1 / 16

The Process of Photosynthesis

Learn about the two primary sets of reactions involved in photosynthesis: the light-dependent reactions and the light-independent reactions. Discover how energy from sunlight is used to produce ATP, NADPH, and oxygen, and how ATP and NADPH are used to synthesize high-energy sugars. Explore the factors that affect photosynthesis, such as temperature, light intensity, and water availability.

ahmedn
Télécharger la présentation

The Process of Photosynthesis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Process of Photosynthesis

  2. Learning Objectives • Explain what happens during the light-dependent reactions. • Explain what happens during the light-independent reactions. • Identify the factors that affect photosynthesis.

  3. Two Sets of Reactions Photosynthesis involves two primary sets of reactions: light-dependent reactions and light-independent reactions.

  4. Light-Dependent Reactions Light-dependent reactions use energy from sunlight to produce ATP, NADPH, and oxygen. Thylakoid

  5. Thylakoid Thylakoids contain clusters of chlorophyll and proteins known as photosystems.

  6. Light-Dependent Reactions Use energy from sunlight to produce oxygen Convert ADP and NADP+ into energy carriers ATP and NADPH hydrogen ion movement / ATP formation photosystem I photosystem II electron transport chain

  7. Photosystem II Absorbs light energy and produces high-energy electrons Splits water molecules, releasing H+ ions and oxygen

  8. Electron Transport Chain A series of electron carrier proteins shuttle high-energy electrons during ATP-generating reactions.

  9. Photosystem I Electrons are reenergized Second electron transport chain transfers electrons to NADP+, producing NADPH

  10. Hydrogen Ion Movement/ATP Formation The difference in both charge and H+ ion concentration across the membrane provides the energy to make ATP.

  11. Light-Dependent Reactions Summary The light-dependent reactions produce oxygen gas and convert ADP and NADP+ into the energy carriers ATP and NADPH.

  12. Light-Independent Reactions ATP and NADPH are used to synthesize high-energy sugars.

  13. Carbon Dioxide Enters the Cycle Six carbon dioxide molecules from atmosphere combine with six 5-carbon molecules Produces 12 3-carbon compounds.

  14. Sugar Production Energy from ATP and high-energy electrons from NADPH are used to convert the 3-carbon molecules to higher-energy forms.

  15. Light-Independent Reactions Summary

  16. Factors Affecting Photosynthesis Important factors that affect photosynthesis include temperature, light intensity, and availability of water. Some plants have adapted to extremely bright, hot conditions: C4 plants and CAM plants.

More Related