Question 1

Ionic bonds

Accepted Answer

A)  result from sharing electrons.
B)  result from transferring electrons.
C)  result from like charge attraction.
D)  are the weakest chemical bonds.
E)  always involve carbon.F) C) and D)
G) B) and C)

Question 2

The only part of an amino acid that differs from other amino acids is its R group.

Accepted Answer

A) True 
 B)False

Question 3

Atoms that gain or lose electrons become charged particles called

Accepted Answer

A)  cations.
B)  anions.
C)  ions.
D)  isotopes.E) A) and D)
F) A) and C)

Question 4

A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Accepted Answer

A)  unsaturated
B)  polyunsaturated
C)  monounsaturated
D)  saturatedE) B) and D)
F) B) and C)

Question 5

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Accepted Answer

A)  carbon
B)  nitrogen
C)  oxygen
D)  hydrogen
E)  phosphorousF) C) and D)
G) A) and E)

Question 6

Polar molecules are composed of covalently bonded

Accepted Answer

A)  identical atoms.
B)  carbon atoms.
C)  ions.
D)  atoms of different electronegativity.
E)  atoms of identical electronegativity.F) B) and C)
G) C) and D) D

Question 7

Which of the following represents a reversible reaction?

Accepted Answer

A)  AB  →\rarr→  A + B
B)  A + B  →\rarr→  AB
C)  AB + XY  →\rarr→  AY + XB.
D)  AB + XY  →\rarr→  AY + XB E) B) and D)
F) B) and C)

Question 8

Nucleic acids have primary,secondary,tertiary,and quaternary levels of organization.

Accepted Answer

A) True 
 B)False  False

Question 9

Two or more atoms bonded together are called a/an

Accepted Answer

A)  ion.
B)  isotope.
C)  element.
D)  electrolyte.
E)  molecule.F) A) and B)
G) A) and D)

Question 10

Characteristics shared by all cells include

Accepted Answer

A)  a membrane serving as a cell boundary.
B)  the possession of genetic information.
C)  the presence of cellular fluid.
D)  All of the choices are correct.E) None of the above
F) All of the above

Question 11

An example of an amphipathic molecule found in living cells is

Accepted Answer

A)  glucose.
B)  phospholipid.
C)  protein.
D)  nucleic acids.
E)  ATP.F) A) and E)
G) A) and B)

Question 12

During protein synthesis,____ RNA is made to be a copy of a gene from the DNA that will be translated into protein.

Accepted Answer

A)  transfer
B)  messenger
C)  ribosomal
D)  small subunitE) A) and D)
F) A) and B)

Question 13

Select the statement that most accurately reflects the process of plant material digestion in humans:

Accepted Answer

A)  it is a very efficient process the produces very little undigested material in feces.
B)  it is a process that is dependent upon enzyme (cellulase) production by gut microbiota.
C)  it requires the action of enzymes called kinases.
D)  it is linked to the digestion of glycogen.E) None of the above
F) A) and B)

Question 14

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Accepted Answer

A) True 
 B)False

Question 15

If solution A has a lower pH compared to solution B,then solution A is more acidic than solution B.

Accepted Answer

A) True 
 B)False

Question 16

The alpha ( α\alphaα ) helix is a type of _____ protein structure.

Accepted Answer

A)  primary
B)  secondary
C)  tertiary
D)  quaternary E) A) and D)
F) C) and D)

Question 17

Anything that occupies space and has mass is called

Accepted Answer

A)  atomic.
B)  living.
C)  matter.
D)  energy.
E)  space.F) A) and B)
G) A) and C)

Question 18

Covalent bonds

Accepted Answer

A)  result from losing electrons.
B)  are always polar.
C)  are always nonpolar.
D)  result from sharing electrons.
E)  result from gaining electrons.F) D) and E)
G) A) and E)

Question 19

An atom has gained an electron.It has been

Accepted Answer

A)  oxidized.
B)  reduced.
C)  ionized.
D)  deionized.
E)  neutralized.F) A) and B)
G) A) and E)

Question 20

Cations are

Accepted Answer

A)  charged subatomic particles.
B)  atoms that have gained electrons.
C)  atoms that have gained neutrons.
D)  capable of forming ionic bonds with anions.
E)  atoms without protons.F) D) and E)
G) B) and E) D

Exam 2: The Chemistry of Biology

Ionic bonds

Correct AnswerverifiedShow Answer

The only part of an amino acid that differs from other amino acids is its R group.

Correct AnswerverifiedShow Answer

Atoms that gain or lose electrons become charged particles called

Correct AnswerverifiedShow Answer

A fat is called _____ if all carbons of the fatty acid chain are single-bonded to 2 other carbons and 2 hydrogens.

Correct AnswerverifiedShow Answer

Organic chemicals always have a basic framework of the element _____ bonded to other atoms.

Correct AnswerverifiedShow Answer

Polar molecules are composed of covalently bonded

Correct AnswerverifiedD

Which of the following represents a reversible reaction?

Correct AnswerverifiedShow Answer

Nucleic acids have primary,secondary,tertiary,and quaternary levels of organization.

Correct AnswerverifiedFalse

Two or more atoms bonded together are called a/an

Correct AnswerverifiedShow Answer

Characteristics shared by all cells include

Correct AnswerverifiedShow Answer

An example of an amphipathic molecule found in living cells is

Correct AnswerverifiedShow Answer

During protein synthesis,____ RNA is made to be a copy of a gene from the DNA that will be translated into protein.

Correct AnswerverifiedShow Answer

Select the statement that most accurately reflects the process of plant material digestion in humans:

Correct AnswerverifiedShow Answer

Electrons that participate in chemical bonding are typically located closest to the nucleus.

Correct AnswerverifiedShow Answer

If solution A has a lower pH compared to solution B,then solution A is more acidic than solution B.

Correct AnswerverifiedShow Answer

The alpha ( α\alphaα ) helix is a type of _____ protein structure.

Correct AnswerverifiedShow Answer

Anything that occupies space and has mass is called

Correct AnswerverifiedShow Answer

Covalent bonds

Correct AnswerverifiedShow Answer

An atom has gained an electron.It has been

Correct AnswerverifiedShow Answer

Cations are

Correct AnswerverifiedD

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D

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False

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The alpha ( $\alpha$ ) helix is a type of _____ protein structure.

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D