BIO NMDCAT

Even when bound to basic proteins, the dense phosphate backbone of the DNA molecule provides a strong net negative charge to chromatin.

N-linked glycosylation targets the nitrogen atom on the side chain of an asparagine residue within a specific consensus sequence.

Liver cells require protein synthesis to form VLDLs; blocking this prevents lipid export, causing fats to accumulate internally.

Gangliosides are abundant in nerve cell membranes, where they participate in cell signaling, myelin stability, and synaptogenesis.

The molecule develops dual properties: a hydrophobic domain anchored in the lipid bilayer and a hydrophilic domain exposed to water.

LDL transports cholesterol from the liver to peripheral tissues; excess circulating LDL can oxidize and deposit in arterial walls.

Cytochromes are electron-transporting metalloproteins whose iron center alternates between Fe2+ and Fe3+ states to transfer electrons.

Ribosomes are functional structural complexes consisting of ribosomal RNA (rRNA) and specific ribosomal proteins working together.

Mucus contains mucins, which are heavily glycosylated glycoproteins that trap pathogens and protect delicate mucosal surfaces.

Lipopolysaccharides (LPS) contain a lipid A anchor component covalently bound to a core oligosaccharide and an O-antigen chain.

Hydroxyl groups on sugar residues form hydrogen bonds with surrounding water molecules, rendering the region highly hydrophilic.

The glycocalyx acts as a cellular fingerprint; individual combinations of sugar chains allow immune cells to distinguish self from non-self.

Human ABO blood group determinants are defined by the structural variations of carbohydrate chains on surface glycolipids and glycoproteins.

Mannose-6-phosphate serves as a specific molecular sorting signal that targets newly synthesized hydrolytic enzymes to the lysosomes.

Galactolipids and cerebrosides, which are types of glycolipids, are heavily concentrated in the nervous system's myelin sheath.

Lipoproteins feature a hydrophilic protein shell that encloses a hydrophobic lipid core, allowing transport in aqueous blood plasma.

Glycoproteins and glycolipids extend their sugar chains outward to form the glycocalyx, which mediates cellular identification.

N-linked glycosylation begins in the lumen of the rough endoplasmic reticulum as polypeptides are being translated by ribosomes.

Conjugated molecules like glycoproteins and glycolipids are stable because their components are bound via permanent covalent linkages.