Question 1

A(n) __________ is a group of atoms that determines many of the properties of an organic molecule.

Accepted Answer

A)  carboxyl group
B)  functional group
C)  hydroxyl group
D)  amino group
E)  phosphate groupF) B) and C)
G) A) and E)

Question 2

Which of these has the highest H+ concentration?

Accepted Answer

A)  Lemon juice, pH = 2.3
B)  Red wine, pH = 3.2
C)  Tomato juice, pH = 4.7
D)  Saliva, pH = 6.6
E)  Household ammonia, pH = 10.8F) A) and D)
G) D) and E)

Question 3

Which of these is the most appropriate to express the number of molecules per volume?

Accepted Answer

A)  Molarity
B)  Volume
C)  Percentage
D)  Weight per volume
E)  Milliequivalents per literF) A) and C)
G) A) and D)

Question 4

Which of the following is a disaccharide?

Accepted Answer

A)  Galactose
B)  Lactose
C)  Glucose
D)  Fructose
E)  AmyloseF) B) and E)
G) C) and E)

Question 5

Which of these molecules is hydrophobic?

Accepted Answer

A)  Glucose
B)  Cholesterol
C)  Amino acid
D)  Protein
E)  DisaccharideF) A) and B)
G) C) and E)

Question 6

The most relevant free energy in human physiology is the energy stored in __________.

Accepted Answer

A)  electrolytes ionized in water
B)  free radicals with an odd number of electrons
C)  radioisotopes
D)  the chemical bonds of organic molecules
E)  Van der Waals forcesF) A) and B)
G) All of the above

Question 7

When table salt,sodium chloride (NaCl) ,is placed in water __________.

Accepted Answer

A)  Na+ and Cl- form ionic bonds with each other
B)  Na+ and Cl- form polar covalent bonds with each other
C)  Na+ and Cl- form hydrogen bonds with water
D)  Ionic bonds between Na+ and Cl- are broken
E)  Na+ and Cl- become separated by their Van der Waals forcesF) B) and D)
G) A) and B)

Question 8

A solution that resists a change in pH when an acid or base is added to it is a(n) __________.

Accepted Answer

A)  buffer
B)  catalyst
C)  reducing agent
D)  oxidizing agent
E)  colloidF) All of the above
G) B) and D)

Question 9

Triglycerides consist of a 3-carbon compound called __________ bound to three __________.

Accepted Answer

A)  pyruvate; fatty acids
B)  lactic acid; glycerols
C)  eicosanoid; steroids
D)  glycerol; fatty acids
E)  sterol; fatty acidsF) B) and D)
G) C) and D)

Question 10

All enzymes are __________.

Accepted Answer

A)  cofactors
B)  proteins
C)  lipids
D)  carbohydrates
E)  nucleic acidsF) B) and D)
G) B) and C)

Question 11

A dipeptide is a molecule with two peptide bonds.

Accepted Answer

A) True 
 B)False

Question 12

A solution is a mixture of two or more substances that are physically blended but not chemically combined.

Accepted Answer

A) True 
 B)False

Question 13

Nucleic acids are __________ of __________.

Accepted Answer

A)  monomers; monosaccharides
B)  monomers; ATP
C)  polymers; nucleotides
D)  polymers; cAMP
E)  polymers; DNAF) A) and B)
G) A) and C)

Question 14

Potassium,sodium,and chlorine are trace elements.

Accepted Answer

A) True 
 B)False

Question 15

Na (atomic no.11) reacts with Cl (atomic no.17) to become stable.In the reaction,Na will ____________,while Cl will ____________.

Accepted Answer

A)  accept one electron; give up one electron
B)  give up one proton; accept one proton
C)  share one electron with chlorine; share one electron with sodium
D)  become an anion; become a cation
E)  give up one electron; accept one electronF) A) and B)
G) None of the above

Question 16

In general,__________ have a 2:1 ratio of hydrogen to oxygen.

