Membrane Transport Systems

Question 1

ATP-ADP Transport

Answer 1

Adenine nucleotide carrier transports one ADP into the mito while exporting one ATP into the cytosol

Atractyloside inhibits transport, resulting in depletion of ADP inside the mito

Question 2

Glycerophosphate shuttle

Answer 2

DHAP reduced to G3P in cytosol
G3P brought into IMM
G3P oxidized to DHAP
Yields 2 ATP

Question 3

Malate-Aspartate shuttle

Answer 3

Malate comes into MM and is oxidized
Uses 1 NADH+H to directly create another NADH+H in the matrix
Aminotransferase transfers alpha amino group from glutamate to oxaloacetate to make aspartate and alpha-ketoglutarate which get transferred back into the cytosol
Yields 3 ATP