Photosynthesis

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Photosynthesis

Energy & Life

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Overview of Photosynthesis

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Autotrophs

Plants and some other types of organisms that contain chlorophyll are able to use light energy from the sun to produce food.

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Autotrophs

Autotrophs include organisms that make their own food

Autotrophs can use the sun’s energy directly

Euglena

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Heterotrophs

Heterotrophs are organisms that can NOT make their own food

Heterotrophs can NOT directly use the sun’s energy

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Energy

Energy Takes Many Forms such as light, heat, electrical, chemical, mechanical

Energy can be changed from one form to another

Energy can be stored in chemical bonds & then released later

Candles release energy as HEAT & LIGHT

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ATP – Cellular Energy

Adenosine Triphosphate

Contains two, high-energy phosphate bonds

Also contains the nitrogen base adenine & a ribose sugar

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ADP

Adenosine Diphosphate

ATP releases energy, a free phosphate, & ADP when cells take energy from ATP

One phosphate bond has been removed

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Sugar in ADP & ATP

Called ribose

Pentose sugar

Also found on RNA

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Importance of ATP

Principal Compound Used To Store Energy In Living Organisms

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Releasing Energy From ATP

ATP is constantly being used and remade by cells

ATP provides all of the energy for cell activities

The high energy phosphate bonds can be BROKEN to release energy

The process of releasing ATP’s energy & reforming the molecule is called phosphorylation

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Releasing Energy From ATP

Adding A Phosphate Group To ADP stores Energy in ATP

Removing A Phosphate Group From ATP Releases Energy & forms ADP

Loose

Gain

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