Please state if the statements are true or false. 1. An l-sugar is a sugar where the -OH group at the penultimate carbon is oriented to the left 2. The citric acid cyle occurs in the cytoplasm

15.

All sugar residues are in their D-isomeric forms.  The second sugar residue is an epimer of:   A. altrose at C2.   B. glucose at C3.   C. altrose at C4.   D. glucose at C4.   E. talose at C4.

please help question 1, a-d Correctly please.

3

Part d pls

What is a glycoconjugate? Choose all that apply. a. A glycoconjugate is a glycolipid or a glycoprotein b. A glycoconjugate is a term that is used to describe the addition of sugars to other biomolecules c. A glycoconjugate is a term that is used to describe the addition of sugars to other biomolecules   3. What is the glycocalyx? a. The glycocalyx describes the various symbols used to designate individual monosaccharides b. The glycocalyx is the complete ensemble of glycoconjugates and glycans at the cell surface c. The glycocalyx is a glycan that is made synthetically d. None of these are correct e. All of these are correct

6. What is a glycosyltransferase? Choose all that apply Group of answer choices Catalyzes the formation of a bond between a sugar and an amino acid An enzyme that cleaves a glycosidic bond An enzyme that catalyzes the formation of a glycosidic bond An enzyme that transfers nucleotide-sugars from the cytoplasm   7.  Which statement(s) is/are true about inverting and retaining glycosyltransferases?  a. Inverting glycosyltransferase catalyzes the epimerization of a sugar b. Inverting glycosyltransferase alters the anomeric configuration of the glycosyl donor c. Retaining glycosyltransferase never preserves the anomeric configuration of the glycosyl donor d. Inverting glycosyltransferase switch the order of acceptor and donor. e. An SN1 reaction mechanism results in exclusive retention of stereochemistry of the anomeric carbon