STUDY GUIDE FOR CELLULAR RESPIRATION Cellular Respiration: Transfer of energy from organic compounds (especially GLUCOSE) to ATP. AEROBIC: cellular respiration WITH O2 ANEROBIC: cellular respiration WITHOUT O2 TWO STAGES OF CELLULAR RESPIRATION: STAGE 1: Glucose is converted to Pyruvate producing small amounts of ATP and NADH. STAGE 2: If O2, then: PYR and NADH make lots of ATP; if no O2, then Lactate or Ethanol and CO2 are produced. SEE FIGURE 10 FROM PAGE 104 IIN THE TEXTBOOK.