Question 1

If the products of a chemical reaction contain less potential energy than the reactants,

Accepted Answer

A)  energy has been stored in the molecular bonds of the product.
B)  energy has been released by the breaking of molecular bonds.
C)  the reaction will be reversible without additional energy input.
D)  a synthesis reaction is likely to have occurred.
E)  All of these choices are correct.F) A) and C)
G) None of the above

Question 2

Substances dissolved in the liquid portion of a solution are called

Accepted Answer

A)  solvents.
B)  insoluble.
C)  catalysts.
D)  osmoles.
E)  solutes.F) A) and D)
G) C) and D)

Question 3

The pH value

Accepted Answer

A)  is determined by the concentration of hydrogen ions.
B)  decreases with alkalinity.
C)  is measured on a scale from 0 to 10.
D)  reflects the sodium content of body fluids.
E)  increases with acidity.F) A) and B)
G) C) and D)

Question 4

Which of the following organic groups does DNA belong to?

Accepted Answer

A)  protein
B)  lipid
C)  nucleic acid
D)  carbohydrate
E)  vitaminF) D) and E)
G) A) and B)

Question 5

The conversion between different states of energy (e.g.potential energy to kinetic energy) :

Accepted Answer

A)  is not 100% efficent
B)  is 100% efficent
C)  typically generates heat
D)  is not possible,energy can not change its state.
E)   is not 100% efficient and typically generates heatF) A) and B)
G) B) and E)

Question 6

Heat energy is

Accepted Answer

A)  energy that flows between objects with different temperatures.
B)  movement of ions or electrons.
C)  stored energy that could do work but is not doing so.
D)  energy that moves in waves.
E)  the form of energy that actually does work.F) None of the above
G) B) and D)

Question 7

If the ratio of products and reactants are stable,the system is in _______.

Accepted Answer

A)   activation
B)   steady state
C)   equilibriumD) A) and C)
E) B) and C)

Question 8

The building blocks of proteins are

Accepted Answer

A)  eicosanoids.
B)  amino acids.
C)  triglycerides.
D)  phospholipids.
E)  monosaccharides.F) A) and E)
G) A) and D)

Question 9

Why are cyanide compounds lethal to humans?

Accepted Answer

A)  They interfere with protein synthesis.
B)  They interfere with nerve impulses.
C)  They interfere with the production of ATP.
D)  They interfere with muscle contraction.
E)  All of these occur with cyanide poisoning.F) A) and D)
G) None of the above

Question 10

Starch is the

Accepted Answer

A)  storage carbohydrate in animals.
B)  sugar found in RNA.
C)  major nutrient for most body cells.
D)  nondigestible plant polysaccharide.
E)  storage carbohydrate in plants.F) D) and E)
G) A) and B)

Question 11

Consider the following five terms.Which term does not belong with the other four terms?

Accepted Answer

A)  glucose
B)  lactose
C)  disaccharide
D)  sucrose
E)  maltoseF) A) and E)
G) B) and D)

Question 12

A neutral atom will become a cation if it

Accepted Answer

A)  gains neutrons.
B)  gains electrons.
C)  loses protons.
D)  gains protons.
E)  loses electrons.F) All of the above
G) A) and B)

Question 13

Which of the following lists includes only monosaccharides that are isomers of one another?

Accepted Answer

A)  starch,glycogen,cellulose
B)  glucose,fructose,galactose
C)  ribose,glycogen,glucose
D)  glycogen,glucose,sucrose
E)  deoxyribose,glycogen,starchF) A) and B)
G) A) and C)

Question 14

Which of the following is not a use of X-ray imaging?

Accepted Answer

A)   breast cancer screening in mammography
B)   upper digestive tract abnormalities following barium ingestion
C)   brain tumor progression
D)   vertebrae fracturesE) A) and B)
F) None of the above

Question 15

Ribose is the

Accepted Answer

A)  storage carbohydrate in animals.
B)  storage carbohydrate in plants.
C)  major nutrient for most body cells.
D)  nondigestible plant polysaccharide.
E)  sugar found in RNA and ATP.F) B) and C)
G) A) and E)

Question 16

Kinetic energy is

Accepted Answer

A)  movement of ions or electrons.
B)  energy that moves in waves.
C)  energy that flows between objects with different temperatures.
D)  the form of energy that actually does work.
E)  stored energy that could do work but is not doing so.F) B) and D)
G) A) and D)

Question 17

Which of the following is a carbohydrate?

Accepted Answer

A)  animal fat
B)  triglyceride
C)  sucrose
D)  cholesterol
E)  hemoglobinF) A) and B)
G) All of the above

Question 18

An enzyme

Accepted Answer

A)  has a two-dimensional shape.
B)  is a protein catalyst.
C)  increases the activation energy needed in a chemical reaction.
D)  cannot be denatured.
E)  is permanently changed in a chemical reaction.F) D) and E)
G) A) and B)

Question 19

Which function of proteins is NOT correctly matched with the example?

Accepted Answer

A)  structure - collagen and keratin
B)  regulation - enzymes and hormones
C)  transport - hemoglobin
D)  contraction - actin and myosin in muscles
E)  protection - packing around organs and glandsF) None of the above
G) B) and D)

Question 20

Which of the following lists the components of a nucleotide?

Accepted Answer

A)  phosphate-sucrose-amino acid
B)  phosphate-lipid-organic base
C)  monosaccharide-organic base-sucrose
D)  monosaccharide-amino acid-phosphate
E)  phosphate-monosaccharide-organic baseF) A) and B)
G) All of the above

Exam 2: The Chemical Basis of Life

Why are cyanide compounds lethal to humans?

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Heat energy is

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Consider the following five terms.Which term does not belong with the other four terms?

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The conversion between different states of energy (e.g.potential energy to kinetic energy) :

Correct AnswerverifiedShow Answer

If the ratio of products and reactants are stable,the system is in _______.

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Which of the following lists the components of a nucleotide?

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Ribose is the

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An enzyme

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Which of the following is a carbohydrate?

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Which of the following is not a use of X-ray imaging?

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Substances dissolved in the liquid portion of a solution are called

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The pH value

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If the products of a chemical reaction contain less potential energy than the reactants,

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Which of the following lists includes only monosaccharides that are isomers of one another?

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Which function of proteins is NOT correctly matched with the example?

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A neutral atom will become a cation if it

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Kinetic energy is

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Which of the following organic groups does DNA belong to?

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The building blocks of proteins are

Correct AnswerverifiedShow Answer

Starch is the

Correct AnswerverifiedShow Answer

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