Question

what is a protein that extends through the cell membrane called?

• polar
• hydrophilic
• transmembrane
• peripheral

Explanation:

• Polar refers to a molecular property, not a membrane protein type.
• Hydrophilic describes water-attracting molecules, not a membrane protein category.
• Transmembrane proteins span the entire cell membrane.
• Peripheral proteins only attach to the membrane surface, not extending through it.

Answer:

Transmembrane