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What is the main energy source for life on Earth?

What is the main energy source for life on Earth?. Sunlight!. Energy & Organisms. How do organisms obtain & use energy?. Autotrophs. Capture energy from sunlight or chemicals & use that energy to produce food Plants. Heterotrophs.

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What is the main energy source for life on Earth?

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  1. What is the main energy source for life on Earth? Sunlight!

  2. Energy & Organisms How do organisms obtain & use energy?

  3. Autotrophs • Capture energy from sunlight or chemicals & use that energy to produce food • Plants

  4. Heterotrophs • Organisms that rely on other organisms for their energy & food supply • Animals

  5. How do plants get what they need? • Water is mostly absorbed from the roots. • Sunlight is taken in from the leaves. • Chloroplasts have chlorophyll to absorb light! • Carbon dioxide enters through the stoma (on the leaves)

  6. Stoma • Gas enters & exits through the stoma (on the leaves)! • The stoma opens & closes when the leaf releases water!

  7. How do plants store energy? • Energy captured from the sun can be stored in several ways: • Glucose • ADP • ATP ADP can be converted into ATP by adding a phosphate group! Glucose is a sugar that can be converted into energy.

  8. What type of macromolecule is glucose? • Protein • Lipid • Carbohydrate • Nucleic Acid Carbohydrate! Glucose is a sugar!

  9. Glucose • The most efficient energy storage! • It stores 90x the energy of other storage methods!

  10. ADP • Adenosine Di-Phosphate • A 5-C sugar (ribose) • A base (adenine) • 2 phosphate groups

  11. ATP • Adenosine Tri-Phosphate • A 5-C sugar (ribose) • A base (adenine) • 3 phosphate groups • ATP is short term storage & is the basic energy source for all cells!

  12. ADP is like a battery waiting to be charged! ATP is like a rechargeable battery, because even though it can lose a phosphate group, it can gain another one later!

  13. ATP has 3 parts. Which of the following is not a part of ATP? • Adenine • Enzymes • Phosphate • Ribose Enzymes!

  14. Using the Energy If energy is stored in ATP, how is the energy released? • When a chemical bond between the 2nd & 3rd phosphates of ATP is broken, energy is released!

  15. What molecule is created when ATP loses a phosphate group? • ADP is created as a result!

  16. ATP gets its energy by breaking down- • Food • Enzymes • Cells • Cytoplasm Food! Glucose is a more efficient way to store energy!

  17. When ______ is broken away from the ATP molecule, energy is released. • Adenine • Enzymes • Phosphate • Ribose Phosphate!

  18. How do organisms use energy? • Protein Synthesis • Building proteins • Muscle Contraction • Active Transport • Moving molecules in & out of the cell

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