Photosynthesis

and

Respiration

Metabolism

The total of all chemical reactions that take place in an organism. Most chemical reactions in an organism require enzymes. An enzyme is a protein that speeds up a chemical reaction.

Photosynthesis

• The process of converting light energy into chemical energy and storing that energy in the bonds of a sugar (glucose)

•Producers – including plants, algae and some bacteria – are photosynthetic

•Takes place in the chloroplast of a cell

• carbon dioxide + water → glucose + oxygen CO2 + H2O → C6H12O6 + O2

Photosynthesis

Almost all living things depend on sunlight!

carbon dioxide

Sunlight(energy)

oxygen

glucosewater

Cellular Respiration

Respiration – the process in which chemical reactions break down food molecules into simpler substances and release stored energy. There are two types of cellular respiration – aerobic and anaerobic.

Aerobic Respiration

• Uses oxygen to release energy from glucose in order to generate a maximum of 38 ATP (adenosine triphosphate)

• Occurs in both producers and consumers

Aerobic Respiration

Step Glycolysis Kreb’s Cycle

Electron Transport

Chain

Occurs In Cytoplasm Mitochondria

glucose + oxygen → carbon dioxide + water C6H12O6 + O2 → CO2 + H2O

Aerobic Respiration

oxygen

glucose

carbon dioxide

water

ATP(energy)

Anaerobic Respiration

•Does not use oxygen to release energy from glucose and only generates 2 ATP. This occurs when there is no oxygen or not enough oxygen for aerobic respiration.•Occurs in both producers and consumers.•Takes place in the cytoplasm.•Products include carbon dioxide, lactic acid and alcohol.

Photosynthesis vs. Cellular Respiration

Photosynthesis Respiration

Reactants carbon dioxide and water

glucose and oxygen

Products glucose and oxygen carbon dioxide and water

Where it Occurs chloroplast cytoplasm and mitochondria

When it Occurs In the light anytime

Occurs in Producers?

Yes Yes

Occurs in Consumers?

No No

Photosynthesis vs. Cellular Respiration

sunlight(energy)

ATP (energy)

glucose + oxygen

carbon dioxide + water