Chemistry: Matter and Change

Chapter 23: The Chemistry of Life

Chapter Test Practice

1
What sort of bonding is most responsible for the helical or folded shape of proteins?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_5.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (47.0K)</a>
A)peptide
B)covalent
C)ionic
D)hydrogen
2
What is the function of the iron group (called a heme) in the hemoglobin molecule?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_7.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (32.0K)</a>
A)It holds the molecule together.
B)It provides a spot for oxygen binding.
C)It provides a spot for hydrogen bonds to form.
D)It makes the molecule heavier.
3
Which statement is not true of starch and cellulose?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_12.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (50.0K)</a>
A)Both are composed of glucose subunits.
B)Both are polysaccharides.
C)Both are insoluble in water.
D)Both are digestible by humans.
4
Glucose and galactose are ________.

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_9.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (39.0K)</a>
A)stereoisomers
B)structural isomers
C)polymers
D)chiral
5
Which of the following statements is true of oleic and stearic acids?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_13.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (37.0K)</a>
A)Both acids contain 20 carbon atoms, and both are saturated.
B)Both acids contain 18 carbon atoms, and both are saturated.
C)Both contain 20 carbon atoms, but only oleic acid is saturated.
D)Both contain 18 carbon atoms, but only stearic acid is saturated.
6
What property of soaps makes them useful as cleaning agents?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_16.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (23.0K)</a>
A)They have both a polar and a non-polar end.
B)They are slippery.
C)They are non-soluble in water.
D)They are aromatic.
7
Nitrogen bases in DNA always pair in a specific way. What is the term used to describe this pairing?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_22.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (26.0K)</a>
A)hydrogen base pairs
B)nitrogen base pairs
C)complementary base pairs
D)side-by-side base pairs
8
The ________ that makes up a nucleic acid is called a nucleotide.

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_20.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (51.0K)</a>
A)monomer
B)polymer
C)polypeptide
D)lipid
9
In cellular respiration, carbon atoms in glucose are ________ and oxygen atoms in oxygen gas are ________.

C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy
A)reduced; reduced
B)oxidized; oxidized
C)oxidized; reduced
D)reduced; oxidized
10
Compared to cellular respiration, fermentation is less efficient because there is no ________ to react with glucose.

C6H12O6 yields 2CH3CH2OH + 2CO2 + energy
A)oxygen
B)hydrogen
C)ethanol
D)carbon dioxide
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe