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2013 National Chemistry Olympiad
59
2013 USNCO Problem 59: Peptide Functional Group
2013 USNCO Problem 59: Peptide Functional Group
Source:
April 18, 2013
Problem Statement
All of the following atoms comprise part of a peptide functional group except:
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
A
)
<
/
s
p
a
n
>
Hydrogen
<
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p
a
n
c
l
a
s
s
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l
a
t
e
x
−
b
o
l
d
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>
(
B
)
<
/
s
p
a
n
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Nitrogen
<span class='latex-bold'>(A)</span>\ \text{Hydrogen} \qquad<span class='latex-bold'>(B)</span>\ \text{Nitrogen}\qquad
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
A
)
<
/
s
p
an
>
Hydrogen
<
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p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
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>
(
B
)
<
/
s
p
an
>
Nitrogen
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
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>
(
C
)
<
/
s
p
a
n
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Oxygen
<
s
p
a
n
c
l
a
s
s
=
′
l
a
t
e
x
−
b
o
l
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>
(
D
)
<
/
s
p
a
n
>
Phosphorous
{<span class='latex-bold'>(C)</span>\ \text{Oxygen} \qquad<span class='latex-bold'>(D)</span>}\ \text{Phosphorous} \qquad
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
C
)
<
/
s
p
an
>
Oxygen
<
s
p
an
c
l
a
ss
=
′
l
a
t
e
x
−
b
o
l
d
′
>
(
D
)
<
/
s
p
an
>
Phosphorous
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