Intro to Carbohydrates
keto/aldo ___oses,
chirality,
and
Stereoisomerism
What’s your favorite flower
(on this list)?
ac
n
na
t io
Ca
r
20%
L il
20%
y
20%
L il
20%
sy
se
20%
Da
i
Rose
Daisy
Lily
Carnation
Lilac
Ro
A.
B.
C.
D.
E.
17%
17%
17%
6
17%
4
17%
3
17%
2
1
2
3
4
5
6
1
A.
B.
C.
D.
E.
F.
5
How many chiral carbons in a
ketotetrose?
17%
17%
17%
6
17%
4
17%
3
17%
2
1
2
3
4
5
6
1
A.
B.
C.
D.
E.
F.
5
How many chiral carbons in an
aldopentose?
How many stereoisomers of an
aldopentose?
Rank
1
2
3
4
5
6
Responses
17%
17%
17%
17%
3
4
17%
17%
23 = 4
Other
1
2
5
6
How many stereoisomers of an
ketotetrose?
Rank
1
2
3
4
5
6
Responses
17%
17%
17%
17%
3
4
17%
17%
21 = 2
Other
1
2
5
6
Which best decribes a ketotetrose and
a aldotetrose?
t.
..
le
ol
ec
u
tm
en
st
ha
ec
ul
ol
m
am
e
es
Th
so
m
er
st
ha
t
Di
ffe
r
St
er
eo
i
m
er
st
ha
t
ar
ar
e
e
e.
..
m
iso
na
l
eo
iso
st
itu
tio
St
er
di
..
.
er
s
e
20% 20% 20% 20% 20%
Co
n
A. Constitutional
isomers
B. Stereoisomers that
are enantiomers
C. Stereoisomers that
are diastereomers
D. The same molecule
E. Different molecules
that are not isomers.
Which best decribes two
different D-aldopentoses?
t.
..
le
ol
ec
u
tm
en
st
ha
ec
ul
ol
m
am
e
es
Th
so
m
er
st
ha
t
Di
ffe
r
St
er
eo
i
m
er
st
ha
t
ar
ar
e
e
e.
..
m
iso
na
l
eo
iso
st
itu
tio
St
er
di
..
.
er
s
e
20% 20% 20% 20% 20%
Co
n
A. Constitutional
isomers
B. Stereoisomers that
are enantiomers
C. Stereoisomers that
are diastereomers
D. The same molecule
E. Different molecules
that are not isomers.
Which best describes Glucose and
fructose?
t.
..
le
ol
ec
u
tm
en
st
ha
ec
ul
ol
m
am
e
es
Th
so
m
er
st
ha
t
Di
ffe
r
St
er
eo
i
m
er
st
ha
t
ar
ar
e
e
e.
..
m
iso
na
l
eo
iso
st
itu
tio
St
er
di
..
.
er
s
e
20% 20% 20% 20% 20%
Co
n
A. Constitutional
isomers
B. Stereoisomers that
are enantiomers
C. Stereoisomers that
are diastereomers
D. The same molecule
E. Different molecules
that are not isomers.