Question 1

Ionic compounds dissociate in water into:

Accepted Answer

A)   polar and nonpolar substances.
B)   hydrophilic and hydrophobic substances.
C)   acids and bases.
D)   electrolytes. D

Question 2

A solution containing equal number of hydrogen ions and hydroxide ions is:

Accepted Answer

A)   neutral.
B)   alkaline.
C)   acidic.
D)   basic.

Question 3

Like the carbohydrates, lipids have twice the hydrogen atoms as carbon and oxygen atoms in their molecular structures.

Accepted Answer

A) True 
 B)False

Question 4

What makes RNA a unique nucleic acid?

Accepted Answer

A)   RNA is composed of two strands held together by hydrogen bonds.
B)   RNA contains a sugar known as deoxyribose.
C)   RNA contains a nitrogenous base known as uracil.
D)   RNA is built from building blocks known as a nucleotide.

Question 5

An atom with an atomic number of 13 has satisfied the octet rule and is inert.

Accepted Answer

A) True 
 B)False

Question 6

Solutions with a pH less than 7 are considered basic or alkaline.

Accepted Answer

A) True 
 B)False

Question 7

Predict the type of chemical bond that may form between two nonmetals.

Accepted Answer

Covalent bonding occ...

Question 8

Which pH represents a solution that has the highest concentration of hydroxide ions?

Accepted Answer

A)   pH 1
B)   pH 10
C)   pH 14
D)   pH 7

Question 9

A long -lasting high fever is a concern for denaturation of:

Accepted Answer

A)   saturated fats.
B)   phospholipids.
C)   enzymes.
D)   glycogen.

Question 10

Salts are held together by:

Accepted Answer

A)   polar covalent bonds.
B)   nonpolar covalent bonds.
C)   single covalent bonds.
D)   ionic bonds.

Question 11

Hydrogen bonds are strong attractions between nonpolar covalent molecules.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following lipids stores the most energy in the fatty acid chains?

Accepted Answer

A)   monounsaturated fatty acid
B)   saturated fatty acid
C)   glycerol
D)   polyunsaturated fatty acid

Question 13

Dwain is drinking a cup of coffee which has a pH of 5. Compare Dwain's coffee to his friend's coffee which has a pH of 6.

Accepted Answer

Each single digit change on the pH scale corresponds to a 10 ^-fold change in hydrogen ion concentration. Dwain's coffee, with a pH of 5, is 10 times more acidic than his friend's coffee, with a pH of 6. The hydrogen ion concentration increases 10 ^-fold from a pH of 6 to a pH of 5.

Question 14

What type of bond is responsible for the surface tension of water?

Accepted Answer

A)   ionic bond
B)   nonpolar covalent bond
C)   hydrogen bond
D)   polar covalent bond

Question 15

In a solution, the solute dissolves the solvent.

Accepted Answer

A) True 
 B)False  False

Question 16

Describe the organization of the pH scale, including the locations of acids, bases, and neutral chemicals.

Accepted Answer

The pH scale ranges from 0 to 14. Acids ...

Question 17

Two or more atoms of different elements that are chemically bonded together are known as:

Accepted Answer

A)   compounds.
B)   ions.
C)   molecules.
D)   macromolecules.

Question 18

The alpha -helix and beta -pleated sheet are examples of:

Accepted Answer

A)   tertiary protein structure.
B)   primary protein structure.
C)   quaternary protein structure.
D)   secondary protein structure.

Question 19

The innermost shell of an atom holds:

Accepted Answer

A)   2 protons.
B)   6 electrons.
C)   8 electrons.
D)   2 electrons.

Question 20

What is the function of a buffer?

Accepted Answer

A)   Buffers absorb heat without changing temperature themselves.
B)   Buffers act as a lubricant between two adjacent surfaces.
C)   Buffers prevent large swings in pH when an acid or base is added to a solution.
D)   Buffers lower the activation energy of a chemical reaction.

Exam 2: The Chemistry of Life

Ionic compounds dissociate in water into:

Correct Answer
verified
D

A solution containing equal number of hydrogen ions and hydroxide ions is:

Correct Answer
verified

Like the carbohydrates, lipids have twice the hydrogen atoms as carbon and oxygen atoms in their molecular structures.

