Unit 3: Energy : Respiration/ Photosynthesis


Students will know…

  • All living systems require constant input of energy.
  • Organisms capture, use and store energy in biological processes such as growth, reproduction and maintaining homeostatic processes.
  • Energy capturing processes include photosynthesis, respiration and fermentation.
  • Eukaryotic cells maintain internal membranes that partition the cell into specialized regions.
  • Positive feedback mechanisms amplify responses in biological organisms.
  • Organisms use negative feedback mechanisms to maintain their internal environments and respond to external environmental changes.
  • Organisms respond constantly to changes in their external environment.

Students will be able to…

  • Explain based on empirical data that all organisms require constant energy input to maintain organization, grow and reproduce.
  • Justify a claim that energy is required for living systems to maintain organization, but that multiple strategies exist in different living systems.
  • Predict how changes in energy availability can affect organisms, populations and ecosystems.
  • Use representations of the manner in which organisms utilize energy to pose scientific questions about mechanisms and structural features that allow organisms to capture, store and use energy.
  • Construct explanations of the mechanisms and structural features that allow organisms to capture, store or use free energy.
  • Justify the selection of data relevant to the question of what types of molecules will an animal, plant or bacterium take up as necessary building blocks and excrete as waste products.
  • Graphically represent or quantitatively model relationships that exist when organisms exchange molecules with the environment and build new molecules to maintain organization..
  • Explain how internal membranes and cell organelles contribute to cell functions.
  • Use representations and models to describe how eukaryotic cells use internal membranes that partition the cell into specialized regions.

Lecture Topics / Reading Assignments:

1. Laws of Bioenergetics / ATP p. 142-151
2. Anaerobic Respiration p. 162-169, p. 177-179
3. Kreb’s Cycle/ Control p. 170-177; p. 180-182
4. Pigments / Research p. 185-192
5. Light Reactions p. 192-198
6. Calvin Cycle / Pathways p. 198-205
7. Review Review Book p. 53-57; p. 75-96


  1. Modeling Cell respiration
  2. Lab : Respiration
  3. Modeling Photosynthesis
  4. Lab : Photosynthesis
  5. Chemiosmosis Coloring Activity


The Photosynthetic Dark reactions Do Not Happen in the Dark

Case Study:

Bean Brew


  • Use these worksheets to review factors affecting enzymes.

  • Answer these questions as you watch Mr. Anderson's video.


  • Follow this link to an animation which simplifies the steps of glycolysis.

  • Watch this video on glycolysis to familiarize yourself with the details. Later this week you can watch the other parts of the series.


  • Finally this video does an excellent job of summarizing all of respiration in only 14 minutes. This is a great review!

  • Do you need a good laugh? Follow this link and see if you can relate this video to feedback inhibition!

  • This diagram ties together all the steps of aerobic respiration.

  • Here is the powerpoint with the notes on cell respiration.


  • Watch this video to introduce you to the technique used in the photosynthesis lab.

  • You don't often get to color in AP Biology....but this diagram is worth the time! Have fun.

  • This article tells you all the reasons why the "Dark reaction" is mis-named! Complete attached questions.

  • And Mr. Anderson, once again explaining photosynthesis.

  • Here is a link to a video that explains c4 and CAM photosynthetic pathways.


  • Use the following chart and diagram to compare the different photosynthetic pathways.

  • Complete this worksheet for a good review of Photosynthesis.