active transport Flashcards
1
Q
active transport
A
moving molecules against a gradient or electrochemical gradient using energy supplied by cell
2
Q
what does AT use
A
a carrier protein
3
Q
energy for AT
A
ATP
4
Q
AT pase
A
enzyme that catalyses hydrolysis of ATP
5
Q
direction of AT
A
one way because only move in direction required for cell
6
Q
steps of AT with carrier protein
A
molecules out from low to high
protein carrier changed shape to allow molecule in and requires ATP
-molecule carrier across membrane in protein shape
- protein carrier returns to shape
7
Q
evidence for active transport with ATP
A
- only takes place in living cells
-rate depends on oxygen and temp
-cells need mitochondria for ATP
8
Q
page 221
A
9
Q
cell transport mechanisms PMT
A
10
Q
A
