Question

________ are specialized membrane proteins that transport water across cell membranes.

○ recognition proteins
○ enzymes
○ receptor proteins
○ aquaporins

Explanation:

Aquaporins are specialized membrane - proteins that facilitate the transport of water across cell membranes. Recognition proteins are involved in cell - cell recognition, enzymes catalyze biochemical reactions, and receptor proteins bind to specific signaling molecules.

Answer:

Aquaporins