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Understanding Photosynthesis and Respiration in Biology

Explore photosynthesis and cellular respiration, their reactants and products, and their importance in energy production for cells. Learn about the location and equations of these processes, as well as the concept of fermentation. Engage in a hands-on activity to understand the energy currency of cells and take a quiz to test your knowledge on photosynthesis and respiration.

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Understanding Photosynthesis and Respiration in Biology

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  1. Course: Biology AHSGE Objective #3 Photosynthesis and Respiration

  2. AHSGE Objective #3 • Identify reactants and products associated with photosynthesis and cellular respiration and the purpose of these two processes.

  3. List of Key Concepts: • #3-1. Greek / Latin Word Parts • #3-2. Photosynthesis • #3-3. Cellular Respiration • #3-4. Fermentation

  4. #3-1. Greek / Latin Word Parts • auto- • chloro- • hetero- • photo- • -phyll • troph-

  5. #3-1. Greek / Latin Word Parts • auto- self • chloro- green • hetero- other, different • photo- light • -phyll leaf • troph- feeding

  6. #3-2. Photosynthesis • process in which light energy is converted to chemical energy • carried out by autotrophs • location: chloroplasts • equation: carbon dioxide + water + sunlight  oxygen + glucose Make sure know the difference between reactants and products!

  7. #3-3. Cellular Respiration (AKA: Aerobic Respiration) • process used to release energy in food to make ATP / burning glucose to release energy • carried out by heterotrophs and autotrophs • location: mitochondria • equation: oxygen + glucose  carbon dioxide + water + energy (ATP) Make sure know the difference between reactants and products!

  8. #3-4. Fermentation • AKA: anaerobic respiration • respiration in the absence of oxygen / burning glucose when oxygen is NOT present • may produce lactic acid or alcohol • The process of fermentation is used while making friendship bread 

  9. Activity: Energy Currency of a Cell • People use currency/money to function in today’s society in order to purchase basic needs…In a similar fashion, a cell needs ENERGY in order to function and survive. • The energy required for cell processes is produced in the mitochondria of the cell during the process of respiration! • During this activity you will substitute common parts found on a typical dollar bill (our form of currency) with characteristics of respiration and energy/ATP production.

  10. Activity: Energy Currency of a Cell

  11. Quiz AL COS #3 (Photosynthesis and Respiration) • Define the word “reactants” in your words. • Define the word “product” in your own words. • Identify the location within the cell that photosynthesis occurs. • Record the equation for photosynthesis. • Identify the location within the cell that respiration occurs. • Record the equation for respiration. • Identify the 2 types of respiration. • List as many differences between the 2 types of respiration that you can think of.

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