ADP, ATP and Cellular Respiration

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Slide 15

Are There Any Other Electron Carriers?

YES! Another Coenzyme!

FAD+ (Flavin adenine dinucleotide)

Reduced to FADH2

Slide 16

Other Cellular Respiration Facts

Metabolic Pathway that breaks down carbohydrates

Process is Exergonic as High-energy Glucose is broken into CO2 and H2O

Process is also Catabolic because larger Glucose breaks into smaller molecules

Slide 17

What are the Stages of Cellular Respiration?

Glycolysis

The Krebs Cycle

The Electron Transport Chain

Slide 18

Where Does Cellular Respiration Take Place?

It actually takes place in two parts of the cell:

Glycolysis occurs in the Cytoplasm

Krebs Cycle & ETC Take place in the Mitochondria

Slide 19

Review of Mitochondria Structure

Smooth outer Membrane

Folded inner membrane

Folds called Cristae

Space inside cristae called the Matrix

Slide 20

Diagram of the Process

Occurs in Cytoplasm

Occurs in Matrix

Occurs across Cristae

Slide 21

Glycolysis Summary

Takes place in the Cytoplasm

Anaerobic (Doesn’t Use Oxygen)

Requires input of 2 ATP

Glucose split into two molecules of Pyruvate or Pyruvic Acid

Slide 22

Glycolysis Summary

Also produces 2 NADH and 4 ATP

Pyruvate is oxidized to Acetyl CoA and CO2 is removed

Slide 23

Glycolysis Diagram

Slide 24

Fermentation

Occurs when O2 NOT present (anaerobic)

Called Lactic Acid fermentation in muscle cells (makes muscles tired)

Called Alcoholic fermentation in yeast (produces ethanol)

Nets only 2 ATP

Slide 25

A Little Krebs Cycle History

Discovered by Hans Krebs in 1937

He received the Nobel Prize in physiology or medicine in 1953 for his discovery

Forced to leave Germany prior to WWII because he was Jewish

Slide 26

Krebs Cycle Summary

Requires Oxygen (Aerobic)