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Photosynthesis

Discover how plants produce energy through photosynthesis, using sunlight to convert water and carbon dioxide into sugars and oxygen. Learn about autotrophs, chemical equations, light-dependent and light-independent reactions, and the importance of sugars in plant metabolism.

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Photosynthesis

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  1. Photosynthesis

  2. Energy • Plants cannot “eat” their food to obtain energy, so they must “make” their own food by carrying out photosynthesis. • They are called autotrophs.

  3. Photosynthesis • Uses the energy of sunlight to convert water and carbon dioxide into high-energy sugars and oxygen. • Takes place in the chloroplast.

  4. Chemical Equation • Copy at least the first and last. They are the same thing, but the last one is with the formulas. • In addition to water and carbon dioxide, photosynthesis requires light and chlorophyll, a pigment found in chloroplasts.

  5. Light-Dependent Reactions • Requires sunlight. • Absorbs sunlight to produce oxygen gas (O2) and convert ADP and NADP+ into the energy carriers ATP and NADPH. • These provide the energy necessary to make the sugars for “food” in the next step.

  6. Light-Independent Reactions or the Calvin Cycle • Uses ATP and NADPH from the previous reaction to produce high-energy sugars. • Does not require light.

  7. Sugars • Plants use these sugars produced to carry out cellular respiration.

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