Question 1

The amount of energy (measured in calories) required to increase the temperature of 1 gram of a substance by 1 degree Celsius is known as ________.

Accepted Answer

The answer of The amount of energy (measured in calories)...

Question 2

Water and sodium chloride are examples of inorganic molecules.

Accepted Answer

A) True 
 B)False

Question 3

An emulsion is a combination of water and a nonpolar liquid that have been forcibly mixed.

Accepted Answer

A) True 
 B)False

Question 4

Nucleic acids are made up of

Accepted Answer

A)   nucleotides joined by covalent, phosphodiester bonds.
B)   nitrogenous bases joined by ionic, disulfide bonds.
C)   ribose sugars joined by intermolecular, hydrogen bonds.
D)   proteins and sugars joined by polar, covalent, double bonds.E) None of the above
F) A) and D)

Question 5

A charged amino acid tends to decrease a protein's solubility in water.

Accepted Answer

A) True 
 B)False

Question 6

Like most functional groups, carboxyl groups are

Accepted Answer

A)   nonpolar and therefore increase a biomolecule's solubility in water.
B)   nonpolar and therefore decrease a biomolecule's solubility in water.
C)   polar and therefore increase a biomolecule's solubility in water.
D)   polar and therefore decrease a biomolecule's solubility in water.E) All of the above
F) C) and D)

Question 7

The half-life of a radioisotope is at least one day and at most ten years.

Accepted Answer

A) True 
 B)False

Question 8

Which statement accurately describes how pH is related to denaturation?

Accepted Answer

A)   Either a large increase or a large decrease in pH can lead to denaturation.
B)   Neither a large increase nor a large decrease in pH can lead to denaturation.
C)   A large increase but not a large decrease in pH can lead to denaturation.
D)   A large decrease but not a large increase in pH can lead to denaturation.E) C) and D)
F) B) and D)

Question 9

A base is described as a proton donor.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is an accurate description of hydrocarbons?

Accepted Answer

A)   Most of them contain phosphorus.
B)   They are nonpolar molecules.
C)   Most of them contain sulfur.
D)   They are polar molecules.E) C) and D)
F) A) and D)

Question 11

Which statement accurately describes isomers?

Accepted Answer

A)   They possess differing numbers of neutrons in their nuclei.
B)   They have the same molecular shape but involve different elements.
C)   They have the same structural formula but different molecular formulas.
D)   They have the same molecular formula but different structural formulas.
E)   They have gained or lost electrons at their outer shell.F) B) and D)
G) C) and D)

Question 12

An individual water molecule contains ________ atoms and enters into ________ hydrogen bonds with other water molecules.

Accepted Answer

A)   two; two
B)   three; two
C)   three; three
D)   three; four
E)   three; sixF) None of the above
G) B) and E)

Question 13

The simple sugar glucose is an example of a

Accepted Answer

A)   monosaccharide.
B)   lipid.
C)   polysaccharide.
D)   polymer.
E)   glycogen.F) D) and E)
G) All of the above

Question 14

When diagramming an atom, the innermost shell is filled with ________ electrons.

Accepted Answer

A)   two
B)   six
C)   eight
D)   tenE) A) and B)
F) All of the above

Question 15

An individual hydrogen bond in a sample of water would be described as

Accepted Answer

A)   strong and intramolecular.
B)   strong and intermolecular.
C)   weak and intramolecular.
D)   weak and intermolecular.E) A) and D)
F) None of the above

Question 16

Molarity is measured in the units of moles solute/L solution.

Accepted Answer

A) True 
 B)False

Question 17

When two or more polypeptide chains come together to give a protein its ultimate shape, that structure is described as the ________ structure.

Accepted Answer

A)   micro-
B)   secondary
C)   quaternary
D)   tertiary
E)   heme groupF) None of the above
G) D) and E)

Question 18

If an element from the first column of the periodic table entered into a covalent bond with one from the sixth column, then the bond would be a

Accepted Answer

A)   polar bond, with the element from the first column developing a partial negative charge.
B)   polar bond, with the element from the sixth column developing a partial negative charge.
C)   nonpolar bond, with the element from the first column developing a partial positive charge.
D)   nonpolar bond, with the element from the sixth column developing a partial positive charge.
E)   nonpolar bond, with neither element developing any partial charges at all.F) B) and E)
G) B) and C)

Question 19

Which of the following has the smallest mass?

Accepted Answer

A)   An electron
B)   An atomic nucleus
C)   A proton
D)   A neutronE) C) and D)
F) None of the above

Question 20

The most common extracellular cation is ________.

Accepted Answer

The answer of The most common extracellular cation is ________....

Exam 2: Atoms, Ions, and Molecules

The half-life of a radioisotope is at least one day and at most ten years.

Correct AnswerverifiedShow Answer

If an element from the first column of the periodic table entered into a covalent bond with one from the sixth column, then the bond would be a

Correct AnswerverifiedShow Answer

An individual hydrogen bond in a sample of water would be described as

Correct AnswerverifiedShow Answer

Nucleic acids are made up of

Correct AnswerverifiedShow Answer

The amount of energy (measured in calories) required to increase the temperature of 1 gram of a substance by 1 degree Celsius is known as ________.

Correct AnswerverifiedShow Answer

Which statement accurately describes how pH is related to denaturation?

Correct AnswerverifiedShow Answer

The simple sugar glucose is an example of a

Correct AnswerverifiedShow Answer

Water and sodium chloride are examples of inorganic molecules.

Correct AnswerverifiedShow Answer

A base is described as a proton donor.

Correct AnswerverifiedShow Answer

An emulsion is a combination of water and a nonpolar liquid that have been forcibly mixed.

Correct AnswerverifiedShow Answer

Molarity is measured in the units of moles solute/L solution.

Correct AnswerverifiedShow Answer

Which statement accurately describes isomers?

Correct AnswerverifiedShow Answer

When two or more polypeptide chains come together to give a protein its ultimate shape, that structure is described as the ________ structure.

Correct AnswerverifiedShow Answer

An individual water molecule contains ________ atoms and enters into ________ hydrogen bonds with other water molecules.

Correct AnswerverifiedShow Answer

When diagramming an atom, the innermost shell is filled with ________ electrons.

Correct AnswerverifiedShow Answer

The most common extracellular cation is ________.

Correct AnswerverifiedShow Answer

Which of the following has the smallest mass?

Correct AnswerverifiedShow Answer

Which of the following is an accurate description of hydrocarbons?

Correct AnswerverifiedShow Answer

A charged amino acid tends to decrease a protein's solubility in water.

Correct AnswerverifiedShow Answer

Like most functional groups, carboxyl groups are

Correct AnswerverifiedShow Answer

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An individual water molecule contains atoms and enters into hydrogen bonds with other water molecules.

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