GRE Subject Test: Chemistry : Carbohydrates

Study concepts, example questions & explanations for GRE Subject Test: Chemistry

varsity tutors app store varsity tutors android store

Example Questions

Example Question #1674 : Mcat Biological Sciences

Which type of bond is created between carbohydrates and the sidechain amine of select asparagine residues in proteins?

Possible Answers:

Neither is correct

Both are correct



Correct answer:



A glycosidic bond covalently joins a carbohydrate molecule to another molecule. An O-glycosidic bond is a covalent linkage between a carbohydrate and a protein, joining a serine or threonine hydroxyl side chain and a sugar (oxygen in the bond yields "O"). An N-glycosidic linkage involves bonding of a carbohydrate and a protein, joining an asparagine side chain amide and a sugar (nitrogen in the bond yields "N"). Thus, N-glycosidic is the correct answer.

Learning Tools by Varsity Tutors