BIO 181 Lecture 4.7

Lecture 4.7: Photosynthesis


We saw earlier that cells only have no more than 20 of ATP reserve because it’s being oxidized at an enormous rate–100 million ATP per second. We also saw how cells regenerate that ATP using energy extracted from organic molecules. But where did the energy from these organic molecules come from, given that energy can only be transferred, not created? Ladies and gentlemen, you are walking, talking sunlight.


  1. Read Chapter 10 of the textbook.
  2. Download Lecture 4.7 slides.
  3. Do one of the following:
    1. In-person section: Attend Lecture 4.1.
    2. Online section: Watch the following videos:
      1. Video 4.7.1, Nature of Light.
      2. Video 4.7.2, Light-Dependent Reactions.
      3. Video 4.7.3, Light-Independent Reactions.
  4. Complete the questions on Study Guide 4.7.


After completing the activities, log into Canvas, launch BIO 181 and complete Lecture 4.7 Quiz.

This entry was posted in Uncategorized. Bookmark the permalink.