Foothill High School Science Department Photosynthesis Background Information Energy & Life

Foothill High School Science Department Autotrophs & Heterotrophs Key Concept Key Concept : Plants and some other types of organisms are able to use light energy from the sun to produce food.

Autotrophs & Heterotrophs Autotrophs Autotrophs –Organisms that make their own food. –They can use the sun’s energy directly. Euglena

Foothill High School Science Department Autotrophs & Heterotrophs Heterotrophs Heterotrophs –Organisms that can NOT make their own food. –They can NOT use the sun’s energy directly.

Foothill High School Science Department Chemical Energy & ATP Energy Takes Many Forms Energy Takes Many Forms – Light – Heat – Electricity – Chemical compounds Candles release chemical energy as light & heat Candles release chemical energy as light & heat

Foothill High School Science Department ATP & ADP ATP Adenosine Triphosphate

Foothill High School Science Department ATP & ADP ADP Adenosine Adenine & Ribose Diphosphate Two Phosphate Groups

Foothill High School Science Department ATP & ADP phosphate removed

Foothill High School Science Department Releasing Energy From ATP Adding A Phosphate Group To ADP Adds Energy Subtracting A Phosphate Group From ATP Releases Energy

Foothill High School Science Department Releasing Energy From ATP Key Concept Key Concept: The Characteristics of ATP Make It An Exceptionally Useful Molecule, And It Is Used By All Cells of All Life Forms As Their Basic Energy Source.

Foothill High School Science Department Using Biochemical Energy Cells Use ATP For: – Active Transport – Movement – Biochemical Reactions

Foothill High School Science Department Molecules of Energy Storage ATP 1.Cells Have Enough ATP To Last For A Few Seconds. 2.ATP Transfers Energy Very Well 3.ATP Is NOT Good At Energy Storage.

Foothill High School Science Department Molecules of Energy Storage One Glucose Molecule Stores More Than 90 Times The Chemical Energy Than One ATP Molecule

Foothill High School Science Department Fats store the most energy. –80 percent of the energy in your body –about 146 ATP from a triglyceride Proteins are least likely to be broken down to make ATP. –amino acids not usually needed for energy –about the same amount of energy as a carbohydrate Molecules of Energy Storage

Foothill High School Science Department A few types of organisms do not need sunlight and photosynthesis as a source of energy. Some organisms live in places that never get sunlight. In chemosynthesis, chemical energy is used to build carbon-based molecules. –similar to photosynthesis –uses chemical energy instead of light energy Chemoautotroph's