VL 2-5 Kohlenhydrate

Question 1

Sugars: if the OH on the bottom chiral centre points to the right, it is referred to as ___ (Fischer Projektion)

Haworth?

Answer 1

D-

Haworth: points up

Question 2

Sugars: if the OH on the bottom chiral centre points to the left, it is referred to as ___ (Fischer Projektion)

Haworth?

Answer 2

L-

Haworth: points down

Question 3

alpha sugar

Answer 3

opposite side to C6

D Sugar: OH at anomeric Carbon is down (in Haworth)

Question 4

beta sugar

Answer 4

same side as C6

D Sugar: OH at anomeric Carbon is up (in Haworth)

Question 5

Mannose

Answer 5

CHO
HO-
HO-
H-
H-

Question 6

Galactose

Answer 6

H-
HO-
HO-
H-

Question 7

Fructose

Answer 7

CH2OH  
     =O
HO---H
H-----OH
H-----OH
CH2OH

Question 8

Erythrose

Answer 8

CHO
H-OH
H-OH
CH2OH

sieht aus wie ein E

Question 9

Threose

Answer 9

CHO
HO-H
H-OH
CH2OH

Question 10

Ribose

Answer 10

CHO
H-OH
H-OH
H-OH
CH2OH

Question 11

2-Desoxy-D-Ribose

Answer 11

CHO
H-H
H-OH
H-OH
CH2OH

Question 12

D-Ribulose

Answer 12

CH2OH
   =O
H-OH
H-OH
CH2OH

Question 13

Cellulose vs Stärke

Answer 13

Cellulose - aus beta-Glucosemolekülen
beta-1,4-glycosidische Verknüpfung

Stärke
Amylose: alpha-1,4-glycosidische Verknüpfung
Amylopektin: alpha-1,6-glycosidische Verknüpfung

Question 14

Reduzierende Zucker

desoxyribose?

Answer 14

Ja

reduzierende Zucker enthalten ein hemiacetal