5131415 5 A type of transport of a solute across a membrane

5,13,14,15

5. A type of transport of a solute across a membrane, against its concentration gradient, using protein carriers are driven by the expenditure of chemical energy is known as A. osmosis. B. diffusion. C. facilitated transport. D. active transport. E. exocytosis.

Solution

5. D. Active transport.

Metabolic energy in the form of ATP s used to transport molecules in active transport through protein channels.

13. B.Facilitated diffusion.

This is the movement of specific molecules down a concentration gradient, passing through the
membrane via a specific carrier protein. GLucose is transported in this way.

14.A. Move from areas f high concentration to areas of lesser concentratoin until an equilibrium is reached.

15.A. The carrier molecule must be specific to the molecule that is transported. The direction of movement is always from high to low concentration.