ACS BIOCHEMISTRY EXAM SCRIPT
COMPLETE QUESTIONS AND CORRECT
ANSWERS LEARNING RESOURCE
●● What is the L configuration of a sugar in a Fisher projection?
Answer: hydroxyl on left
●● What is the difference between glycogen and amylopectin?
Answer: glycogen- has branches about every 10 residues (more highly
branched)
amylopectin- has branches about every 25
●● What is amylose made up of?
Answer: glucose
●● What makes up starch?
Answer: amylose
amlyopectin
●● What is a glycosidic bond?
Answer: links two monosaccharides together at points 1 and 4
, ●● What is the difference between an alpha(1-4) and beta(1-4) linkage?
Answer: alpha: when the oxygen is pointed down in a glycosidic bond
beta: when the oxygen is pointed up in a glycosidic bond
●● What is the definition of a carbohydrate?
Answer: all have hydroxyl and carbonyl functional groups
●● Difference between aldose and ketose
Answer: aldose has an aldohyde
ketose has a ketone
●● What makes up sucrose?
Answer: fructose and glucose monosaccharides
●● What makes up lactose?
Answer: glucose and galactose monosaccharides
●● What makes up mannose?
Answer: two glucose monosaccharides
COMPLETE QUESTIONS AND CORRECT
ANSWERS LEARNING RESOURCE
●● What is the L configuration of a sugar in a Fisher projection?
Answer: hydroxyl on left
●● What is the difference between glycogen and amylopectin?
Answer: glycogen- has branches about every 10 residues (more highly
branched)
amylopectin- has branches about every 25
●● What is amylose made up of?
Answer: glucose
●● What makes up starch?
Answer: amylose
amlyopectin
●● What is a glycosidic bond?
Answer: links two monosaccharides together at points 1 and 4
, ●● What is the difference between an alpha(1-4) and beta(1-4) linkage?
Answer: alpha: when the oxygen is pointed down in a glycosidic bond
beta: when the oxygen is pointed up in a glycosidic bond
●● What is the definition of a carbohydrate?
Answer: all have hydroxyl and carbonyl functional groups
●● Difference between aldose and ketose
Answer: aldose has an aldohyde
ketose has a ketone
●● What makes up sucrose?
Answer: fructose and glucose monosaccharides
●● What makes up lactose?
Answer: glucose and galactose monosaccharides
●● What makes up mannose?
Answer: two glucose monosaccharides