Cell Transport in Plants

During plasmolysis what occurs?

• Movement of water occurs across the membrane from an area of higher water potential to lower water potential

• Movement of water occurs across the membrane from an area of low water potential to high water potential

• Water moves inside the cell until equilibrium is reached

• O. P. of cell remains the same

When a plasmolysed cell is placed in water or hypotonic solution, what happens?

• T.P. of cell decreases

• T.P. of cell becomes zero

• T.P. increases

• Water potential of cell decreases

Mass or bulk flow of substance is called –

• Active transport

• Translocation

• Diffusion

• Facilitated diffusion

Tags

NGSS.HS-LS2-3

Unidirectional flow of water, minerals, some organic nitrogen and hormones occurs through –

• Xylem

• Phloem

• Root

• Vascular tissue

Multidirectional flow of a variety of organic and inorganic solutes occurs through –

• Xylem

• Vascular tissue

• Phloem

• Root

Which of the following is the part of apoplast?

• Cell wall

• Plasma membrane

• Plasmodesmata

• Cytoplasm

Water moving through the apoplast from the soil to stele cells must crosses a plasma membrane in the cells of

• Root hairs

• Cortex

• Endodermis

• Vessel

__________ are generally moved by a mass or bulk flow system.

• Water and minerals

• Water and organic molecule

• Water, minerals and food

• Only water

Endodermal cells differ from other cells in root. They –

• Lack symplast region

• Have a high rate of water transport

• Are completely surrounded by a waxy layer

• Prevent water and ions from moving between them

Cell walls impregnated with water repellent suberin are found in the cells of –

• Endodermis

• Pericycle

• Trancheids

• Root hairs