Question 1

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 2

Blood has a very narrow normal pH range but urine has a very broad normal pH range.What does that indicate about the physiology of pH?

Accepted Answer

Homeostasis requires that the pH of body...

Question 3

Muscle proteins are destroyed after 17 days and then replaced.This is an example of

Accepted Answer

A)  metabolic turnover.
B)  surveillance.
C)  surface tension.
D)  disease.
E)  specificity.

Question 4

A(n)________ is a homogeneous mixture containing a solvent and a solute.

Accepted Answer

The answer of A(n)________ is a homogeneous mixture containing a...

Question 5

AB → A + B is to decomposition as A + B → AB is to

Accepted Answer

A)  exchange.
B)  synthesis.
C)  combustion.
D)  replacement.
E)  metabolism.

Question 6

Substrate molecules bind to enzymes at the ________ sites.

Accepted Answer

A)  amino
B)  active
C)  carboxyl
D)  reactant
E)  neutral

Question 7

The group of organic compounds containing carbon,hydrogen,and oxygen in a near 1:2:1 ratio is defined as a

Accepted Answer

A)  carbohydrate.
B)  lipid.
C)  protein.
D)  nucleic acid.
E)  saturated fat.

Question 8

The element sulfur has an atomic number of 16 and mass number of 32.How many neutrons are in the nucleus of a sulfur atom? If sulfur forms covalent bonds with hydrogen,how many hydrogen atoms can bond to one sulfur atom?

Accepted Answer

The number of neutrons in an atom is equ...

Question 9

Ions with a + charge are called

Accepted Answer

A)  cations.
B)  anions.
C)  radicals.
D)  positrons.
E)  isotopes.

Question 10

Which of the following statements about hydrogen bonds is false?

Accepted Answer

A)  Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms.
B)  Hydrogen bonds can occur within a single molecule.
C)  Hydrogen bonds can form between neighboring molecules.
D)  Hydrogen bonds are important for holding large molecules together.
E)  Hydrogen bonds are responsible for many of the properties of water.

Question 11

Which element commonly has only a proton as its nucleus?

Accepted Answer

A)  helium
B)  neon
C)  argon
D)  hydrogen
E)  carbon

Question 12

Lipids are composed of fatty acids and

Accepted Answer

A)  glycerol.
B)  amino acids.
C)  sugars.
D)  monosaccharides.
E)  polypeptides.

Question 13

A polysaccharide that is formed in liver and muscle cells to store glucose is

Accepted Answer

A)  lactose.
B)  cellulose.
C)  glycogen.
D)  sucrose.
E)  fructose.

Question 14

A shortage of steroids in the body would result in a shortage of

Accepted Answer

A)  sex hormones.
B)  proteins.
C)  plasma membranes.
D)  glycogen.
E)  sex hormones and plasma membranes.

Question 15

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 16

The three structural components of a nucleotide are a pentose,a phosphate group,and a _______ base.

Accepted Answer

The answer of The three structural components of a nucleotide...

Question 17

Electrons whirl around the center of the atom at high speed,forming a(n)________.

Accepted Answer

The answer of Electrons whirl around the center of the...

Question 18

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

Question 19

Which of the following is the symbol for an amino group?

Accepted Answer

A)  -COOH
B)  -PO₃
C)  -NH₂
D)  -AMO
E)  -OH

Question 20

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

Exam 2: The Chemical Level of Organization

Identify the product formed from the phosphorylation of ADP.

Correct AnswerverifiedShow Answer

AB → A + B is to decomposition as A + B → AB is to

Correct AnswerverifiedShow Answer

Which element commonly has only a proton as its nucleus?

Correct AnswerverifiedShow Answer

Ions with a + charge are called

Correct AnswerverifiedShow Answer

Which of the following statements about hydrogen bonds is false?

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A shortage of steroids in the body would result in a shortage of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Muscle proteins are destroyed after 17 days and then replaced.This is an example of

Correct AnswerverifiedShow Answer

Which of the following is the symbol for an amino group?

Correct AnswerverifiedShow Answer

The element sulfur has an atomic number of 16 and mass number of 32.How many neutrons are in the nucleus of a sulfur atom? If sulfur forms covalent bonds with hydrogen,how many hydrogen atoms can bond to one sulfur atom?

Correct AnswerverifiedThe number of neutrons in an atom is equ...View AnswerShow Answer

The group of organic compounds containing carbon,hydrogen,and oxygen in a near 1:2:1 ratio is defined as a

Correct AnswerverifiedShow Answer

Blood has a very narrow normal pH range but urine has a very broad normal pH range.What does that indicate about the physiology of pH?

Correct AnswerverifiedHomeostasis requires that the pH of body...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Lipids are composed of fatty acids and

Correct AnswerverifiedShow Answer

A(n)________ is a homogeneous mixture containing a solvent and a solute.

Correct AnswerverifiedShow Answer

The three structural components of a nucleotide are a pentose,a phosphate group,and a _______ base.

Correct AnswerverifiedShow Answer

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

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Electrons whirl around the center of the atom at high speed,forming a(n)________.

Correct AnswerverifiedShow Answer

Substrate molecules bind to enzymes at the ________ sites.

Correct AnswerverifiedShow Answer

A polysaccharide that is formed in liver and muscle cells to store glucose is

Correct AnswerverifiedShow Answer

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The number of neutrons in an atom is equ...
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Homeostasis requires that the pH of body...
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