How does the heterogeneity of oligosaccharide portions in glycoconjugates differ from homogeneity?

In a biochemical experiment, you identify an oligosaccharide with a free anomeric carbon. What does this indicate about the oligosaccharide's directionality?

Which amino acid residues are involved in O-linked glycoproteins?

In a signaling pathway, a glycolipid is found to be crucial for signal transduction. What might be the consequence of a mutation that disrupts the oligosaccharide portion of this glycolipid?

Which of the following is NOT a component of glycoconjugates?

In glycoprotein synthesis, which atom of the amino acid residue's R group does the anomeric carbon typically bond with in O-linked glycoproteins?

A cell's ability to respond to external signals is compromised due to a defect in its glycoproteins. What might be the underlying issue?