Practice Questions

GPI anchors use a complex bridge made of a phospholipid linked via a phosphodiester bond to an oligosaccharide, which then binds the protein.

This structural packaging arranges DNA strands systematically inside the eukaryotic nucleus, compacting the genetic material.

Ovalbumin is a storage glycoprotein that makes up the bulk of egg white, providing essential amino acids and attached carbohydrates.

The carbohydrate arrays on glycoprotein hormones are essential for maintaining proper folding, structural stability, and receptor activation.

Standard glycolipids feature small oligosaccharide chains, whereas bacterial LPS molecules possess highly complex, extended carbohydrate structures.

snRNPs ("snurps") are specialized nucleoproteins that combine to build the spliceosome, the machinery that removes non-coding introns.

Apolipoproteins act as structural scaffolding, activate lipid-processing enzymes, and serve as cell-surface ligands for target tissue receptors.

Phosphoproteins, like milk casein or egg vitellin, are generated when phosphate groups attach covalently to serine, threonine, or tyrosine.

Without working receptors, cells cannot internalize LDL particles via receptor-mediated endocytosis, causing cholesterol to build up in the blood.

Both classes contribute to the structural cell coat by projecting their hydrophilic branched sugar chains into the extracellular space.