the mitochondria!
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The Mitochondria!. Review of Membranes…. D. G. A. F. C. B. E. B. C. A. G. D. E. F. MITOCHONDRIA. Which of the following can get into the outer membrane?. Outer membrane with porins. Outer compartment (cytosol). Inner membrane with Cristae . Enzymes! - PowerPoint PPT PresentationTRANSCRIPT
The Mitochondria!
Review of Membranes…
A
BC
D
E
F
G
AB C
F
E
D
G
Outer membrane with porins
Outer compartment (cytosol)
Inner membrane with Cristae
MatrixEnzymes! Hexokinase (adds P to ADP) and Dehydrogenases (catalyze redox reactions)
Which of the following can get into the outer membrane?
MITOCHONDRIA
Mitochondria • Double membrane
– outer membrane– inner membrane
• highly folded cristae• enzymes & transport
proteins– intermembrane space
• fluid-filled space between membranes
intermembranespace inner
membrane
outermembrane
matrixcristae
Mitochondria — Structure• Double membrane energy harvesting organelle
– smooth outer membrane– highly folded inner membrane
• cristae– intermembrane space
• fluid-filled space between membranes– matrix
• inner fluid-filled space– DNA, ribosomes– enzymes
• free in matrix & membrane-bound
mitochondrialDNA
What cells would have a lot of mitochondria?
Mitochondria – Function
What does this tell us about the evolution of eukaryotes?
Endosymbiosis!
Dividing mitochondriaWho else divides like that?
Advantage of highly folded inner membrane?More surface area for membrane-bound enzymes & permeases
Membrane-bound proteinsEnzymes & permeases
bacteria!
The Real Deal
The Real Deal
Enzymes on the Outside
• Hexokinases- adds P onto ADP
• Dehydrogenases- catalyze REDOX– Transfers electrons (H) to an acceptor NAD or FAD
• FAD and NAD are electron carriers