Question 1

A decrease of hydrogen ions in the body fluids can have disastrous results because

Accepted Answer

A)   decreased hydrogen ions can break chemical bonds.
B)   decreased hydrogen ions can change the shape of large complex molecules, rendering them nonfunctional.
C)   decreased hydrogen ions can disrupt tissue functions.
D)   decreased hydrogen ions can kill living cells.
E)   all of the aboveF) C) and E)
G) B) and E) E

Question 2

Covalent bonds are formed when

Accepted Answer

A)   atoms share electrons.
B)   cations and anions are held together by their opposite charges.
C)   a pair of electrons is shared unequally by two atoms.
D)   hydrogen forms bonds with negatively charged atoms in the same or different molecules.
E)   two or more atoms lose electrons at the same time.F) A) and C)
G) A) and E)

Question 3

Which statement about the reaction H2 + Cl2 → 2HCl is correct?

Accepted Answer

A)   H2 and Cl2 are the products.
B)   HCl is the product.
C)   One molecule of hydrogen contains one atom.
D)   One molecule of chlorine contains one atom.
E)   All of the above are correct.F) All of the above
G) A) and B)

Question 4

Which of the following is a characteristic of hydrogen bonds?

Accepted Answer

A)   Hydrogen bonds are strong attractive forces between hydrogen atoms and negatively charged atoms.
B)   Hydrogen bonds occur ONLY in water.
C)   Hydrogen bonds can form between neighboring molecules.
D)   Hydrogen bonds are part of fatty-acid structure.
E)   Hydrogen bonds are part of carbohydrate structure.F) C) and D)
G) A) and D)

Question 5

Which of the following is unique to RNA?

Accepted Answer

A)   glucose
B)   phosphate group
C)   ribose
D)   adenosine triphosphate
E)   deoxyriboseF) All of the above
G) A) and B)

Question 6

Using the figure above, identify the labeled part.
-Label L: ________

Accepted Answer

The answer of  Using the figure above, identify the...

Question 7

_________________________ are soluble inorganic compounds whose ions will conduct an electric current in solutions.

Accepted Answer

The answer of _________________________ are soluble inorganic compounds whose ions...

Question 8

Which of the following is a weak electrical attraction between molecules?

Accepted Answer

A)   ionic bond
B)   covalent bond
C)   polar bond
D)   metallic bond
E)   hydrogen bondF) None of the above
G) A) and B)

Question 9

A solution containing more hydrogen ions than hydroxide ions is

Accepted Answer

A)   acidic.
B)   basic.
C)   neutral.
D)   alkaline.
E)   none of the aboveF) B) and E)
G) None of the above

Question 10

The most important metabolic fuel molecule in the body is

Accepted Answer

A)   sucrose.
B)   starch.
C)   protein.
D)   vitamin B12.
E)   glucose.F) C) and E)
G) All of the above

Question 11

The best definition of organic material is anything that

Accepted Answer

A)   contains carbon.
B)   contains carbon, oxygen, and hydrogen covalently bonded.
C)   contains carbon, nitrogen, and hydrogen covalently bonded.
D)   contains hydrogen covalently bonded.
E)   contains carbon and hydrogen covalently bonded.F) B) and E)
G) D) and E)

Question 12

Chemical reactions that occur in the human body are controlled by special protein molecules called _________________________.

Accepted Answer

enzymes

Question 13

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

Accepted Answer

A)   exchange.
B)   reversible.
C)   combustion.
D)   replacement.
E)   metabolism.F) A) and E)
G) B) and E)

Question 14

All of the elements and compounds that are eaten and used by the body for some function are called

Accepted Answer

A)   inorganic compounds.
B)   organic compounds.
C)   nutrients.
D)   metabolites.
E)   enzymes.F) C) and D)
G) B) and E)

Question 15

A class of lipids used to signal cells to undergo changes is called

Accepted Answer

A)   steroids.
B)   phospholipids.
C)   triglycerides.
D)   hormones.
E)   monoglycerides.F) B) and D)
G) C) and D)

Question 16

Which of the following would have a negative charge?

Accepted Answer

A)   an atom
B)   a molecule
C)   a proton
D)   a neutron
E)   an electronF) A) and C)
G) A) and E)

Question 17

Using the figure above, identify the labeled part.
-Label J: ________

Accepted Answer

The answer of  Using the figure above, identify the...

Question 18

Using the figure above, identify the labeled part.
-Label H: ________

Accepted Answer

The answer of  Using the figure above, identify the...

Question 19

How many electrons do MOST atoms need in their outer shell to be stable?

Accepted Answer

A)   two
B)   three
C)   four
D)   six
E)   eightF) A) and C)
G) A) and E)

Question 20

If an element is composed of atoms with an atomic number of 8 and a mass number of 14, then a neutral atom of this element contains

Accepted Answer

A)   6 protons.
B)   6 neutrons.
C)   6 electrons.
D)   14 protons.
E)   14 electrons.F) C) and D)
G) A) and C) B

Exam 2: The Chemical Level of Organization

A decrease of hydrogen ions in the body fluids can have disastrous results because

Correct AnswerverifiedE

Covalent bonds are formed when

Correct AnswerverifiedShow Answer

Which statement about the reaction H2 + Cl2 → 2HCl is correct?

Correct AnswerverifiedShow Answer

Which of the following is a characteristic of hydrogen bonds?

Correct AnswerverifiedShow Answer

Which of the following is unique to RNA?

Correct AnswerverifiedShow Answer

Using the figure above, identify the labeled part. -Label L: ________

Correct AnswerverifiedShow Answer

_________________________ are soluble inorganic compounds whose ions will conduct an electric current in solutions.

Correct AnswerverifiedShow Answer

Which of the following is a weak electrical attraction between molecules?

Correct AnswerverifiedShow Answer

A solution containing more hydrogen ions than hydroxide ions is

Correct AnswerverifiedShow Answer

The most important metabolic fuel molecule in the body is

Correct AnswerverifiedShow Answer

The best definition of organic material is anything that

Correct AnswerverifiedShow Answer

Chemical reactions that occur in the human body are controlled by special protein molecules called _________________________.

Correct Answerverifiedenzymes

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

Correct AnswerverifiedShow Answer

All of the elements and compounds that are eaten and used by the body for some function are called

Correct AnswerverifiedShow Answer

A class of lipids used to signal cells to undergo changes is called

Correct AnswerverifiedShow Answer

Which of the following would have a negative charge?

Correct AnswerverifiedShow Answer

Using the figure above, identify the labeled part. -Label J: ________

Correct AnswerverifiedShow Answer

Using the figure above, identify the labeled part. -Label H: ________

Correct AnswerverifiedShow Answer

How many electrons do MOST atoms need in their outer shell to be stable?

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If an element is composed of atoms with an atomic number of 8 and a mass number of 14, then a neutral atom of this element contains

Correct AnswerverifiedB

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Which statement about the reaction H₂ + Cl₂ → 2HCl is correct?

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enzymes

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