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Photosynthesis

Photosynthesis. Light Absorption. Sun gives off visible light Red , Orange , Yellow , Green , Blue , Indigo , Violet Some colors reflected to our eyes Some colors absorbed into the object viewing. Choices : Red Orange Yellow Green Blue Indigo Violet. White light.

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Photosynthesis

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  1. Photosynthesis

  2. Light Absorption • Sun gives off visible light • Red, Orange, Yellow, Green, Blue, Indigo, Violet • Some colors reflected to our eyes • Some colors absorbed into the object viewing

  3. Choices: Red Orange Yellow Green Blue Indigo Violet White light Which color(s) are being reflected? Yellow Which color(s) are being absorbed? Red, Orange, Green, Blue, Indigo, Violet

  4. Choices: Red Orange Yellow Green Blue Indigo Violet White light Which color(s) are being reflected? Blue Which color(s) are being absorbed? Red, Orange, Yellow, Green, Indigo, Violet

  5. Choices: Red Orange Yellow Green Blue Indigo Violet White light Which color(s) are being reflected? None Which color(s) are being absorbed? All (Red, Orange, Yellow, Green, Blue, Indigo, Violet)

  6. Choices: Red Orange Yellow Green Blue Indigo Violet White light Which color(s) are being reflected? All (Red, Orange, Yellow, Green, Blue, Indigo, Violet) Which color(s) are being absorbed? None (all colors are reflecting into our eyes)

  7. Choices: Red Orange Yellow Green Blue Indigo Violet White light Which color(s) are being reflected? Green Which color(s) are being absorbed? Red, Orange, Yellow, Blue, Indigo. Violet

  8. Light Absorption Green reflected • With leaves, green light reflected (so we see green leaves) • Reds and blues most used in photosynthesis Red, Orange, Yellow, Blue, Violet absorbed into the leaf

  9. PhotosynthesisOverview • Defined: Production of sugar & oxygen from CO2, water, & sunlight • Endergonic reaction: Reaction that requires energy • Who: Autotrophs (Plants, algae, some bacteria) • End Result: Sugar & oxygen waste

  10. Stage 1: Light Dependent (Light Reactions) • Where: Thylakoid membranes of chloroplast • What happens? 1) Sunlight converted into ATP energy 2) Water atoms (H2O) broken apart • Hydrogen (H2) kept for later use • Oxygen (O) is released as a waste • How: Sunlight causes electrons of chlorophyll to detach • Free electrons causes ATP to bond • End Result: ATP, H2, Oxygen waste

  11. Stage 2: Light Independent (Dark Reaction) • Where: Stroma (fluid interior) of chloroplast • What happens? ATP (from light reaction) creates sugars • How? • ATP breaks apart CO2 + H2 • Bunch of unstable C’s, O’s, and H’s recombine into C6H12O6 (Glucose) • End result: Glucose created by all autotrophs C O O H H

  12. Connection between photosynthesis & respiration • Plants • Create their own glucose through photosynthesis • That glucose is used during respiration to make ATP for the plant’s cells • Animals • Animals eat plants to obtain their glucose • Plant glucose is used by animal cells to make ATP during the respiration process

  13. Kobe Kuiz Which color(s) is/are absorbed by a typical red apple? Which color(s) is/are reflected by a typical red apple? What is used during the light dependent reactions? What created during the light dependent reactions? What is used during the light independent reactions? What created during the light independent reactions? True or False: Plants are the only photosynthetic organisms.

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