Question

a) Which of these is not a feature of symplastic movement

	A.	Influenced by temperature and oxygen
	B.	Moves in the cytoplasm
	C.	Requires no energy
	D.	Requires specific carriers

b)Suberin is a waxy ___________ substance in the cell walls of the ____________. At this point, ions must cross a _________________ to continue traveling to the xylem.

		hydrophobic, root hair, cell membrane
		hydrophyllic, Casparian strip, membrane
		hydrophobic, endodermis, cell membrane
		hydrophobic, Casparian Strip, cell wall

Answer 1

Answer a)

Option. Requires specific carrier.

Symplast pathway formed by the system of interconnected protoplasts of diferent cels. Neighbouring cells are connected through cytoplasmic strands that extend through plasmodesmata.

During symplasic rnovement, the water travels through the cells-their cyloplasm; intercellular movement is throughth plasodesmata. Water has to enter the cels through the cell membrane, hence movement is eatively sover, movement is again down a potential gradient. Symplastic movement may be aided by gtoplasmic steaming.

Answer b)

Option. Hydrophobic, Casparian Strip, cell wall.