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Understanding Photosynthesis: The Process of Energy Conversion in Autotrophs

This chapter explores the essential relationship between energy and life, focusing on photosynthesis as the primary method by which autotrophs convert sunlight into chemical energy. We delve into the role of adenosine triphosphate (ATP), the molecule that stores and releases energy, functioning in cycles with adenosine diphosphate (ADP). The chapter highlights the difference between heterotrophs and autotrophs and emphasizes the significance of photosynthesis—transforming light energy into carbohydrates, providing nourishment and energy for the ecosystem.

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Understanding Photosynthesis: The Process of Energy Conversion in Autotrophs

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Presentation Transcript

  1. Chapter 8 - Photosynthesis 8.1 Energy and Life 8.2 Photosynthesis: An Overview

  2. 8.1 Energy and Life • Energy – the ability to do work • Adenosine Triphosphate – ATP • Molecule that stores and releases energy • Consists of adenine, ribose (sugar), and 3 phosphate groups

  3. ADP • Adenosine Diphosphate • Has 2 phosphates instead of 3 • Cycles with ATP to store and release energy • Adenosine + Ribose + Phosphate + Phosphate

  4. Releasing Energy • In order to release energy: • The bonds in ATP between the 2nd and 3rd phosphate groups break = energy is released • ATP has now been changed into ADP and a separate phosphate

  5. Heterotrophs • Organisms that obtain energy by consuming other organisms

  6. Autotrophs • Organisms that obtain energy by making their own food

  7. Photosynthesis • Autotrophs make their own food by photosynthesis • Converting energy of sunlight into chemical energy stored in the bonds of carbohydrates • Photo- “light” • -synthesis “to put together, to make” • Next section = how photosynthesis works!

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