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Section 8-1 Energy and Life.

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Presentation on theme: "Section 8-1 Energy and Life."— Presentation transcript:

1 Section 8-1 Energy and Life

2 Autotrophs vs. Heterotrophs
Autotrophs – organisms, such as plants that make their own food. Heterotrophs – organisms, such as animals, that must consume food in order to obtain energy.

3 Adenosine Triphosphate (ATP)
Adenosine Triphosphate (ATP) – chemical compound that cells use to store and release energy Consists of adenine, a 5-carbon sugar called ribose, and three phosphate groups.

4 ATP (cont) Energy is released by breaking the chemical bond between the second and third phosphates.

5 9.2 Photosynthesis: Trapping the Sun’s Energy
Process plants use to trap the sun’s energy and build glucose that store energy 6CO2 + 6H2O → C6H12O6 + 6O2 carbon + water glucose + oxygen dioxide (sugar)

6 Photosynthesis occurs in the chloroplasts.
Chloroplasts contain the pigment chlorophyll. Chlorophyll molecules trap the sunlight so photosynthesis can occur.

7 9.3 Getting Energy to Make ATP
Cellular Respiration Process by which mitochondria break down food to produce ATP. Converts glucose to carbon dioxide and water. C6H12O6 + O2→CO2 + H2O

8 Aerobic vs. Anaerobic Respiration
Anaerobic – does not require oxygen Aerobic – does require oxygen

9 Photosynthesis and cellular respiration are opposite processes.
The reactants of one process are the products of the other

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