9. Transport Across Membranes

Transporter proteins transport solutes across the membrane via which of the following mechanisms?

Which of the following is an example of active transport across a cell membrane?

In the context of transmembrane transport, what is the key difference between simple diffusion and facilitated diffusion across a biological membrane?

In the context of principles of transmembrane transport, which statement correctly describes the difference between simple diffusion and facilitated diffusion across a cell membrane?

In the context of principles of transmembrane transport, when would a cell have to use active transport to move a solute across the plasma membrane?

In the context of principles of transmembrane transport, which molecule is directly used as an energy source for primary active transport across the plasma membrane?

In the context of principles of transmembrane transport, which type of cell transport requires an input of energy (e.g., ATP or an ion gradient) to move substances across a membrane?

In the context of transmembrane transport, what is the main difference between simple diffusion and facilitated diffusion across a lipid bilayer?

In the context of transmembrane transport, which statement best describes how active transport differs from simple diffusion across a lipid bilayer?

Which of the following sets correctly lists three major types of active transmembrane transport used by cells?

Which of the following is an example of active transmembrane transport (requires energy input to move a solute against its electrochemical gradient)?

Which of the following is an example of active transport across a cell membrane?

In the context of transmembrane transport, which statement best distinguishes active transport from facilitated diffusion?

In the context of principles of transmembrane transport, why does active transport require an input of energy (e.g., ATP hydrolysis or an ion gradient)?

In the context of principles of transmembrane transport, what does it mean that the cell membrane is selectively permeable?