Cells ppt (ch 7) for moodle

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Cells ppt (ch 7) for moodle

  1. 1. Nucleus<br />Contains DNA<br />the instructions for making proteins <br />A nuclear membrane surrounds the nucleus<br />composed of two membranes<br />Pores allow materials to move in/out of the nucleus<br />
  2. 2. Nucleus<br />DNA is in the form of chromatin<br />Individual chromosomes are not visible in this form<br />During mitosis, chromatin condenses into visible chromosomes<br />Nucleolus<br />Site of ribosomes assembly<br />Made of RNA and protein<br />
  3. 3. Ribosomes and ER<br />Ribosomes – make proteins<br />Found floating in cytoplasm or attached to ER<br />Endoplasmic reticulum – transports materials throughout the cell <br />Site of lipid assembly<br />Rough ER – ribosomes on the outside of the ER<br />Smooth ER – No ribosomes on the surface of the ER<br />
  4. 4. Golgi Apparatus<br />Golgi apparatus – sorts, modifies, and packages proteins and other materials<br />Receives materials from the ER <br />Some materials are shipped out of the cell<br />“UPS guys” of the cell<br />
  5. 5. Chloroplasts<br />Found in plants, algae, <br /> Site of photosynthesis<br />Convert light energy into chemical energy <br /> Contains chlorophyll<br />
  6. 6. Mitochondria<br />The mitochiondria is the powerhouse of the cell <br />Converts chemical energy from food into a more useful form<br />Contains its own DNA <br />
  7. 7. Lysosomes <br />Lysosomes breakdown materials into small molecules that are reused by the cell<br />Uses digestive enzymes<br />
  8. 8. Vacuole<br />Vacuoles store materials such as water, salts, proteins, and carbohydrates<br />Much larger in plant cells than animal cells<br />
  9. 9. Cytoskeleton<br />Cell membrane<br />Cytoskeleton provides support, gives shape, and is involved in movement<br />Microfilaments are threadlike structures<br />Structure and movement<br />Microtubules are hollow structures <br />maintains cell shape<br />centrioles are involved in mitosis<br />cell projections (cilia & flagella)<br />ER<br />microtubule<br />microfilament<br />mitochondria<br />ribosomes<br />
  10. 10. Cell Wall<br />Cell walls are found in plants, algae, fungi, and bacteria<br />Provide protection and support <br />Plant cell walls are made of cellulose<br />

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