Chemistry: Matter and Change

Section 1: Proteins

Self Check Quizzes

1
A chain of 15 amino acids joined by peptide bonds is called a(n) __________.

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/007874637x/514831/fig23_2.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"> (22.0K)</a>
A)enzyme
B)peptide
C)polypeptide
D)protein
2
A polypeptide of 50 or more amino acids is called a protein. What kind of molecule is the polypeptide?
A)isomer
B)monomer
C)stereomer
D)polymer
3
Enzymes act as __________ in your body.
A)catalysts
B)carbohydrates
C)lipids
D)substrates
4
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
5
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/514719/figure_23_7.jpg','popWin', 'width=254,height=266,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (52.0K)</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.
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe