The bond between a glycoprotein and a carbohydrate is made to which atom of a monosaccharide?
A.
C-3
B.
C-6
C.
varies with different glycoproteins
D.
anomeric carbon
E.
C-4
Would the answer be (E) C-4?
c-3?
To determine the answer to this question, we need to understand the structure of monosaccharides and how they form bonds with other molecules, such as glycoproteins.
Monosaccharides are simple sugars that are the building blocks of carbohydrates. They have a backbone of carbon atoms, numbered from C-1 to C-N (depending on the number of carbon atoms in the monosaccharide).
In this case, the question specifically asks about the bond between a glycoprotein and a monosaccharide. A glycoprotein is a protein molecule that is covalently attached to a carbohydrate molecule.
The bond between a glycoprotein and a monosaccharide is typically formed by a glycosidic bond, which is a covalent bond between the anomeric carbon of the monosaccharide and a hydroxyl group on the glycoprotein.
The anomeric carbon of a monosaccharide refers to the carbon atom that is involved in the formation of a hemiacetal or hemiketal group. It is usually referred to as C-1 if the monosaccharide is in its linear form or C-2 if it is in its cyclic form.
Therefore, the correct answer to the question is (D) the anomeric carbon, as it is the carbon atom that typically forms the bond between a glycoprotein and a monosaccharide.