Mitochondria

Question 1

what is the function of the outer membrane?

Answer 1

for compartmentalisation

Question 2

what is the adaptation of both the outer and inner membrane?

Answer 2

permeable to pyruvate, o2, ADP, ATP, Pi (inorganic phosphate), co2, h2o

Question 3

describe the structural adaptation of the inner membrane (4)

Answer 3

1. consist of infoldings
   - increase SA:V to provide space for complexes of ETC for greater access to enzymes in matrix and vice versa
2. selectively permeable
   - has enzymes facilitating mvt of selective materials across it
3. presence of ATP synthase, specific for ATP synthesis
4. impermeable to H+, allow accumulation of H+ in intermembrane space

Question 4

describe the adaptations of the matrix (2)

Answer 4

1. presence of enzymes controlling Krebs cycle

2. presence of mitochondrial DNA,RNA and ribosomes involved in synthesis of mitochondrial proteins