Question 1

Proteins

Accepted Answer

A)   insulate and cushion the body.
B)   are the body's source of immediate energy.
C)   are the building blocks of nucleotides.
D)   contain the genetic information of the cell.
E)   provide much of the structure of body cells and tissues.F) A) and B)
G) All of the above E

Question 2

Which of the following statements best describes RNA?

Accepted Answer

A)   RNA is a double helix.
B)   RNA is a single-stranded molecule.
C)   RNA molecules are antiparallel.
D)   RNA contains the base thymine.
E)   RNA is found outside a cell.F) C) and D)
G) A) and E) B

Question 3

Intermolecular forces

Accepted Answer

A)   separate atoms and ions from one another.
B)   are electrostatic attractions between different molecules.
C)   are found within molecules.
D)   evenly distribute electrical charge among all atoms in a sample.
E)   form dissociated ions.F) C) and E)
G) A) and B) B

Question 4

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 C)
F) B) and D)

Question 5

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 E)
G) B) and C)

Question 6

ATP

Accepted Answer

A)   can be synthesized from ADP.
B)   stores and releases energy in the cell.
C)   is associated with a reversible reaction.
D)   is associated with anabolism and catabolism.
E)   All of these choices are correct.F) A) and B)
G) A) and C)

Question 7

Nucleotides

Accepted Answer

A)   hold the nucleus together.
B)   are proteins that function as enzymes.
C)   have nothing to do with the genetic information in the nucleus.
D)   are the building blocks of nucleic acids.
E)   are part of DNA molecules but not RNA molecules.F) B) and E)
G) C) and D)

Question 8

Inorganic chemists study substances _______ carbon, while organic chemists study substances _______ carbon.

Accepted Answer

A)   lacking; containing
B)   containing more than 1 mole of; with less than a mole of
C)   containing; lackingD) A) and C)
E) A) and B)

Question 9

The smallest particle of an element that still exhibits the chemical characteristics of that element is a(n)

Accepted Answer

A)   proton.
B)   atom.
C)   orbital.
D)   chemical bond.
E)   electron.F) B) and E)
G) All of the above

Question 10

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) A) and D)
G) B) and D)

Question 11

In order to get energy (ATP)  from food molecules in the final stage of respiration, humans require _____.

Accepted Answer

A)   carbon dioxide
B)   oxygen
C)   sodiumD) None of the above
E) A) and B)

Question 12

Which of the following is NOT a function of carbohydrates in the body?

Accepted Answer

A)   structural component of RNA
B)   bulk in feces
C)   structural component of DNA
D)   protection
E)   energyF) A) and B)
G) A) and C)

Question 13

Triglycerides are composed of

Accepted Answer

A)   monosaccharides.
B)   amino acids.
C)   nucleotides.
D)   glycerol and fatty acids.
E)   None of these choices are correct.F) None of the above
G) B) and C)

Question 14

Deoxyribose is a sugar found in

Accepted Answer

A)   RNA.
B)   DNA.
C)   glycogen.
D)   starch.
E)   ATP.F) B) and C)
G) A) and B)

Question 15

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded. This reaction releases water. What type of reaction is this?

Accepted Answer

A)   monomeric
B)   hydrolysis
C)   catabolic
D)   dehydrationE) None of the above
F) All of the above

Question 16

A substance composed of two or more different types of atoms is a(n)

Accepted Answer

A)   element.
B)   compound and a molecule.
C)   compound.
D)   molecule.
E)   ion.F) B) and D)
G) D) and E)

Question 17

Phospholipids have a hydrophilic end which is

Accepted Answer

A)   polar and water-soluble.
B)   nonpolar and water-soluble.
C)   polar and water-insoluble.
D)   nonpolar and water -insoluble.E) All of the above
F) B) and C)

Question 18

If the potential energy in the chemical bonds of the reactants is greater than the potential energy in the chemical bonds of the product,

Accepted Answer

A)   energy must be supplied for the reaction to occur.
B)   the chemical reaction equalizes the potential energy levels.
C)   energy is not a factor in the reaction.
D)   energy has not been gained or lost.
E)   energy is released by the reaction.F) B) and C)
G) A) and B)

Question 19

An anion is

Accepted Answer

A)   a molecule that conducts electricity when placed in solution.
B)   a negatively charged ion.
C)   a combination of atoms held together by chemical bonds.
D)   an alteration in the three-dimensional structure of a protein.
E)   a positively charged ion.F) B) and D)
G) D) and E)

Question 20

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 B)
G) D) and E)

Exam 2: The Chemical Basis of Life

Proteins

Correct AnswerverifiedE

Which of the following statements best describes RNA?

Correct AnswerverifiedB

Intermolecular forces

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Substances dissolved in the liquid portion of a solution are called

Correct AnswerverifiedShow Answer

ATP

Correct AnswerverifiedShow Answer

Nucleotides

Correct AnswerverifiedShow Answer

Inorganic chemists study substances _______ carbon, while organic chemists study substances _______ carbon.

Correct AnswerverifiedShow Answer

The smallest particle of an element that still exhibits the chemical characteristics of that element is a(n)

Correct AnswerverifiedShow Answer

Ribose is the

Correct AnswerverifiedShow Answer

In order to get energy (ATP) from food molecules in the final stage of respiration, humans require _____.

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of carbohydrates in the body?

Correct AnswerverifiedShow Answer

Triglycerides are composed of

Correct AnswerverifiedShow Answer

Deoxyribose is a sugar found in

Correct AnswerverifiedShow Answer

Sucrose is formed when the simple sugars fructose and glucose are covalently bonded. This reaction releases water. What type of reaction is this?

Correct AnswerverifiedShow Answer

A substance composed of two or more different types of atoms is a(n)

Correct AnswerverifiedShow Answer

Phospholipids have a hydrophilic end which is

Correct AnswerverifiedShow Answer

If the potential energy in the chemical bonds of the reactants is greater than the potential energy in the chemical bonds of the product,

Correct AnswerverifiedShow Answer

An anion is

Correct AnswerverifiedShow Answer

Why are cyanide compounds lethal to humans?

Correct AnswerverifiedShow Answer

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Inorganic chemists study substances _ carbon, while organic chemists study substances _ carbon.

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