3. Student Learning Map

  • Topic:06- Cellular Energetics
  • Subject(s):Science
  • Days:14
  • Grade(s):9
Key Learning:

Energy from the sun enters living systems when autotrophs absorb sunlight and use it to make organic compounds. All cells breakdown organic compounds into simpler molecules, a process that releases energy to power cellular activities.
Unit Essential Question(s):
 
 

What is the relationship between photosynthesis and cellular respiration?
   
Concept:

Photosynthesis

SC.912.L.18.7   SC.912.L.18.10  

Discuss how the sun provides energy for most living things. Review the role of chloroplasts in a cell. Discuss the pigment chlorophyll (chemical which absorbs light energy and converts it to chemical energy).

Emphasize the function of photosynthesis.

Identify the products and reactants of photosynthesis. Be sure to describe the specific components of light-dependent and dark reactions.

Discuss the production of ATP in light reactions.

Discuss the factors that affect photosynthesis such as lack of carbon dioxide, lack of light or low temperatures.
Concept:

Cellular Respiration

SC.912.L.18.6   SC.912.L.18.8   SC.912.L.18.10  

Emphasize the function of cellular respiration.

  • Respiration is the process by which cells obtain energy in the form of adenosine tri-phosphate or ATP.
  • ATP transfers chemical energy from the energy rich substances in the cell to the cell's energy requiring reactions. When ATP breaks down, the energy created is used by the cell for processes such as active transport, DNA replication and muscle contraction.

    • Identify the products and reactants of anaerobic and aerobic respiration and differentiate each in relation to oxygen.

    Discuss the specific events that occur during each stage of cellular respiration.

  • Aerobic respiration (Glycolysis --> Krebs Cycle and Electron Transport) occurs in the mitochondria.
  • Anaerobic respiration (Glycolysis --> Fermentation (lactic acid or alcoholic) occurs in the cytoplasm.

    • Discuss the production of ATP in each type of cellular respiration.

  • Anaerobic respiration produces only 2 ATP compared to the 38 molecules of ATP produced during aerobic respiration.

    • HOTS: Comparing/Contrasting, Constructing Support or Error Analysis could be used to demonstrate the ET LEQ.
    Concept:

    Photosyntheis versus Cellular Respiration

    SC.912.L.18.9  

    Discuss how photosynthesis and cellular respiration are interrelated.

  • The products of photosynthesis are reactants in cellular respiration.
  • The products of cellular respiration are reactants in photosynthesis.
  • Cellular respiration is not the reverse of photosynthesis.
  • Photosynthesis and cellular respiration occur at different sites in the cell, have different biochemical pathways, photosynthesis occurs only during daytime in plants and the rate of photosynthesis during daylight hours exceeds the rate of aerobic cellular respiration.
  • Both photosynthesis and cellular respiration make use of an electron transport system to produce ATP and make use of a hydrogen carrier.

    • Be sure to emphasize the following:

  • Autotrophs- photosynthesis and cellular respiration occur
  • Heterotrophs- only cellular respiration occurs

    • HOTS: Comparing/Contrasting, Constructing Support or Error Analysis could be used to demonstrate the ET LEQ.
    Lesson Essential Question(s):

    How do photosynthetic autotrophs produce carbohydrates and oxygen?

    (A)
    Lesson Essential Question(s):

    What are the essential stages of aerobic and anaerobic cellular respiration?

    (A)

    What similarities and differences exist between aerobic and anaerobic respiration?

    (ET)
    Lesson Essential Question(s):

    What similarities and difference exist between photosynthesis and cellular respiration?

    (A)

    How do photosynthesis and cellular respiration work together to provide energy for living organisms?

    (ET)
    Vocabulary:

    *photosynthesis, , light reactions, calvin cycle (dark reactions), adenosine triphosphate (ATP)

    Vocabulary:

    aerobic respiration, anaerobic respiration, glycolysis

    Vocabulary:

    Additional Information:

    The asterisk (*) next to the vocabulary tems above indicates essential FCAT vocabulary.

    Refer to Holt Modern Biology textbook- chapters 6 and 7 (pages 112-149) and ancillary materials.

    GIZMOS: "Cell Energy Cycle", "Photosynthesis Lab", "Interdependence of Plants and Animals" or "Plants and Snails"

    View As PDF

    Acquisition Lesson:

    Extending Thinking Lesson:

    Vocabulary Report

    • *photosynthesis -

      The process by which plants, algae, and some bacteria use sunlight, carbon dioxide and water to produce carbohydrates and oxygen.

    • aerobic respiration -

      The process in which pyruvic acid is broken down and NADH is used to make a large amount of ATP; the part of respiration that is carried out in the presence of oxygen.

    • anaerobic respiration -

      In plant and animal cells, a process in which energy is released from food molecules such as glucose without requiring oxygen.

    • light reactions -

      The initial reactions in photosynthesis, which are triggered by the absorption of light, include the passage of electrons along the electron transport chain, include the production of NADPH and oxygen gas, and the synthesis of ATP.

    • glycolysis -

      The anaerobic breakdown of glucose to pyruvic acid, which makes a small amount of energy available to cells in the form of ATP.

    • calvin cycle (dark reactions) -

      A biochemical pathway of photosynthesis in which carbon dioxide is converted into glucose using ATP.

    • adenosine triphosphate (ATP) -

      An organic molecule that acts as the main energy source for cell processes; composed of a nitrogenous base, a sugar, and three phosphate groups.