Question 1

Fructose is

Accepted Answer

A)  a hexose.
B)  an isomer of glucose.
C)  found in male reproductive fluids.
D)  a carbohydrate.
E)  All of the answers are correct.

Question 2

Many lipids are composed of fatty acids and

Accepted Answer

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

Question 3

Artificial sweeteners

Accepted Answer

A)  are naturally similar to sugars.
B)  are always some form of carbohydrate.
C)  are usually not broken down by the body.
D)  are inorganic sugar substitutes.
E)  provide the same number of calories as an equivalent amount of sucrose.

Question 4

The pyrimidine bases found in DNA are ________ and cytosine.

Accepted Answer

A)  cytosine
B)  adenine
C)  thymine
D)  uracil
E)  niacin

Question 5

Molecules that store and process genetic information are the

Accepted Answer

A)  proteins.
B)  nucleic acids.
C)  carbohydrates.
D)  lipids.
E)  steroids.

Question 6

Molecules that do not readily interact with water are called

Accepted Answer

A)  inert.
B)  stable.
C)  hydrophobic.
D)  unstable.
E)  hydrophilic.

Question 7

The molecule DNA contains a five-carbon sugar called

Accepted Answer

A)  glucose.
B)  fructose.
C)  maltose.
D)  ribose.
E)  deoxyribose.

Question 8

The hydrolysis of ATP yields ADP,phosphate ion,and

Accepted Answer

A)  AMP.
B)  H2O.
C)  energy.
D)  adenosine
E)  nuclease.

Question 9

An amino acid is to a protein as a ________ is to a nucleic acid.

Accepted Answer

A)  purine
B)  nucleotide
C)  protein
D)  proton
E)  neutron

Question 10

If an isotope of oxygen has 8 protons,10 neutrons,and 8 electrons,its mass number is

Accepted Answer

A)  26.
B)  16.
C)  18.
D)  8) 
E)  12.

Question 11

A dust particle floating on a water surface illustrates

Accepted Answer

A)  surface tension.
B)  chemical tension.
C)  static electricity.
D)  heat capacity.
E)  hydrophilic attraction.

Question 12

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

Accepted Answer

A)  nucleic
B)  hydrophilic
C)  hydrochloric
D)  nitrogenous
E)  sulfuric

Question 13

A solution containing equal numbers of hydrogen ions and hydroxide ions is

Accepted Answer

A)  acidic.
B)  basic.
C)  neutral.
D)  alkaline.
E)  in equilibrium.

Question 14

During ionization,water molecules disrupt the ionic bonds of a salt to produce a mixture of ions.These ions can carry a current and so are called

Accepted Answer

A)  cations.
B)  anions.
C)  acids.
D)  electrolytes.
E)  counterions.

Question 15

The molecule CO₂ is known as

Accepted Answer

A)  carbonized oxygen.
B)  carbonated oxygen.
C)  carbon monoxide.
D)  carbon oxide.
E)  carbon dioxide.

Question 16

When placed in water,an inorganic compound dissociates 99 percent,forming hydrogen ions and anions.This compound would be a

Accepted Answer

A)  strong base.
B)  weak base.
C)  strong acid.
D)  weak acid.
E)  salt.

Question 17

Which of the following are organic substances?

Accepted Answer

A)  lipids
B)  nucleic acids
C)  proteins
D)  lipids and proteins
E)  lipids,nucleic acids,and proteins

Question 18

AMP + P →

Accepted Answer

A)  ADP.
B)  2ADP.
C)  DNA.
D)  ATP.
E)  adenine.

Question 19

Alaska Natives have a lower incidence of heart disease even though their diets are high in fat and cholesterol.This may be due to the large amount of ________ in their diets.

Accepted Answer

A)  vitamins
B)  triglycerides
C)  prostaglandins
D)  omega-3 fatty acids
E)  oleic acid

Question 20

Each amino acid differs from another in the

Accepted Answer

A)  number of central carbon atoms.
B)  size of the amino group.
C)  number of carboxyl groups.
D)  nature of the side chain.
E)  number of peptide bonds in the molecule.

Exam 2: The Chemical Level of Organization

Alaska Natives have a lower incidence of heart disease even though their diets are high in fat and cholesterol.This may be due to the large amount of ________ in their diets.

Correct AnswerverifiedShow Answer

The hydrolysis of ATP yields ADP,phosphate ion,and

Correct AnswerverifiedShow Answer

When placed in water,an inorganic compound dissociates 99 percent,forming hydrogen ions and anions.This compound would be a

Correct AnswerverifiedShow Answer

The molecule DNA contains a five-carbon sugar called

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The molecule CO₂ is known as

Correct AnswerverifiedShow Answer

An amino acid is to a protein as a ________ is to a nucleic acid.

Correct AnswerverifiedShow Answer

During ionization,water molecules disrupt the ionic bonds of a salt to produce a mixture of ions.These ions can carry a current and so are called

Correct AnswerverifiedShow Answer

AMP + P →

Correct AnswerverifiedShow Answer

Molecules that do not readily interact with water are called

Correct AnswerverifiedShow Answer

Fructose is

Correct AnswerverifiedShow Answer

If an isotope of oxygen has 8 protons,10 neutrons,and 8 electrons,its mass number is

Correct AnswerverifiedShow Answer

A dust particle floating on a water surface illustrates

Correct AnswerverifiedShow Answer

Molecules that store and process genetic information are the

Correct AnswerverifiedShow Answer

Many lipids are composed of fatty acids and

Correct AnswerverifiedShow Answer

A solution containing equal numbers of hydrogen ions and hydroxide ions is

Correct AnswerverifiedShow Answer

Which of the following are organic substances?

Correct AnswerverifiedShow Answer

The pyrimidine bases found in DNA are ________ and cytosine.

Correct AnswerverifiedShow Answer

Each amino acid differs from another in the

Correct AnswerverifiedShow Answer

Artificial sweeteners

Correct AnswerverifiedShow Answer

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