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Biochem 1 > Carbohydrate Stereoisomers + Structures > Flashcards

Carbohydrate Stereoisomers + Structures Flashcards

1
Q

Define chiral carbon

A

C w/ 4 different groups attached

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2
Q

What is the formula for # of chiral Cs in an ALDOSE

A

Aldose chiral Cs = Cs - 2

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3
Q

What is the formula for # of chiral Cs in a KETOSE

A

Ketose chiral Cs = Cs - 3

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4
Q

What is the formula for total # of stereoisomers in a carb

A

Total # stereoisomers = 2^n
n = # chiral carbons

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5
Q

What is the formula to determine # naturally occurring stereoisomers

A

naturally occurring stereoisomers = total stereoisomers / 2

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6
Q

Draw/recognize ALDOSE (D-glyceraldehyde)

A
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7
Q

Draw/recognize KETOSE (dihydroxyacetone)

A
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8
Q

Name/recognize L-ERYTHROSE vs D-ERYTHROSE

A
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9
Q

Name/recognize D-RIBOSE vs L-RIBOSE

A
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10
Q

Name/recognize D-RIBULOSE

A
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11
Q

Name/recognize GLUCOSE

A
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12
Q

Name/recognize MANNOSE

A
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13
Q

Name/recognize GALACTOSE

A
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14
Q

Name/recognize FRUCTOSE

A
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15
Q

Name the ALDOSE TRIOSE

A

Glyceraldehyde

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16
Q

How many chiral Cs are in a TRIOSE ALDOSE; how many total stereoisomers; how many naturally occurring stereoisomers?

A

1 chiral carbon, 2 stereoisomers, 1 naturally occurring stereoisomers

17
Q

Draw an ALDOSE TRIOSE

A

D-glyceraldehyde

18
Q

Name the KETOSE TRIOSE

A

Dihydroxyacetone

19
Q

How many chiral Cs in a TRIOSE KETOSE, total stereoisomers, naturally occurring stereoisomers?

A

0 chiral carbons, 1 stereoisomer, 1 naturally occurring stereoisomers

20
Q

Draw the structure of the TRIOSE KETOSE

A

Dihydroxyacetone

21
Q

Name an ALDOSE TETROSE

A

Erythrose

22
Q

How many chiral Cs in a TETROSE ALDOSE, total stereoisomers, naturally occurring stereoisomers?

A

2 chiral carbons, 4 stereoisomers, 2 naturally occurring stereoisomers

23
Q

Draw the structure of an ALDOSE TETROSE

A

D-Erythrose

24
Q

Name an ALDOSE PENTOSE

A

Ribose

25
Q

How many chiral Cs for an ALDOSE PENTOSE, total stereoisomers, naturally occurring stereoisomers?

A

3 chiral carbons, 8 stereoisomers, 4 naturally occurring stereoisomers

26
Q

Draw the structure of PENTOSE ALDOSE

A

D- Ribose

27
Q

Name a KETOSE PENTOSE

A

D-ribulose

28
Q

Name 3 ALDOSE HEXOSES

A

D-glucose, D-mannose, D-galactose

29
Q

How many chiral Cs in a HEXOSE ALDOSE, total stereoisomers, naturally occurring stereoisomers?

A

4 chiral carbons, 16 stereoisomers, 8 naturally occurring stereoisomers

30
Q

Draw the structure of a HEXOSE ALDOSE

A

D-allose

31
Q

Name a KETOSE HEXOSE

A

Fructose

Biochem 1 (23 decks)

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