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Plastids

Plastids. By: Amanda Sabol and NOT Veronica Zimmerman. The Chloroplast. Specialized type of plastid Lens-shaped Chlorophyll gives it a green pigment. Static and rigid appearance but actually very mobile

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Plastids

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  1. Plastids By: Amanda Sabol and NOT Veronica Zimmerman

  2. The Chloroplast • Specialized type of plastid • Lens-shaped • Chlorophyll gives it a green pigment • Static and rigid appearance but actually very mobile • Membranes divide space into three compartments: the intermembrane space, the stroma and the thylakoid space TEM of chloroplasts

  3. Structure of the Chloroplast Thylakoids – flattened, interconnected sacs Granna– stacks of thylakoids Stroma – fluid outside thylakoids/contains DNA, ribosomes, enzymes Thylakoid membrane - site of light-dependent photosynthetic reactions

  4. Functions of Chloroplasts • Aid in photosynthesis • Contain chlorophyll and other enzymes/molecules that assist in the photosynthetic production of sugar • Move around the cell along tracks of the cytoskeleton

  5. Leucoplasts • Usually smaller than chloroplasts • Vary in shape • Colorless plastids found in non-photosynthetic plant tissues • Store starch, proteins and lipids • Synthesize fatty acids, amino acids and other compounds TEM of a leucoplast

  6. Amyloplasts • A type of leucoplast • Colorless plastids that synthesize and store starch (amylose) • Particularly found in roots and tubers TEM of an amyloplast

  7. Chromoplasts • Responsible for both pigment synthesis and storage • Contain pigments that give fruits and flowers their orange and yellow hues TEM of a chromoplast

  8. What are thylokoids? Flattened interconnected sacs Stacks of granna Fluid outside of the stroma

  9. What is true about leucoplasts? They are usually larger than chloroplasts They have a consistent shape They are colorless plastids found in non-photosynthetic plant tissues

  10. Which one of these plastids has a green pigment? Chromoplasts Amyloplasts Chloroplasts

  11. What is the thylakoid membrane? It is the site of light-dependent photosynthetic reactions It gives fruits and flowers their orange and yellow hues It stores amylose

  12. Which of these is false about chloroplasts? Membranes divide space into two compartments which are the stromaand the thylakoid space They are lens-shaped They are static and rigid in appearance but actually very mobile

  13. You are correct 1 2 3 4 5

  14. You are wrong 1 2 3 4 5

  15. Works Cited • http://www.sciencephoto.com/media/10718/enlarge • http://micro.magnet.fsu.edu/cells/chloroplasts/images/chloroplastsfigure1.jpg • http://homepage.smc.edu/hodson_kent/Cells/leucoplast.jpg • http://www.sciencephoto.com/media/10664/enlarge • http://botit.botany.wisc.edu/Resources/Botany/Plant%20Cell/Electron%20Micrographs/Plastids/Chromoplast/Chromoplast%20detail.jpg

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