Chem 471 | Problem Set 7 | Due Mon Mar 29 2010
Chapter 7 - Multiple Choice Questions - Choose one best answer
When two carbohydrates are epimers:
- one is a pyranose, the other a furanose.
- one is an aldose, the other a ketose.
- they differ in length by one carbon.
- they differ only in the configuration around one carbon atom.
- they rotate plane-polarized light in the same direction.
Which of following is an anomeric pair?
- D-glucose and D-fructose
- D-glucose and L-fructose
- D-glucose and L-glucose
- α-D-glucose and β-D-glucose
- α-D-glucose and β-L-glucose
When the linear form of glucose cyclizes, the product is a(n):
Which of the following is not a reducing sugar?
From the abbreviated name of the compound Gal(β1 → 4)Glc, we know that:
- C-4 of glucose is joined to C-1 of galactose by a glycosidic bond.
- the compound is a D-enantiomer.
- the galactose residue is at the reducing end.
- the glucose is in its pyranose form.
- the glucose residue is the β anomer.
Starch and glycogen are both polymers of:
Which of the following is a heteropolysaccharide?
Glycoconjugates: proteoglycans, glycoproteins, and glycolipids (2)
The basic structure of a proteoglycan consists of a core protein and a:
In glycoproteins, the carbohydrate moiety is always attached through the amino acid residues:
- asparagine, serine, or threonine.
- aspartate or glutamate.
- glutamine or arginine.
- glycine, alanine, or aspartate.
- tryptophan, aspartate, or cysteine.
Carbohydrates as informational molecules: the sugar code (1)
The biochemical property of lectins that is the basis for most of their biological effects is their ability to bind to:
- amphipathic molecules.
- hydrophobic molecules.
- specific lipids.
- specific oligosaccharides.
- specific peptides.