
C) A chemical compound formed by bonding two or more monomers 
D) A compound consisting of a carbonyl group bonded to a hydrogen on one side and a hydrogen, alkyl, or aryl group on the other 
E) A carboxylic acid containing both an amine group and a variable alkyl group 
A) The class of polymeric molecules with molar masses from about 5,000 g/mole on up 
B) An amino acid polymer typically containing more than 40 amino acids 
C) A chemical compound formed by bonding two or more monomers 
D) A compound consisting of a carbonyl group bonded to a hydrogen on one side and a hydrogen, alkyl, or aryl group on the other 
E) A carboxylic acid containing both an amine group and a variable alkyl group

Question 14

Which of the following is classified as a lipid?
i.fats
ii.oils
iii.waxes
iv.steroids

Accepted Answer

A) i only 
B) ii only 
C) iii only 
D) iv only 
E) All are lipids 
A) i only 
B) ii only 
C) iii only 
D) iv only 
E) All are lipids

Question 15

Which of the following is the term used to describe the process that results in two new DNA molecules? Each new DNA molecule is formed from one strand of the original DNA and one newly constructed complementary strand.

Accepted Answer

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

Question 16

Which of the following is the term used to describe the process by which the amino acid sequence in a protein molecule is constructed from information carried in messenger RNA?

Accepted Answer

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

Question 17

Which of the following is the best explanation of why the α-helix and the β-pleated sheet are the most stable protein conformations possible?

Accepted Answer

A) Both structures reflect a maximum amount of hydrogen bonding 
B) Their local conformations have amide bonds that can break and reform 
C) All of the amino acids polymerize, primarily those that are large and/or polar, to form an α-helix 
D) The secondary structure is strengthened by disulfide linkages 
E) The electrons in the nitrogen atoms in these structures exist in excited states 
A) Both structures reflect a maximum amount of hydrogen bonding 
B) Their local conformations have amide bonds that can break and reform 
C) All of the amino acids polymerize, primarily those that are large and/or polar, to form an α-helix 
D) The secondary structure is strengthened by disulfide linkages 
E) The electrons in the nitrogen atoms in these structures exist in excited states

Question 18

Consider the following amino acid structures:       glycine alanine serine Identify the C-terminal acid and the N-terminal acid in the following dipeptide:   C-terminal acid N-terminal acid

Accepted Answer

A) glycine alanine 
B) glycine serine 
C) alanine serine 
D) alanine glycine 
E) serine glycine 
A) glycine alanine 
B) glycine serine 
C) alanine serine 
D) alanine glycine 
E) serine glycine

Question 19

What is the name of the location that binds the enzyme's substrate during the reaction that follows?

Accepted Answer

A) Disulfide linkage 
B) Messenger RNA 
C) Substrate binding location 
D) Active site 
E) Skinner's linkage 
A) Disulfide linkage 
B) Messenger RNA 
C) Substrate binding location 
D) Active site 
E) Skinner's linkage

Question 20

Which of the following monosaccharides combine to make the disaccharide sucrose?
i.Glucose
ii.Fructose
iii.Ribose
iv.Galactose

Accepted Answer

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

Exam 22: Biochemistry

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

Which of the following make up the three major subclasses of lipids? i.Amino acids and proteins ii.Mono-,di-,and polysaccharides iii.Fats,oils,and phospholipids iv.Waxes v.Steroids

Which of the following bases is not found in RNA?

Which of the following monosaccharides combine to make the disaccharide lactose? i.glucose ii.fructose iii.ribose iv.galactose

Which of the following statements is/are incorrect? i.Like fats,phospholipids are esters of glycerol ii.A phospholipid has three fatty acid residues iii.Phospholipids have a nonpolar head and long,polar tails

Consider the following description: "The bends and folds in the protein chain were stabilized by both Disulfide bridges and hydrophobic interactions." This is a description of which type of protein structure?

If a substrate remains bound to an enzyme,that enzyme molecule is no longer a catalyst.What is the name of the irreversibly bound substrate?

Which of the following is the structural feature that characterizes a steroid?

Which of the following make up the three components of a nucleotide? i.Nitrogen base ii.Sugar iii.Phosphate group iv.Amino acid v.Steroid

Which of the following are the two types of nucleic acids in all living systems? i.Deoxyribonucleic acid ii.Gluconucleic acid iii.Ribonucleic acid iv.Fructonucleic acid

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 at the end of the carbon chain?

(i)are triacylglycerols that are solids at room temperature; (ii)are triacylglycerols that are liquids at room temperature.i ii

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

Which of the following is classified as a lipid? i.fats ii.oils iii.waxes iv.steroids

Which of the following is the term used to describe the process that results in two new DNA molecules? Each new DNA molecule is formed from one strand of the original DNA and one newly constructed complementary strand.

Which of the following is the term used to describe the process by which the amino acid sequence in a protein molecule is constructed from information carried in messenger RNA?

Which of the following is the best explanation of why the α-helix and the β-pleated sheet are the most stable protein conformations possible?

Consider the following amino acid structures: glycine alanine serine Identify the C-terminal acid and the N-terminal acid in the following dipeptide: C-terminal acid N-terminal acid

What is the name of the location that binds the enzyme's substrate during the reaction that follows?

Which of the following monosaccharides combine to make the disaccharide sucrose? i.Glucose ii.Fructose iii.Ribose iv.Galactose

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

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