In conditions of dehydration, plant cells can increase their water retention by regulating thefunction of some or all of their aquaporins, membrane-bound protein channels that allowwater to move through the cell membrane via facilitated diffusion.Which of the following describes a likely mechanism by which aquaporins can be used toregulate the movement of water across the plant cell membrane?ABсDSynthesis of additional aquaporins by the plant cell ribosomes will allow the cell to coun-teract the movement of water out of the cell.Inhibition of ATP hydrolysis will make the aquaporins unable to remove water from thecell and cause more water to remain in the cell.Inactivation of aquaporins will make water molecules unable to move across the plantcell membrane and allow more water to remain in the cell.Inhibition of the plant cell Golgi apparatus will decrease the production rate of vesiclesand slow down the exocytosis of water molecules.

Movement of molecules across the plasma membrain depends on their concentration gradient and chemical properties. Different membrane proteins helps in this transportation process.In dehyderated condition the plant cells need to conserve water by limiting the movement of water out of the cells. Aquaporin is a channel protein that is responsible for the transportation of water by facilitated diffusion. This channel protein is present in the plasma membrane that allow the movement of water out of the cell along their concentration gradient. So, in water deficit condition the aquaporin must be inhibited for the conservation of water. This will inhibits the movement of water out of the cells. Options are: A. Synthesis of more aquaporin is responsible for more water loss because it causes release of water out of the cells. B. Aquaporin is involved in facilitated diffusion that and do not needs ATP hydrolysis to work. It is a type of passive transport. C. Inactivation of aquaporin will make water molecule unable to move across the plant cell membrane and allow more water to remain in the cells during dehydrated condition. D. Water molecules are not released out of the cell by exocytosis mechanism. Hence, option C is the right answer.