Question 1

Chemical reactions that yield energy,such as heat,are said to be

Accepted Answer

A)  endergonic.
B)  activated.
C)  exergonic.
D)  neutral.
E)  thermonuclear.

Question 2

In an aqueous solution,cations are attracted toward

Accepted Answer

A)  sodium.
B)  salt.
C)  buffers.
D)  anions.
E)  hydrogen ions.

Question 3

In any given molecule,the sum of the atomic weights of its component atoms is called

Accepted Answer

A)  molecular mass.
B)  molecular weight.
C)  atomic mass.
D)  atomic weight.
E)  chemical mass.

Question 4

Glycoproteins and proteoglycans are combinations of amino acids and

Accepted Answer

A)  carbohydrates.
B)  fatty acids.
C)  lipids.
D)  nucleic acids.
E)  inorganic compounds.

Question 5

A high-energy bond in ATP is present between

Accepted Answer

A)  adenine and ribose.
B)  adenine and a phosphate group.
C)  the first and second phosphate group.
D)  the second and third phosphate group.
E)  phosphate groups 1 and 2 and between phosphate groups 2 and 3.

Question 6

Molecules that have the same molecular formula but different structural formulas are called

Accepted Answer

A)  isotopes.
B)  isomers.
C)  isozymes.
D)  isotypes.
E)  isomoles.

Question 7

A fatty acid that contains two or more double covalent bonds is said to be

Accepted Answer

A)  saturated.
B)  monounsaturated.
C)  polyunsaturated.
D)  hydrogenated.
E)  carboxylated.

Question 8

The center of an atom is called the

Accepted Answer

A)  core.
B)  hub.
C)  middle point.
D)  nucleus.
E)  focus.

Question 9

Identify the product formed from the phosphorylation of ADP.

Accepted Answer

A)  adenosine diphosphate
B)  adenine
C)  adenosine triphosphate
D)  deoxyribonucleic acid
E)  ribose

Question 10

You would expect a peptide bond to link

Accepted Answer

A)  two simple sugars.
B)  two amino acids.
C)  two nucleotides.
D)  a sugar and a peptide.
E)  a peptide and a fatty acid.

Question 11

The maximum rate of an enzyme reaction

Accepted Answer

A)  occurs during dehydration.
B)  occurs during hydrolysis.
C)  occurs during synthesis.
D)  is reversible.
E)  occurs at the saturation limit.

Question 12

The innermost electron shell in an atom holds up to ________ electrons.

Accepted Answer

A)  1
B)  2
C)  4
D)  6
E)  8

Question 13

Lipids that are produced by nearly every tissue in the body and act as local regulators are the

Accepted Answer

A)  prostaglandins.
B)  steroids.
C)  monoglycerides.
D)  phospholipids.
E)  glycolipids.

Question 14

Cholesterol,phospholipids,and glycolipids are examples of

Accepted Answer

A)  dietary fats.
B)  prostaglandins.
C)  structural lipids.
D)  lipid drugs.
E)  steroids.

Question 15

Interaction between individual polypeptide chains to form a protein complex is ________ structure.

Accepted Answer

A)  primary
B)  secondary
C)  tertiary
D)  quaternary
E)  pentagonal

Question 16

Which pH is closest to normal body pH?

Accepted Answer

A)  pH 7
B)  pH 8
C)  pH 4
D)  pH 3
E)  pH 2

Question 17

Ionic bonds are formed when

Accepted Answer

A)  atoms share electrons.
B)  an electron or electrons are completely transferred from one atom to another.
C)  a pair of electrons is shared unequally by two atoms.
D)  hydrogen forms bonds with negatively charged atoms.
E)  two or more atoms lose electrons at the same time.

Question 18

The formula for methane gas is CH₄.What does the formula 4CH₄ represent?

Accepted Answer

A)  a molecule with 4 carbon atoms
B)  a molecule with 4 carbon atoms and 16 hydrogen atoms
C)  4 molecules,each containing a carbon and a hydrogen atom
D)  4 molecules,each containing a carbon atom and 4 hydrogen atoms
E)  an inorganic compound with ionic bonds

Question 19

Kinetic energy is stored as ________ energy when a spring is stretched.

Accepted Answer

A)  potential
B)  possible
C)  plausible
D)  probable
E)  positive

Question 20

Oxygen (atomic number 8) requires how many additional electrons to fill its outer electron shell?

Accepted Answer

A)  1
B)  2
C)  4
D)  6
E)  8

Exam 2: The Chemical Level of Organization

Which pH is closest to normal body pH?

Correct AnswerverifiedShow Answer

In any given molecule,the sum of the atomic weights of its component atoms is called

Correct AnswerverifiedShow Answer

A fatty acid that contains two or more double covalent bonds is said to be

Correct AnswerverifiedShow Answer

The center of an atom is called the

Correct AnswerverifiedShow Answer

Kinetic energy is stored as ________ energy when a spring is stretched.

Correct AnswerverifiedShow Answer

The formula for methane gas is CH₄.What does the formula 4CH₄ represent?

Correct AnswerverifiedShow Answer

In an aqueous solution,cations are attracted toward

Correct AnswerverifiedShow Answer

Chemical reactions that yield energy,such as heat,are said to be

Correct AnswerverifiedShow Answer

Glycoproteins and proteoglycans are combinations of amino acids and

Correct AnswerverifiedShow Answer

Identify the product formed from the phosphorylation of ADP.

Correct AnswerverifiedShow Answer

Oxygen (atomic number 8) requires how many additional electrons to fill its outer electron shell?

Correct AnswerverifiedShow Answer

You would expect a peptide bond to link

Correct AnswerverifiedShow Answer

Lipids that are produced by nearly every tissue in the body and act as local regulators are the

Correct AnswerverifiedShow Answer

Ionic bonds are formed when

Correct AnswerverifiedShow Answer

Cholesterol,phospholipids,and glycolipids are examples of

Correct AnswerverifiedShow Answer

Interaction between individual polypeptide chains to form a protein complex is ________ structure.

Correct AnswerverifiedShow Answer

Molecules that have the same molecular formula but different structural formulas are called

Correct AnswerverifiedShow Answer

The maximum rate of an enzyme reaction

Correct AnswerverifiedShow Answer

A high-energy bond in ATP is present between

Correct AnswerverifiedShow Answer

The innermost electron shell in an atom holds up to ________ electrons.

Correct AnswerverifiedShow Answer

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