structural unit of all organisms.” But what makes cells extremely important to living organisms‚ and why do we need cells anyway? Cells are made of many organelles‚ these include the Nucleus‚ DNA‚ Ribosomes‚ Lysosomes‚ Mitochondrion‚ Vacuoles‚ Cytoplasm‚ Endoplasmic‚ Golgi‚ and the Cell Membrane. There is one specific job of each organelle in a cell. The Nucleus is basically the control
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Prokaryotic and Eukaryotic Cells Have Different Structures 3.5 Some Antibiotics Target Bacterial Cell Walls 3.6 Some Antibiotics Inhibit Prokaryotic Ribosomes 3.7 Molecules Move across the Cell Membrane 3.8 Eukaryotic Cells Have Organelles UP CLOSE Eukaryotic Organelles 39 3620001C03.indd 39 1/27/11 10:14 AM Chapter 3 Cell Function and Structure Wonder Drug How a chance discovery in a London laboratory revolutionized medicine O n a September morning in 1928‚ biologist Alexander
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prokaryote cells both have ribosome and have similar basic metabolism but the cells also have differences when it comes to their size and function. The eukaryotes have a nucleus and the prokaryote cells do not. The Eukaryote cells have membrane-bound organelles which allow them to exhibit much higher levels of intracellular division of labor and the prokaryotes do not. The Eukaryotic cells are about ten times the size of prokaryotic cells and the DNA of eukaryotes is much more complex and therefore much
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substance where all of the other organelles are suspended and held together by a fatty membrane. The cytoplasm is found inside the cell membrane‚ surrounding the nuclear envelope and the cytoplasmic organelles. Under a microscope‚ cytoplasm appears as a three-dimensional lattice of thin protein-rich strands. In other words‚ cytoplasm is like a fence that is made up of lattes that are connected together. This fence’s main purpose is to hold together the organelles within the cytoplasm. Cytoplasm
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proteins. What are Eukaryotic Cells and Eukaryotic Organisms? A eukaryotic cell is a cell that contains complex organelles like nuclei or mitochondria enclosed within a membrane and eukaryotic organisms are organisms that are made up of eukaryotic cells like us‚ humans. What are Prokaryotic Cells and Prokaryotic Organisms? Prokaryotic cells are cells that lack nuclei and other organelles within the cell membrane; they have strands of DNA and RNA in them instead of nuclei. However‚ prokaryotic cells
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Cytoplasm Cell Membrane Nucelous Nuclear Envelope Nuclear Pore Lysosomes Microtubles Microtubules- Is a component of the cytoskeleton. Centriole- Aids in cell division and it’s only in animal cells. Lysosomes- Clean-up organelle it digests and breaks down lipids‚ carbs‚ and proteins. Nuclear Pore- Dots on the envelope which allows material in the and out of the nucleus. Cell Membrane- It surrounds the cell and regulates what enters and leaves the cell. It is selectively
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In other words‚ what is this cell doing that requires that its nucleus be so large? (Please be specific). In eukaryotic cell in slide #3 has organelles including a nucleus containing DNA and mitochondria energy organelles .Compared to the prokaryotic cell which has the DNA in the cytoplasm smaller and simpler and doesn’t contain a nucleus or other organelles‚ it does have cell membrane. Bacteria and Archea are single celled prokaryotes. Slide #3 shows a white blood cell which produce variation of
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7-2 Notes Eukaryotic Cells 1. Eukaryote cells are divided into two parts Nucleus Cytoplasm Portion outside the nucleus where organelles reside Nucleus 2. Contains most of the cell’s DNA 3. DNA is the code for making proteins 4. Surrounded by a double membrane called the nuclear envelope 5. Contains chromatic‚ which consists of DNA bound to protein Condenses during cell division to form chromosomes 6. Nucleolus – small dense region in nucleus where the assembly of ribosomes begins Ribosomes 7. Small
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Experiment 1 1. For each structure identified‚ do you think its location affects its ability to function? Why or why not? (Hint: those buried deep in the cell probably do different things than those closer to the cell membrane). Structure does not affect function of the cells‚ cells have a particular structure that enables them to carry out their function in the best way. 2. Draw a labeled diagram of a small section of the plasma membrane and briefly describe its structure and function
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the pathway to regulate metabolism. Centriole: a structure in an animal cell composed of microtubule triplets arranged in a 9+0 pattern. An animal usually has a pair of centrioles within each of its centrosomes. Chloroplasts: photosynthesizing organelles of all photosynthetic eukaryotes. Competitive inhibition: resembles the enzyme’s normal substrate and competes with the substrate for the active site on the enzyme. Countercurrent exchange: the transfer of a substance from a fluid or volume
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