Question 1

What happens in redox reactions?

Accepted Answer

A)  the electron acceptor is oxidized
B)  the organic substance that loses hydrogen is usually reduced
C)  both decomposition and electron exchange occur
D)  the reaction is uniformly reversibleE) B) and C)
F) A) and B)

Question 2

Which of the following does NOT characterize proteins?

Accepted Answer

A)  Their function depends on their three-dimensional shape.
B)  They may be denatured or coagulated by heat or acidity.
C)  They appear to be the molecular carriers of coded hereditary information.
D)  They have both functional and structural roles in the body.E) C) and D)
F) None of the above

Question 3

Tendons are strong,rope-like structures that connect skeletal muscle to bone.Which of the following proteins would provide strength to a tendon?

Accepted Answer

A)  albumin
B)  molecular chaperone
C)  actin
D)  collagenE) B) and D)
F) All of the above

Question 4

A chemical bond is an energy relationship between outer electrons and neighboring atoms.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is chemically inert (unreactive) ?

Accepted Answer

A)  carbon (atomic number 6) 
B)  oxygen (atomic number 8) 
C)  neon (atomic number 10) 
D)  sodium (atomic number 11) E) A) and C)
F) A) and D)

Question 6

The pH of body fluids must remain fairly constant for the body to maintain homeostasis.

Accepted Answer

A) True 
 B)False

Question 7

Mixtures are combinations of elements or compounds that are physically blended together but are not bound by chemical bonds.

Accepted Answer

A) True 
 B)False

Question 8

What is the ratio of fatty acids to glycerol in triglycerides (neutral fats) ?

Accepted Answer

A)  4:1
B)  3:1
C)  1:1
D)  2:1E) None of the above
F) B) and D)

Question 9

Describe the factors that affect chemical reaction rates.

Accepted Answer

Temperature increases kinetic energy and...

Question 10

An atom with an atomic number of 10 and a mass number of 24 would have ________.

Accepted Answer

A)  14 electrons
B)  14 neutrons
C)  24 protons
D)  10 neutronsE) C) and D)
F) A) and B)

Question 11

The four elements that make up about 96% of body weight are ________.

Accepted Answer

A)  carbon,oxygen,hydrogen,nitrogen
B)  carbon,oxygen,phosphorus,calcium
C)  nitrogen,hydrogen,calcium,sodium
D)  sodium,potassium,hydrogen,oxygenE) A) and B)
F) B) and C)

Question 12

Although his cholesterol levels were not high,Mr.Martinez read that cholesterol was bad for his health,so he eliminated all foods and food products containing this molecule.He later found that his cholesterol level dropped only 20%.Why did it not drop more?

Accepted Answer

Cholesterol is produ...

Question 13

The single most abundant protein in the body is ________.

Accepted Answer

A)  hemoglobin
B)  collagen
C)  DNA
D)  glucoseE) A) and B)
F) A) and C)

Question 14

Carbohydrates and proteins are built up from their basic building blocks by the ________.

Accepted Answer

A)  addition of a carbon atom between each two units
B)  removal of a water molecule between each two units
C)  addition of a water molecule between each two units
D)  removal of a carbon atom between each two unitsE) B) and C)
F) A) and B)

Question 15

What does CH4 mean?

Accepted Answer

A)  This is an inorganic molecule.
B)  This was involved in a redox reaction.
C)  There is one carbon and four hydrogen atoms.
D)  There are four carbon and four hydrogen atoms.E) B) and D)
F) B) and C)

Question 16

Chemical properties are determined primarily by neutrons.

Accepted Answer

A) True 
 B)False

Question 17

The atomic weight is an average of the relative weights (mass numbers)of all the isotopes of an element.

Accepted Answer

A) True 
 B)False

Question 18

Isotopes differ from each other only in the number of electrons the atom contains.

Accepted Answer

A) True 
 B)False

Question 19

An acid with a pH of 6 has ________ hydrogen ions than pure water.

Accepted Answer

A)  100-fold fewer
B)  10-fold more
C)  10-fold fewer
D)  100-fold moreE) None of the above
F) C) and D)

Question 20

Salts are always ________.

Accepted Answer

A)  double covalent compounds
B)  single covalent compounds
C)  ionic compounds
D)  hydrogen bondedE) A) and C)
F) A) and D)

Exam 2: Chemistry Comes Alive

Salts are always ________.

Correct AnswerverifiedShow Answer

The single most abundant protein in the body is ________.

Correct AnswerverifiedShow Answer

Tendons are strong,rope-like structures that connect skeletal muscle to bone.Which of the following proteins would provide strength to a tendon?

Correct AnswerverifiedShow Answer

The pH of body fluids must remain fairly constant for the body to maintain homeostasis.

Correct AnswerverifiedShow Answer

What is the ratio of fatty acids to glycerol in triglycerides (neutral fats) ?

Correct AnswerverifiedShow Answer

A chemical bond is an energy relationship between outer electrons and neighboring atoms.

Correct AnswerverifiedShow Answer

Mixtures are combinations of elements or compounds that are physically blended together but are not bound by chemical bonds.

Correct AnswerverifiedShow Answer

Carbohydrates and proteins are built up from their basic building blocks by the ________.

Correct AnswerverifiedShow Answer

Which of the following is chemically inert (unreactive) ?

Correct AnswerverifiedShow Answer

The atomic weight is an average of the relative weights (mass numbers)of all the isotopes of an element.

Correct AnswerverifiedShow Answer

What does CH4 mean?

Correct AnswerverifiedShow Answer

Chemical properties are determined primarily by neutrons.

Correct AnswerverifiedShow Answer

Describe the factors that affect chemical reaction rates.

Correct AnswerverifiedTemperature increases kinetic energy and...View AnswerShow Answer

An acid with a pH of 6 has ________ hydrogen ions than pure water.

Correct AnswerverifiedShow Answer

Although his cholesterol levels were not high,Mr.Martinez read that cholesterol was bad for his health,so he eliminated all foods and food products containing this molecule.He later found that his cholesterol level dropped only 20%.Why did it not drop more?

Correct AnswerverifiedCholesterol is produ...View AnswerShow Answer

An atom with an atomic number of 10 and a mass number of 24 would have ________.

Correct AnswerverifiedShow Answer

Isotopes differ from each other only in the number of electrons the atom contains.

Correct AnswerverifiedShow Answer

Which of the following does NOT characterize proteins?

Correct AnswerverifiedShow Answer

The four elements that make up about 96% of body weight are ________.

Correct AnswerverifiedShow Answer

What happens in redox reactions?

Correct AnswerverifiedShow Answer

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Temperature increases kinetic energy and...
View Answer

Correct Answer
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Cholesterol is produ...
View Answer

Correct Answer
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Correct Answer
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