Correct Answer
verified

What makes RNA a unique nucleic acid?

Correct Answer
verified

An atom with an atomic number of 13 has satisfied the octet rule and is inert.

Correct Answer
verified

Solutions with a pH less than 7 are considered basic or alkaline.

Correct Answer
verified

Predict the type of chemical bond that may form between two nonmetals.

Correct Answer
verified
Covalent bonding occ...
View Answer

Which pH represents a solution that has the highest concentration of hydroxide ions?

Correct Answer
verified

A long ^-lasting high fever is a concern for denaturation of:

Correct Answer
verified

Salts are held together by:

Correct Answer
verified

Hydrogen bonds are strong attractions between nonpolar covalent molecules.

Correct Answer
verified

Which of the following lipids stores the most energy in the fatty acid chains?

Correct Answer
verified

Dwain is drinking a cup of coffee which has a pH of 5. Compare Dwain's coffee to his friend's coffee which has a pH of 6.

What type of bond is responsible for the surface tension of water?

Correct Answer
verified

In a solution, the solute dissolves the solvent.

Correct Answer
verified
False

Describe the organization of the pH scale, including the locations of acids, bases, and neutral chemicals.

Correct Answer
verified
The pH scale ranges from 0 to 14. Acids ...
View Answer

Two or more atoms of different elements that are chemically bonded together are known as:

Correct Answer
verified

The alpha ^-helix and beta ^-pleated sheet are examples of:

Correct Answer
verified

The innermost shell of an atom holds:

Correct Answer
verified

What is the function of a buffer?

Correct Answer
verified

Exam 2: The Chemistry of Life

Ionic compounds dissociate in water into:

Correct AnswerverifiedD

A solution containing equal number of hydrogen ions and hydroxide ions is:

Correct AnswerverifiedShow Answer

Like the carbohydrates, lipids have twice the hydrogen atoms as carbon and oxygen atoms in their molecular structures.

Correct AnswerverifiedShow Answer

What makes RNA a unique nucleic acid?

Correct AnswerverifiedShow Answer

An atom with an atomic number of 13 has satisfied the octet rule and is inert.

Correct AnswerverifiedShow Answer

Solutions with a pH less than 7 are considered basic or alkaline.

Correct AnswerverifiedShow Answer

Predict the type of chemical bond that may form between two nonmetals.

Correct AnswerverifiedCovalent bonding occ...View AnswerShow Answer

Which pH represents a solution that has the highest concentration of hydroxide ions?

Correct AnswerverifiedShow Answer

A long -lasting high fever is a concern for denaturation of:

Correct AnswerverifiedShow Answer

Salts are held together by:

Correct AnswerverifiedShow Answer

Hydrogen bonds are strong attractions between nonpolar covalent molecules.

Correct AnswerverifiedShow Answer

Which of the following lipids stores the most energy in the fatty acid chains?

Correct AnswerverifiedShow Answer

Dwain is drinking a cup of coffee which has a pH of 5. Compare Dwain's coffee to his friend's coffee which has a pH of 6.

What type of bond is responsible for the surface tension of water?

Correct AnswerverifiedShow Answer

In a solution, the solute dissolves the solvent.

Correct AnswerverifiedFalse

Describe the organization of the pH scale, including the locations of acids, bases, and neutral chemicals.

Correct AnswerverifiedThe pH scale ranges from 0 to 14. Acids ...View AnswerShow Answer

Two or more atoms of different elements that are chemically bonded together are known as:

Correct AnswerverifiedShow Answer

The alpha -helix and beta -pleated sheet are examples of:

Correct AnswerverifiedShow Answer

The innermost shell of an atom holds:

Correct AnswerverifiedShow Answer

What is the function of a buffer?

Correct AnswerverifiedShow Answer

Correct Answer
verified
D

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Covalent bonding occ...
View Answer

Correct Answer
verified

A long ^-lasting high fever is a concern for denaturation of:

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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False

Correct Answer
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The pH scale ranges from 0 to 14. Acids ...
View Answer

Correct Answer
verified

The alpha ^-helix and beta ^-pleated sheet are examples of:

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified