Active Transport

Question 1

Active transport

Answer 1

Movement of molecules or ions from a region of lower concentration to a region of higher concentration
Ensures more rapid uptake of molecules/ions
Requires metabolic energy (from respiration) in the form of ATP
Involves a carrier protein

Question 2

Similarities between facilitated diffusion and active transport

Answer 2

Both use carrier proteins
Specific binding sites for the molecules or ions being transported

Question 3

Differences between facilitated diffusion and active transported

Answer 3

Facilitated diffusion
- low to high concentration
- no metabolic energy/energy from ATP required
Active transport
- low to high concentration
- requires energy from ATP

Question 4

Why do poisons that inhibit respiration result in active transport stopping?

Answer 4

Active transport requires energy from ATP
Inhibit respiration then no ATP formed

Question 5

Why does the over-watering of plants kill the plants?

Answer 5

Active transport requires energy from ATP
If plants are over-watered then the soil becomes water logged and root cells cannot get enough oxygen for aerobic respiration
Mineral ions transported into root cells by active transport
Water moves into root cells down water potential gradient