Plant Cell Turgor Pressure and Aquaporins Quiz

What is the main source of energy for active transport across the cell membrane?

Urea

Glycerol

Aquaporins

ATP (correct)

Which of the following is a function of aquaporins in living cells?

Transporting glycerol

Generating hydrostatic pressure

Facilitating water flow (correct)

Regulating turgor pressure

What is the role of coupled transport in cells?

Directly utilizing aquaporins

Allowing passive movement of solutes

Generating hydrostatic pressure

Indirectly using ATP for transport (correct)

Which type of protein carriers are involved in active transport across membranes?

Uniporters Signup and view all the answers

What distinguishes symporters from antiporters in active transport?

Same direction transport vs different direction transport Signup and view all the answers

Which process requires energy to move substances from regions of lower to higher concentration?

Active transport Signup and view all the answers

Which type of molecules can move through the hydrophobic lipid bilayer by simple diffusion?

Small, nonpolar molecules Signup and view all the answers

What kind of protein has a hydrophilic channel that allows polar molecules to pass through when the channel is open?

Channel protein Signup and view all the answers

In facilitated diffusion, the transported molecule is released on the other side of the membrane when it binds to which type of protein?

Carrier protein Signup and view all the answers

Which type of transport across the membrane moves substances freely by diffusion from regions of higher concentration to lower concentration?

Passive transport Signup and view all the answers

Which type of transport across the membrane is usually selective for one type of molecule, providing a selective permeable membrane?

Passive transport Signup and view all the answers

What is the role of the membrane protein described in the text?

Transport glucose into the cell Signup and view all the answers

How does the Na+ gradient drive sugar molecules into the cell?

By utilizing energy from ATP hydrolysis Signup and view all the answers

Which process is responsible for maintaining the Na+ gradient?

Na+ /K+ pump Signup and view all the answers

What is the function of ionophores in membrane transport processes?

Allow ions to diffuse through the lipid bilayer Signup and view all the answers

Which process involves the discharge of material from vesicles at the cell surface?

Exocytosis Signup and view all the answers

What occurs during receptor-mediated endocytosis?

Specific molecules bind to receptors before internalization Signup and view all the answers