PHOTOSYNTHESIS!!!!! (song goes to the tune of Battle Hymn of the Republic) Good review before the test! J. Brimhall The light reaction starts with little photons from the sunThey strike the thylakoid & split the water- it’s all done! Electrons from the molecules of high, high energy They’re NADPH & molecules of ATP! (Chorus) CO2 & water yields oxygen & glucose CO2 & water yields oxygen & glucose CO2 & water yields oxygen & glucose And that’s called photosynthesis! Verse 2 CO2 goes through the pores, connects with ATP Goes through the Calvin cycle, known as dark reaction to meThis all takes place in stroma deep within the chloroplast, Yielding one molecule of glucose in a remarkable task! (Chorus) Verse 3 The breaking down of glucose is cellular respiration All organisms do this or they are in desperation! The glucose splits into two parts, known as pyruvates Then oxygen determines which pathway they will take! (Chorus) Verse 4 If oxygen is gone them fermentation it must chooseThe end products are lactic acid or some ethanol booze! This pathway is anaerobic, only two ATPsThat’s not a lot of energy for things like you or me! (Chorus) Verse 5 If oxygen is present, then the Krebbs cycle it takesGoes through the steps and 36 molecules of ATP it makes The end products are CO2 & water-there’s no risk- Can you see this is the opposite of photosynthesis!!