Question 1

What is meant by the denaturation of a protein?

Accepted Answer

A)   Amino acids are removed from the original polypeptide chain, leading to denaturation.
B)   Additional carboxyl groups bind to the ends of the polypeptide chain, leading to denaturation.
C)   Hydrogen bonds between regions of the polypeptide chain are broken, leading to denaturation.
D)   Larger amino acids such as phenylalanine are replaced with smaller amino acids such as cysteine, leading to denaturation.E) B) and C)
F) None of the above

Question 2

Solution A has a pH of 6 and Solution B has a pH of 3. Which statement is correct?

Accepted Answer

A)   Solution B has 3 times more H + than Solution A.
B)   Solution B has 3 times less H + than Solution A.
C)   Solution B has 30 times more H + than Solution A.
D)   Solution B has 1000 times more H + than Solution A.
E)   Solution B has 1000 times less H + than Solution A.F) A) and E)
G) B) and E)

Question 3

What type of chemical bonds are, individually, relatively weak but, collectively, are strong enough to be responsible for the surface tension of water?

Accepted Answer

A)   Ionic bonds
B)   Polar covalent bonds
C)   Hydrogen bonds
D)   Nonpolar covalent bondsE) A) and B)
F) A) and C)

Question 4

The term ____________ is defined as anything that has weight and takes up space.

Accepted Answer

The answer of The term ____________ is defined as anything...

Question 5

An acid is defined as an electrolyte that releases hydroxide ions (OH -) in water.

Accepted Answer

A) True 
 B)False

Question 6

Protons are the particles within an atom that determine the atom's bonding behavior.

Accepted Answer

A) True 
 B)False

Question 7

Matter is anything that has weight and takes up space.

Accepted Answer

A) True 
 B)False

Question 8

Protons are located in the __________ of an atom and they have an electrical charge that is __________.

Accepted Answer

A)   nucleus; negative
B)   nucleus; neutral
C)   shells; negative
D)   nucleus; positive
E)   shells; neutralF) D) and E)
G) C) and D)

Question 9

Atoms that lose or gain electrons become electrically charged particles called __________.

Accepted Answer

A)   ions
B)   molecules
C)   protons
D)   isotopesE) B) and D)
F) None of the above

Question 10

What blood pH is associated with the condition called alkalosis?

Accepted Answer

A)   Blood pH between 7.35 and 7.45
B)   Blood pH below 7.0
C)   Blood pH above 7.45
D)   Blood pH below 7.35E) A) and B)
F) All of the above

Question 11

During an exchange reaction, the bonds of a reactant molecule break so that simpler molecules, atoms, or ions are formed.

Accepted Answer

A) True 
 B)False

Question 12

An atom of oxygen has an atomic weight of 8. Its isotope with an atomic weight of 15 would have __________ neutrons in its nucleus.

Accepted Answer

A)   5
B)   7
C)   8
D)   15E) A) and B)
F) A) and C)

Question 13

Each whole number on the pH scale represents a __________-fold difference in hydrogen ion concentration.

Accepted Answer

A)   2
B)   10
C)   15
D)   20
E)   100F) B) and E)
G) C) and D)

Question 14

Describe carbon dioxide.

Accepted Answer

A)   It is inhaled in large quantities from the environment.
B)   It is a waste product of metabolic processes.
C)   It is an element.
D)   It is a salt.
E)   It is an electrolyte.F) None of the above
G) B) and C)

Question 15

The primary function of the type of lipid called __________ is to store energy for cellular activities.

Accepted Answer

The answer of The primary function of the type of...

Question 16

Overall, the electrical charge of a nucleus of an atom is always __________.

Accepted Answer

A)   neutral
B)   positive
C)   negativeD) All of the above
E) B) and C)

Question 17

The term __________ is defined as the amount of matter, while the term __________ refers to the gravitational pull on the matter.

Accepted Answer

A)   mass; weight
B)   weight; massC) A) and B)
D) undefined

Question 18

The simplest examples of matter are the __________, each of which has specific chemical properties that differentiate them from all others.

Accepted Answer

The answer of The simplest examples of matter are the...

Question 19

The molecular formula for compounds like sodium chloride (NaCl) indicate the relative amounts of each element present.

Accepted Answer

A) True 
 B)False

Question 20

When unstable isotopes decompose, they release __________ in the form of energy or atomic fragments.

Accepted Answer

The answer of When unstable isotopes decompose, they release __________...

Exam 2: Chemical Basis of Life

The term ____________ is defined as anything that has weight and takes up space.

Correct AnswerverifiedShow Answer

When unstable isotopes decompose, they release __________ in the form of energy or atomic fragments.

Correct AnswerverifiedShow Answer

What blood pH is associated with the condition called alkalosis?

Correct AnswerverifiedShow Answer

The simplest examples of matter are the __________, each of which has specific chemical properties that differentiate them from all others.

Correct AnswerverifiedShow Answer

An atom of oxygen has an atomic weight of 8. Its isotope with an atomic weight of 15 would have __________ neutrons in its nucleus.

Correct AnswerverifiedShow Answer

Matter is anything that has weight and takes up space.

Correct AnswerverifiedShow Answer

What is meant by the denaturation of a protein?

Correct AnswerverifiedShow Answer

The primary function of the type of lipid called __________ is to store energy for cellular activities.

Correct AnswerverifiedShow Answer

Protons are the particles within an atom that determine the atom's bonding behavior.

Correct AnswerverifiedShow Answer

Protons are located in the __________ of an atom and they have an electrical charge that is __________.

Correct AnswerverifiedShow Answer

An acid is defined as an electrolyte that releases hydroxide ions (OH -) in water.

Correct AnswerverifiedShow Answer

Atoms that lose or gain electrons become electrically charged particles called __________.

Correct AnswerverifiedShow Answer

Overall, the electrical charge of a nucleus of an atom is always __________.

Correct AnswerverifiedShow Answer

The term __________ is defined as the amount of matter, while the term __________ refers to the gravitational pull on the matter.

Correct AnswerverifiedShow Answer

Describe carbon dioxide.

Correct AnswerverifiedShow Answer

Each whole number on the pH scale represents a __________-fold difference in hydrogen ion concentration.

Correct AnswerverifiedShow Answer

During an exchange reaction, the bonds of a reactant molecule break so that simpler molecules, atoms, or ions are formed.

Correct AnswerverifiedShow Answer

The molecular formula for compounds like sodium chloride (NaCl) indicate the relative amounts of each element present.

Correct AnswerverifiedShow Answer

Solution A has a pH of 6 and Solution B has a pH of 3. Which statement is correct?

Correct AnswerverifiedShow Answer

What type of chemical bonds are, individually, relatively weak but, collectively, are strong enough to be responsible for the surface tension of water?

Correct AnswerverifiedShow Answer

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Protons are located in the of an atom and they have an electrical charge that is .

Correct Answer
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An acid is defined as an electrolyte that releases hydroxide ions (OH ^-) in water.

Correct Answer
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The term is defined as the amount of matter, while the term refers to the gravitational pull on the matter.

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