PLANTS USE SUNLIGHT ENERGY TO MAKE THEIR OWN FOOD You Tube Plants and Sunlight
Where does your energy come from? Autotrophs Plants use sunlight to make their own food Heterotrophs Obtain energy from foods they consume (plants and animals)
Energy in Chemical Bonds EXOTHERMIC: When a bond is broken, energy is released. ENDOTHERMIC: It takes energy in to hold bonds together.
Endothermic or Exothermic? Endothermic Video (digital Thermometer)Endothermic Video Barium Hydroxide Octahydrate with Ammonium Thiocyanate (teacher)Barium Hydroxide Octahydrate with Ammonium Thiocyanate Exothermic Video (Fe2O3 + sugar)Exothermic Video Sodium and Water in Trash Can Exothermic Thermite Myth Busters Thermite Exothermic Make an Instant Cold Pack from Sodium Acetate (Nurd Rage) Supernova Make Glow Sticks - The ScienceSupernova Make Glow Sticks - The Science
Cell’s Batteries ATP Adenosine Tri Phosphate VIDEO: howstuffworks (ATP)howstuffworks (ATP)
ETC (Electron Transport Chain) Accepts high energy electrons and moves them to low energy electrons The energy lost is given to an electron carrier ( NADP+) Virtual Cell: PhotosynthesisVirtual Cell: Photosynthesis
e- flow to NADP+ to form NADPH NADPH is an electron carrier Nicotinamide Adenine Dinucleotide Phosphate.
2. Water is Split Oxygen is released H+ ions build up in thylakoid interior Light reactions (click on the four steps)Light reactions PS II Kid Like Animation PSI
3. H+ ions pumped through the thylakoid membrane H+ ions in chemiosmosis
4. Chemiosmosis Build-up of H+ ions pumped through the ATP synthase to make ATP (P joins ADP)
Summary of Energy transformation in the light reactions Light energy starts the process Flow of Electrons –Splitting of water molecules provides electrons –Release of oxygen molecules from water –Accumulation of H+ in thylakoid spaces –LDR VideoLDR Video
Reduction of NADP to NADPH by adding electrons and H+ Production of ATP using the H+ in thylakoid spaces –ATP synthase enzyme –Powered by flow of H+ from the thylakoid spaces –ADP + Phosphate (Pi) ---> ATP –McGraw-Hill ETC and ATP SynthesisMcGraw-Hill ETC and ATP Synthesis
PSI and PSII Animation You Tube PS II Photosynthesis AnimationVCAC: CellularYou Tube PS IIPhotosynthesis AnimationVCAC: Cellular
LIR (Light Independent Reaction) aka Calvin Cycle Found: in the stroma of the chloroplast Does not need sunlight but is run by ATP and NADPH made in the LDR Here is where the carbohydrates are actually assembled McGraw-Hill Calvin Cycle
Summary of the Calvin Cycle Addition (fixing) of gaseous CO 2 to RUBP, a 5 carbon compound in the stroma of chloroplasts. Energy input from ATP (ATP from the light reactions ---> ADP + Phosphate back to the light reactions) Addition of H+ and energy from NADPH
Summary (cont.) (NADPH from the light reactions ---> NADP+ back to the light reactions Production of carbohydrates for storage, transport, and biosynthesis Recycling of 5 carbon compound (RUBP) to fix more CO 2
Rubisco Most abundant protein in the world! Recyclable! Used in the first step of fixing (making useable) atmospheric CO 2 Attqaches 5-c sugar to CO 2 Ribulose-1,5-bisphosphate carboxylase oxygenase,
Light Independent Reaction YouTube - The Calvin Cycle or (animated and narrated)YouTube - The Calvin Cycle or YouTube - Calvin Cycle Video (simple overview-animated diagram)YouTube - Calvin Cycle Video YouTube - Photosynthesis-Calvin Cycle and Cyclic Electron Flow (your fav science singer)YouTube - Photosynthesis-Calvin Cycle and Cyclic Electron Flow
Now Sing Along YouTube - Photosynthesis - The Light Reactions YouTube - MY FAVE SONG: THE PHOTOSYNTHESIS SONGYouTube - MY FAVE SONG: THE PHOTOSYNTHESIS SONG YouTube - Photosynthesis Song (with subtitles) EXTRA CREDIT- 5 points You write the lyrics to a common song about photosynthesis. Must have at least 5 stanzas.
OR Make a model of either the LDR or LIR or chloroplast Each must include at least 5 labeled items