1. Stores energy in sugar molecules
2. Uses carbon dioxide and water
3. Increases weight
4. Occurs only in light
5. Occurs only in cells containing chlorophyll
6. Produces oxygen in green organisms
7. Produces ATP with light energy
1. Releases energy from sugar molecules
2. Releases carbon dioxide and water
3. Decreases weight
4. Occurs in either light or darkness
5. Occurs in all living cells
6. Utilizes oxygen (aerobic respiration)
7. Produces ATP with energy released from sugar cycle yield two molecules of ATP, two molecules of FADH2 (from which four ATP are formed), and six molecules of NADH (which cause the formation of 18 molecules of ATP), making a citric acid cycle total of 24 ATP. A grand total of 36 ATP is produced for the aerobic respiration of one glucose molecule (Table 10.1). The 36 ATP molecules represent about 39% of the energy originally present in the glucose molecule. The remaining energy is lost as heat or is unavailable. Aerobic respiration is still about 18 times more efficient than anaerobic respiration.
A condensed comparison between photosynthesis and respiration is shown in Table 10.2.
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