Day 3 - Ox. Phos.

Question 1

The inner membrane is impermeable to small molecules, except for which 4 molecules?

Answer 1

O2, CO2, H2O, NH3

Question 2

The outer membrane is permeable or impermeable to small molecules?

Answer 2

permeable

Question 3

Intermembrane space pH vs. matrix pH

Answer 3

Matrix pH = High pH Intermembrane Space = low pH

Question 4

What important processes occur in the matrix?

Answer 4

TCA cycle, Beta oxidation of fatty acids, parts of Urea cycle, pyruvate dehydrogenase activity, and storage of Ca2+ ions.

Question 5

Correlation Box -Ferredoxins - do what?

Answer 5

carry electrons in p-450 systems of mitochondria. Family members transfer electrons between each other by oxidation and reduction of Fe.

Question 6

Correlation Box - Cytochrome-c and apoptosis -

Answer 6

Cytochrome-c carries electrons between complexes III & IV. Cytochrome -c can be released from membrane, leads to caspase activation ( = executioners of apoptosis)

Question 7

Correlation Box - Respiratory chain components encoded by mtDNA

Answer 7

mtDNA replicates independently