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Class Topics

Learn about the processes of photosynthesis and cellular respiration, including glycolysis and aerobic respiration. Understand how these processes produce ATP and release energy from organic compounds. Explore fermentation and the Krebs cycle.

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Class Topics

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  1. Chapter 5 Quiz 2 Review photosynthesis Notes – glycolysis, cellular respiration "Ad astra per aspera." (to the stars through hardship) Anonymous To learn about photosynthesis Title: Biology 11/28/06 Class Topics Objectives: Thursday, October 24, 20194:44 AM

  2. Class Assignments What By When • Chapter 5 Quiz 2 11/28/06 • Read 104-110 11/30/06 • W.S. 5.3 (DR/Quiz) 11/30/06 • Chapter 5 Test 12/6/06 • Due this class period • Due next class period • Due in the future

  3. Grade Sheet 1A – SR p. 61 - 5 pts Measurement W.S. – 10 pts 3A SR p. 42 – 6 pts 4A – SR p. 47 – 5 pts 2A – Measurement W.S. – 10 pts SR p. 80 – 5 pts

  4. Postquiz Activities • Hand in quiz • Read 104-110 • Review questions 1-6 on p. 110 • Review photosynthesis (light reaction) • Correct homework

  5. Energy Needs • Each cell in the human body uses, on average, 1,000,000 ATP molecules per second • 100,000,000,000,000 cells in the human body • Each human uses 1 x 1020 ATP/sec • 100,000,000,000,000,000,000 ATP/sec

  6. Cellular respiration • C6H12O6 + 6O2 6 CO2 + 6H2O + 36 ATP Photosynthesis

  7. Cellular Respiration • Breaking down food products (organic compounds) • Heterotrophs and autotrophs • Anaerobic respiration • No 02 • Aerobic respiration • With 02

  8. Glycolysis • Occurs in all organisms • in cytoplasm - glucose split • Converted to 2 pyruvic acid (pyruvate) • Gain 4 ATP (-2 from the beginning) • Gain 2 NADH from NAD+

  9. Fermentation • Occurs after glycolysis if no O2 is present (anaerobic) • No ATP gained • Alcoholic Fermentation • Bacteria and yeast - used to make beer, wine, bread, yogurt, sour cream • Lactic Acid Fermentation • Animal muscle cells • Minor discomfort (burning sensation)

  10. From: http://www.accessexcellence.org/RC/VL/GG/ana_Pyruvate.html

  11. Aerobic Respiration • Mitochondrion • Release of energy from food in the presence of O2 • After glycolysis - 90% energy left • Krebs cycle - named after Sir Hans Krebs • Pyruvic Acid enters and ATP, NADH, and CO2 exits

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