BIO 202 Lecture 19

BIO 202 Lecture 19 - Cellular Respiration 2: Krebs Cycle,...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Cellular Respiration 2: Krebs Cycle, Oxidative Phosphorylation, Fermentation, Control of Respiration
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Mitochondria • ~ 1-10 µ m long • Have a double membrane • Are the sites for cellular respiration • They have their own genome and are thought to have evolved from prokaryotic symbionts • Cellular respiration enzymes are in the matrix and in the inner membrane
Background image of page 2
ATP synthesis (on cristae of inner membrane) Metabolic steps of respiration (in matrix) Mitochondrion
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The Krebs cycle • Named after Hans Krebs who discovered it in the 1930s • 8 steps (do not require oxygen) – Input: Acetyl CoA from glycolysis, NAD + , ADP , FAD + – Output: ATP , NADH , FADH 2 , CO 2 • All other intermediates are recycled within the Krebs cycle
Background image of page 4
The Krebs cycle: overview [1 glucose] 2 pyruvate 2 Acetyl-CoA 6 NADH + 2 ATP + 2 FADH 2 2 carbons enter 2 carbons leave 2 NADH ( FAD = flavin adenine dinucleotide )
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Energy of NADH/FADH 2 is converted to ATP 2 ATP 2 NADH 2 NADH Krebs Cycle 2 ATP 6 NADH 2 FADH 2 Glycolysis 2 Pyruvate 2 Acetyl CoA ? ATP How is ATP made using NADH/FADH 2 ?
Background image of page 6
4 ATP made 2 ATP spent 2 FADH 2 lose 2 ATP 1 NADH ~~> 3 ATP 1 FADH 2 ~~> 2 ATP Usually ~32 ATP Cellular respiration: energy yields CYTOSOL MITOCHONDRION
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 go to the electron transport chain to supply energy for production of ATP ATP is produced by oxidative phosphorylation Oxidative phosphorylation
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 22

BIO 202 Lecture 19 - Cellular Respiration 2: Krebs Cycle,...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online