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Flashcards in Cellular Respiration Deck (14):
1

Cellular Respiration

A series of chemical reactions that occur in a cell to produce energy for the cell.

2

ATP

Readily available energy. Bond between second and third phosphate is really strong. When energy is needed for some process in the cell, cell will hydrolyze the bond which releases energy.

3

Glucose

Primary Source of cellular food. Can be broken down to make ATP.

4

Glycogen

Many glucose molecules bonded together - its purpose is to store energy.

5

Electron Carriers

Stores energy as electrons on molecules called electron carriers.
NAD+ and FAD

6

Glycolysis

Sugar Splitting. One molecule of glucose split into two molecules of pyruvate. Anaerobic

7

Pyruvate

1 pyruvate = 1/2 glucose

8

Pyruvate Dehydrogenase Complex (PDC)

A group of enzymes - prepares pyruvate to enter Krebs Cycle. The pyruvate from glycolysis produces more reduced electron carriers and ATP. Aerobic

9

Krebs Cycle

First molecule (glucose) is regenerated each time cycle is competed. Aerobic

10

Electron Transport and Oxidative Phosphorylation

Goal is to return electron carriers to "empty state"

11

Electron Transport Chain

NAD and FADH2 hand electrons to chain of carrier molecules - electrons are eventually given to oxygen, which forms water. Aerobic.

12

ATP Synthase

Special Protein - allows H+ ions out of mitochondrial matrix and into space space between membranes and less H+ in the matrix.

13

Fermentation

Regenerating empty electron carriers in the absence of oxygen.

14

Problems with fermentation

- End products, ethanol or lactic acid, are toxic.
- Only get 2 ATP, not enough to survive.