Accepted Answer

A)  enzymes
B)  proteins
C)  lipids
D)  carbohydrates
E)  nucleic acidsF) A) and B)
G) B) and E)

Question 17

Table sugar is a disaccharide called __________ and is made up of the monomer(s) __________.

Accepted Answer

A)  maltose; glucose and sucrose
B)  sucrose; glucose and fructose
C)  lactose; glucose and galactose
D)  glycogen; glucose and fructose
E)  glucose; galactose and fructoseF) C) and D)
G) A) and D)

Question 18

Which of the following will increase the rate of a chemical reaction?

Accepted Answer

A)  An increase in reactant concentration
B)  An increase in product concentration
C)  A decreased temperature
D)  Enzyme inhibitionE) All of the above
F) A) and D)

Question 19

Oxygen has an atomic number of eight.When two oxygen atoms come together,they form a(n) __________ bond.

Accepted Answer

A)  hydrogen
B)  nonpolar covalent
C)  polar covalent
D)  ionic
E)  Van der WaalsF) C) and E)
G) C) and D)

Question 20

__________ is a monosaccharide,whereas __________ is a polysaccharide.

Accepted Answer

A)  Fructose; sucrose
B)  Galactose; maltose
C)  Lactose; glycogen
D)  Glucose; starch
E)  Cellulose; glucoseF) C) and D)
G) B) and E)

Exam 2: The Chemistry of Life

Which of the following is a disaccharide?

Correct AnswerverifiedShow Answer

Na (atomic no.11) reacts with Cl (atomic no.17) to become stable.In the reaction,Na will ____________,while Cl will ____________.

Correct AnswerverifiedShow Answer

Oxygen has an atomic number of eight.When two oxygen atoms come together,they form a(n) __________ bond.

Correct AnswerverifiedShow Answer

All enzymes are __________.

Correct AnswerverifiedShow Answer

Triglycerides consist of a 3-carbon compound called __________ bound to three __________.

Correct AnswerverifiedShow Answer

Nucleic acids are __________ of __________.

Correct AnswerverifiedShow Answer

A solution that resists a change in pH when an acid or base is added to it is a(n) __________.

Correct AnswerverifiedShow Answer

A dipeptide is a molecule with two peptide bonds.

Correct AnswerverifiedShow Answer

Which of these has the highest H+ concentration?

Correct AnswerverifiedShow Answer

A(n) __________ is a group of atoms that determines many of the properties of an organic molecule.

Correct AnswerverifiedShow Answer

Table sugar is a disaccharide called __________ and is made up of the monomer(s) __________.

Correct AnswerverifiedShow Answer

In general,__________ have a 2:1 ratio of hydrogen to oxygen.

Correct AnswerverifiedShow Answer

A solution is a mixture of two or more substances that are physically blended but not chemically combined.

Correct AnswerverifiedShow Answer

Which of these is the most appropriate to express the number of molecules per volume?

Correct AnswerverifiedShow Answer

__________ is a monosaccharide,whereas __________ is a polysaccharide.

Correct AnswerverifiedShow Answer

Potassium,sodium,and chlorine are trace elements.

Correct AnswerverifiedShow Answer

The most relevant free energy in human physiology is the energy stored in __________.

Correct AnswerverifiedShow Answer

When table salt,sodium chloride (NaCl) ,is placed in water __________.

Correct AnswerverifiedShow Answer

Which of the following will increase the rate of a chemical reaction?

Correct AnswerverifiedShow Answer

Which of these molecules is hydrophobic?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Na (atomic no.11) reacts with Cl (atomic no.17) to become stable.In the reaction,Na will ,while Cl will .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Triglycerides consist of a 3-carbon compound called bound to three .

Correct Answer
verified

Nucleic acids are of .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Which of these has the highest H⁺ concentration?

Correct Answer
verified

Correct Answer
verified

Table sugar is a disaccharide called and is made up of the monomer(s) .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

is a monosaccharide,whereas is a polysaccharide.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified