Ch 8 Photosynthesis. Chemical Energy and ATP energy is the ability to do work cells use energy to build new molecules, contract muscles, and carry out

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Ch 8 Photosynthesis

Ch 8 Photosynthesis

Chemical Energy and ATPenergy is the ability to do workcells use energy to build new molecules, contract muscles, and carry out active transportw/o ability to obtain and use energy, life would cease to existadenosine triphosphate (ATP) one of most important compounds cells use to store and releasecells release energy stored in ATP by breaking bonds between phosphate groups

Heterotrophs and Autotrophsautotrophs - organisms that make their own foodphotosynthesis - process by which autotrophs use the energy of sunlight to produce high-energy carbohydrates for food plants, algae, and some bacteria are able to use light energy from the sun to produce foodheterotrophs - organisms that obtain food by consuming other living thingsget food by: eating plants, feeding on plant-eating animals, or decomposing other organisms

Heterotrophs and Autotrophs

Lightall energy everywhere originates from the suntravels to Earth in the form of lightsunlight = different wavelengths, visible light spectrum: rainbowcompound that absorbs light absorbs energychlorophyll absorbs visible light very well

Pigmentsplants gather the suns energy with light-absorbing molecules called pigmentsprincipal pigment is chlorophyllabsorb light very well in all regions except green -> reflects green light -> why plants look greencolder temps -> chlorophyll breaks down, the red and orange pigments may be seen

Chloroplastsphotosynthesis takes place inside chloroplastschloroplasts contain saclike photosynthetic membranes called thylakoidsarranged in stacks known as granachlorophyll located

An Overview of Photosynthesisuses the energy of sunlight to convert H2O and CO2 (reactants) into high-energy sugars glucose and oxygen (products)plants use sugars to produce complex carbs (starches) that are used for energy


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