Lactose is a disaccharide composed of a 1-4 glycosidic bondbetween galactose and glucose.A) Is lactose a reducing sugar? B) Label the glucose and galactose rings on the lactose structure to theright. C) Circle the anomeric positions. Circle oneThe anomeric position of the acetal is Alpha BetaThe anomeric position of the hemiacetal is Alpha BetaD) What is the relationship between glucose and galactose? E) Give a specific acid mechanism hydrolyzing lactose into glucoseand galactose. Show lone pairs on the oxygen atoms directly involved in each step, show formal charges, correctly use arrows, and do not skip steps.
Lactose is a disaccharide composed of a 1-4 glycosidic bondbetween galactose and glucose.A) Is lactose a reducing sugar? B) Label the glucose and galactose rings on the lactose structure to theright. C) Circle the anomeric positions. Circle oneThe anomeric position of the acetal is Alpha BetaThe anomeric position of the hemiacetal is Alpha BetaD) What is the relationship between glucose and galactose? E) Give a specific acid mechanism hydrolyzing lactose into glucoseand galactose. Show lone pairs on the oxygen atoms directly involved in each step, show formal charges, correctly use arrows, and do not skip steps.
Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter25: Carbohydrates
Section: Chapter Questions
Problem 25.36P
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Question
Lactose is a disaccharide composed of a 1-4 glycosidic bond
between galactose and glucose.
A) Is lactose a reducing sugar?
B) Label the glucose and galactose rings on the lactose structure to the
right.
C) Circle the anomeric positions. Circle one
The anomeric position of the acetal is Alpha Beta
The anomeric position of the hemiacetal is Alpha Beta
D) What is the relationship between glucose and galactose?
E) Give a specific acid mechanism hydrolyzing lactose into glucose
and galactose. Show lone pairs on the oxygen atoms directly involved in each step, show formal charges, correctly use arrows, and do not skip steps.
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