Question 1

The opposite of a decomposition reaction is called a ________ reaction.

Accepted Answer

The answer of The opposite of a decomposition reaction is...

Question 2

Certain cellular organelles use oxygen to release energy from glucose.

Accepted Answer

A) True 
 B)False

Question 3

Proteins include DNA and RNA.

Accepted Answer

A) True 
 B)False

Question 4

Water,salts,oxygen and proteins are all examples of inorganic substances.

Accepted Answer

A) True 
 B)False

Question 5

When atoms form bonds by sharing electrons,the bond formed is a type of ________ bond.

Accepted Answer

A)   ionic
B)   covalent
C)   van der Waals
D)   hydrogenE) B) and C)
F) None of the above

Question 6

If solution A has a pH of 6 and solution B has a pH of 3,then ________.

Accepted Answer

A)   solution B has 3 times more H+ than A
B)   solution B has 3 times less H+ than A
C)   solution B has 30 times more H+ than A
D)   solution B has 1000 times more H+ than A
E)   solution B has 1000 times less H+ than AF) A) and E)
G) B) and E)

Question 7

Collectively,these bonds are responsible for the surface tension of water,but individually they are weak bonds.

Accepted Answer

A)   ionic
B)   covalent
C)   hydrogen
D)   peptide
E)   disulfideF) D) and E)
G) All of the above

Question 8

Buffers combine with hydrogen ions when H+ is in excess or they donate hydroxide ions when H+ is depleted.

Accepted Answer

A) True 
 B)False

Question 9

Atoms of different elements vary in size,weight and ways they interact with atoms or different elements.

Accepted Answer

A) True 
 B)False

Question 10

An ________ is defined as a substance that ionizes in water.

Accepted Answer

The answer of An ________ is defined as a substance...

Question 11

Which of the following chemicals is NOT an inorganic substance?

Accepted Answer

A)   water
B)   protein
C)   sodium chloride
D)   carbon dioxide
E)   oxygenF) A) and B)
G) B) and C)

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

________ are chemicals that resist pH changes.

Accepted Answer

The answer of ________ are chemicals that resist pH changes....

Question 14

A solution that contains more hydrogen ions than hydroxide ions is _________.

Accepted Answer

The answer of A solution that contains more hydrogen ions...

Question 15

Which of the following substances is NOT an element?

Accepted Answer

A)   iron
B)   oxygen
C)   water
D)   carbon
E)   hydrogenF) A) and B)
G) A) and C)

Question 16

Which elements make up 95% (by weight) of the human body?

Accepted Answer

A)   carbon,hydrogen,oxygen,nitrogen
B)   carbon,hydrogen,oxygen,calcium
C)   carbon,hydrogen,calcium,nitrogen
D)   carbon,hydrogen,selenium,sodium
E)   sodium,calcium,nitrogen,seleniumF) A) and E)
G) A) and D)

Question 17

A molecular formula represents the numbers and types of atoms in a molecule.

Accepted Answer

A) True 
 B)False

Question 18

________ are the building blocks of nucleic acids.

Accepted Answer

The answer of ________ are the building blocks of nucleic...

Question 19

The chemical behavior of atoms results from interactions among their _________.

Accepted Answer

The answer of The chemical behavior of atoms results from...

Question 20

The atomic weight of an atom of an element equals the number of neutrons in its nucleus.

Accepted Answer

A) True 
 B)False

Exam 2: Chemical Basis of Life

The opposite of a decomposition reaction is called a ________ reaction.

Correct AnswerverifiedShow Answer

Atoms of different elements vary in size,weight and ways they interact with atoms or different elements.

Correct AnswerverifiedShow Answer

Proteins include DNA and RNA.

Correct AnswerverifiedShow Answer

Which of the following substances is NOT an element?

Correct AnswerverifiedShow Answer

When atoms form bonds by sharing electrons,the bond formed is a type of ________ bond.

Correct AnswerverifiedShow Answer

Buffers combine with hydrogen ions when H+ is in excess or they donate hydroxide ions when H+ is depleted.

Correct AnswerverifiedShow Answer

Water,salts,oxygen and proteins are all examples of inorganic substances.

Correct AnswerverifiedShow Answer

A solution that contains more hydrogen ions than hydroxide ions is _________.

Correct AnswerverifiedShow Answer

Collectively,these bonds are responsible for the surface tension of water,but individually they are weak bonds.

Correct AnswerverifiedShow Answer

A molecular formula represents the numbers and types of atoms in a molecule.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which elements make up 95% (by weight) of the human body?

Correct AnswerverifiedShow Answer

If solution A has a pH of 6 and solution B has a pH of 3,then ________.

Correct AnswerverifiedShow Answer

An ________ is defined as a substance that ionizes in water.

Correct AnswerverifiedShow Answer

The atomic weight of an atom of an element equals the number of neutrons in its nucleus.

Correct AnswerverifiedShow Answer

________ are chemicals that resist pH changes.

Correct AnswerverifiedShow Answer

The chemical behavior of atoms results from interactions among their _________.

Correct AnswerverifiedShow Answer

Certain cellular organelles use oxygen to release energy from glucose.

Correct AnswerverifiedShow Answer

Which of the following chemicals is NOT an inorganic substance?

Correct AnswerverifiedShow Answer

________ are the building blocks of nucleic acids.

Correct AnswerverifiedShow Answer

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Buffers combine with hydrogen ions when H⁺ is in excess or they donate hydroxide ions when H⁺ isdepleted.

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