Question

water flows through a selectively permeable membrane in a process called __, but water molecules cross the membrane more easily through channels of transmembrane proteins called __.
multiple choice
filtration; aquaporins
osmosis; water pumps
filtration; water pumps
osmosis; uniport
osmosis; aquaporins

Explanation:

• Osmosis is the process of water flowing through a selectively permeable membrane.
• Aquaporins are transmembrane proteins that facilitate the easy passage of water molecules across the membrane.
• Filtration is a different process (e.g., in the kidneys, physical force drives fluid through a filter).
• "Water pumps" is not a standard term for these channels.
• Uniport refers to a type of transport for a single substance but not specifically for water channels like aquaporins.

Answer:

E. osmosis; aquaporins