Active Transport

Question 1

Name an example of active transport

Answer 1

Uptake of ions by plant roots

Question 2

Factors that effect the rate of active transport (4)

Answer 2

Oxygen levels
Temperature
Amount of protein carriers
Respiratory poisons (cyanide)

Question 3

Describe how active transport occurs through a carrier vesicle

Answer 3

Molecules combined with the carrier proteins

ATP attaches to carrier protein

Carrier protein changes shape, the molecule is exposed to the inside of the membrane

The molecule is released, carrier protein reverts to the original shape.

Question 4

Define active transport

Answer 4

Molecules move through a protein carrier against their concentration gradient this method requires energy in the form of ATP