Question 1

Anything that has mass and occupies space is considered to be ________.

Accepted Answer

The answer of Anything that has mass and occupies space...

Question 2

Which list contains all four types of amino acids?

Accepted Answer

A)   Ionic, covalent, hydrogen, and intramolecular
B)   Charged, polar, nonpolar, and those with special functions
C)   Glutamate, aspartate, arginine, and thymine
D)   Polar, nonpolar, ionic, and hydrophobicE) A) and B)
F) A) and C)

Question 3

When elements found in column VIA of the periodic table become ions, they usually have a charge of

Accepted Answer

A)   -2.
B)   -1.
C)   +1.
D)   +2.
E)   +3.F) A) and C)
G) C) and D)

Question 4

Intermolecular forces between nonpolar molecules are weaker attractions than covalent bonds.

Accepted Answer

A) True 
 B)False

Question 5

The molecular formula for bicarbonate ion is HCO3-. It is therefore a

Accepted Answer

A)   polyatomic anion.
B)   polyatomic cation.
C)   radioactive isotope.
D)   cationic compound.E) C) and D)
F) A) and B)

Question 6

In a water molecule, each oxygen can form up to ________ hydrogen bonds with other water molecules.

Accepted Answer

A)   2
B)   3
C)   4
D)   5E) A) and B)
F) None of the above

Question 7

The three parts making up a nucleotide are

Accepted Answer

A)   a purine, a pyrimidine, and a ribose sugar.
B)   a five-carbon sugar, a phosphate group, and a nitrogenous base.
C)   an adenine, a guanine, and a cytosine.
D)   a double helix, a single strand, and a chromosome.
E)   a phosphorous, a deoxygenated ribose, and an amino acid.F) C) and D)
G) A) and B)

Question 8

The three-dimensional shape of a protein is known as its primary structure.

Accepted Answer

A) True 
 B)False

Question 9

Positively charged ions are called cations.

Accepted Answer

A) True 
 B)False

Question 10

When a protein of 50 nanometers is mixed with water, the opaque result is called a(n)

Accepted Answer

A)   suspension.
B)   emulsion.
C)   solution.
D)   colloid.E) All of the above
F) B) and C)

Question 11

While a runner is in a marathon, his or her liver will have to free some stored energy to keep blood sugar levels adequate; the liver will liberate this energy by way of a process called

Accepted Answer

A)   dehydration synthesis.
B)   glycogensis.
C)   glycogenolysis.
D)   polysaccharide synthesis.
E)   dialysis.F) A) and E)
G) B) and E)

Question 12

When two atoms with very different electronegativity share electrons a polar covalent bond is formed.

Accepted Answer

A) True 
 B)False

Question 13

Oxygen is more electronegative than carbon.

Accepted Answer

A) True 
 B)False

Question 14

If an ionic compound formed between an element from the first column of the periodic table and another from the sixth column, you would expect the compound to include

Accepted Answer

A)   one atom from each of the two elements.
B)   one atom from the first-column element and two atoms from the sixth-column element.
C)   two atoms from the first-column element and one atom from the sixth-column element.
D)   three atoms from the first-column element and two from the sixth-column element.E) A) and B)
F) All of the above

Question 15

Hemoglobin in blood, collagen in tendons, and enzymes in the digestive system are all examples of

Accepted Answer

A)   proteins.
B)   lipids.
C)   amino acids.
D)   carbohydrates.
E)   catalysts.F) B) and D)
G) A) and D)

Question 16

Explain the attractive forces within and between molecules. In your answer, distinguish between polar and nonpolar bonds, and distinguish between single, double, and triple bonds. Also be sure to explain three types of intermolecular attractions.

Accepted Answer

A complete answer should describe the sh...

Question 17

Two atoms that differ only in the number of neutrons they contain are known as

Accepted Answer

A)   anions.
B)   isomers.
C)   isotopes.
D)   ions.E) None of the above
F) A) and D)

Question 18

Which of the following lists describes three of the main functions served by proteins?

Accepted Answer

A)   Waterproofing, energy storage, and transmission of the genetic code
B)   Cushioning of organs, thermal insulation, and establishing cell boundaries
C)   Catalysis of chemical reactions, body defenses, and movement
D)   Energy storage, body defenses, thermal insulationE) A) and C)
F) A) and B)

Question 19

In some proteins, an ionic bond may form between an amino acid with

Accepted Answer

A)   a positive R group and an amino acid with a negative R group.
B)   a negative R group and a nonpolar amino acid.
C)   a sulfhydryl group and an amino acid with an amine group.
D)   a carboxyl group and an amino acid with a C-terminal.
E)   a glycine and another with a tryptophan.F) C) and E)
G) A) and B)

Question 20

C6H12O6 is an example of a ________ formula.

Accepted Answer

A)   molecular
B)   structuralC) A) and B)
D) undefined

Exam 2: Atoms, Ions, and Molecules

When two atoms with very different electronegativity share electrons a polar covalent bond is formed.

Correct AnswerverifiedShow Answer

Explain the attractive forces within and between molecules. In your answer, distinguish between polar and nonpolar bonds, and distinguish between single, double, and triple bonds. Also be sure to explain three types of intermolecular attractions.

Correct AnswerverifiedA complete answer should describe the sh...View AnswerShow Answer

Which list contains all four types of amino acids?

Correct AnswerverifiedShow Answer

The three parts making up a nucleotide are

Correct AnswerverifiedShow Answer

In a water molecule, each oxygen can form up to ________ hydrogen bonds with other water molecules.

Correct AnswerverifiedShow Answer

Which of the following lists describes three of the main functions served by proteins?

Correct AnswerverifiedShow Answer

While a runner is in a marathon, his or her liver will have to free some stored energy to keep blood sugar levels adequate; the liver will liberate this energy by way of a process called

Correct AnswerverifiedShow Answer

The molecular formula for bicarbonate ion is HCO3-. It is therefore a

Correct AnswerverifiedShow Answer

Positively charged ions are called cations.

Correct AnswerverifiedShow Answer

When a protein of 50 nanometers is mixed with water, the opaque result is called a(n)

Correct AnswerverifiedShow Answer

Hemoglobin in blood, collagen in tendons, and enzymes in the digestive system are all examples of

Correct AnswerverifiedShow Answer

In some proteins, an ionic bond may form between an amino acid with

Correct AnswerverifiedShow Answer

Two atoms that differ only in the number of neutrons they contain are known as

Correct AnswerverifiedShow Answer

Intermolecular forces between nonpolar molecules are weaker attractions than covalent bonds.

Correct AnswerverifiedShow Answer

C6H12O6 is an example of a ________ formula.

Correct AnswerverifiedShow Answer

If an ionic compound formed between an element from the first column of the periodic table and another from the sixth column, you would expect the compound to include

Correct AnswerverifiedShow Answer

Oxygen is more electronegative than carbon.

Correct AnswerverifiedShow Answer

The three-dimensional shape of a protein is known as its primary structure.

Correct AnswerverifiedShow Answer

Anything that has mass and occupies space is considered to be ________.

Correct AnswerverifiedShow Answer

When elements found in column VIA of the periodic table become ions, they usually have a charge of

Correct AnswerverifiedShow Answer

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A complete answer should describe the sh...
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The molecular formula for bicarbonate ion is HCO₃^-. It is therefore a

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C₆H₁₂O₆ is an example of a ________ formula.

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