Question 1

Describe the factors that affect chemical reaction rates.

Accepted Answer

Temperature increases kinetic energy and...

Question 2

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.

Question 3

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 4

Chemical properties are determined primarily by neutrons.

Accepted Answer

A) True 
 B)False

Question 5

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.

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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 more

Question 8

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)  collagen

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

The single most abundant protein in the body is ________.

Accepted Answer

A)  hemoglobin
B)  collagen
C)  DNA
D)  glucose

Question 11

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 units

Question 12

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)

Question 13

Salts are always ________.

Accepted Answer

A)  double covalent compounds
B)  single covalent compounds
C)  ionic compounds
D)  hydrogen bonded

Question 14

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 15

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 neutrons

Question 16

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,oxygen

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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 reversible

Question 19

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 20

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)  2:1

Exam 2: Chemistry Comes Alive

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

Correct AnswerverifiedShow Answer

Which of the following does NOT characterize proteins?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is chemically inert (unreactive) ?

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

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

What does CH4 mean?

Correct AnswerverifiedShow Answer

Describe the factors that affect chemical reaction rates.

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

The single most abundant protein in the body is ________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What happens in redox reactions?

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Chemical properties are determined primarily by neutrons.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Salts are always ________.

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

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

Correct AnswerverifiedShow Answer

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Temperature increases kinetic energy and...
View Answer

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Cholesterol is produ...
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