I think I can, I think I can… I just need my CO 2, H 2 O and light…

I think I can, I think

I can…

I just need my CO2, H2O and light…

Takes place in the chloroplast of plant cells

Cells in the leaves have the most chloroplasts because they are closest to the sun!

ATPATP (Adenosine triphosphate) Universal energy currency

When we talk about energy being either produced or used we are talking about it in the form of ATP

ATP, your rechargeable battery We “recharge” through eating! Just add P!

P stands for what element??

Pathway that converts light energy into chemical energy Source of light energy usually is: Chemical energy stored as:

Plants then use the sugars (glucose) to produce high energy carbohydrates like starches.

sunGlucose (Sugar)

THE PHOTOSYNTHESIS THE PHOTOSYNTHESIS EQUATIONEQUATION

COCO22 + H + H22O + light O + light C C66HH1212OO66 + + OO22

Carbon dioxide + water + light sugar + oxygen

Carbon dioxide + water + light Carbon dioxide + water + light sugar + oxygensugar + oxygen

No CO2 = no photosynthesis Shortage of water can slow or stop

photosynthesis (Plants in extreme areas have evolved to

protect against this) Intensity of light

(There is an upper limit – plants have a maximum limit)

Carbon dioxide + water + light Carbon dioxide + water + light sugar sugar + oxygen+ oxygen

Temperature The enzymes that assist in

photosynthesis can only work in a certain temperature range. (32˚F – 95˚F)

Anything colder or warmer and you risk damaging the enzymes

At VERY low temperatures, photosynthesis stops entirely

Plants and some types of organisms are able to use light energy from the sun to produce food “auto” = “self” “troph” = “nourishment” Plants! And SOME bacteria!Plants! And SOME bacteria!

Other organisms cannot use the sun’s energy directly- we call them Heterotrophs! “hetero” = “other” ExamplesExamples

AnimalsAnimals Fungi (decomposers)Fungi (decomposers)