Photosynthesis

Big Idea #2: Energy is needed to do stuff.

Essential Knowledge

• 2A2: Organisms capture and store free energy for use in biological

processes.

Producers: Phototrophs• Use free energy solar radiation to produce

sugar (PS)• Plants, Algae (Phytoplankton), Bacteria

PS Occurs in Chloroplasts

Found in all green parts

Most abundant in mesophyll cells

Chlorophyll: green pigment that captures free energy sunlight.

Chloroplast Structure•Thylakoids are

membrane-bound discs

•Outside fluid is called the stroma

•Contained in a double membrane

Chloroplast x5,755

• Capture free energy from small inorganic molecules (H2S) to produce sugars

(chemosynthesis)

• Can occur w/out O2.

• Bacteria

Producers: Chemotrophs

Evolution of PS

• Started in prokaryotic cells (bacteria) and created an oxygenated atmosphere.

• rRNA analysis

• Made foundation for eukaryotic PS.

Mr. Anderson PS Video ClipChloroplast Diagram

PS Cloze Activity!

Review of Calvin Cycle

http://www.science.smith.edu/departments/Biology/Bio231/calvin.html

http://www.youtube.com/watch?v=OYSD1jOD1dQ