Which one of the following is considered an integral membrane protein?a protein capable of diffusing throughout the cytoplasm of a cell. a protein attached to a phospholipid via ionic bonding with the head group of the lipid molecule. a protein attached to a transmembrane protein via hydrogen bonding. a protein with one end in the cytoplasm and the other end in the extracellular space

Answer 1

An integral membrane protein is best described by the option: "a protein with one end in the cytoplasm and the other end in the extracellular space."

Integral membrane proteins span the lipid bilayer of the membrane, meaning they have regions that are embedded within the hydrophobic core of the membrane, with parts exposed to both the cytoplasm and the extracellular environment. This distinguishes them from peripheral proteins, which are typically found on the surface of the membrane or are loosely attached.