Prokaryotic cells
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Prokaryotic Cells. Believed to be the first cells to evolve. Lack a membrane bound nucleus and organelles. Genetic material is naked in the cytoplasm Ribosomes are only organelle. Http.micro.magnet.fsu.edu/cells.html. Cell Wall.

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Prokaryotic Cells

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Prokaryotic cells

Prokaryotic Cells

  • Believed to be the first cells to evolve.

  • Lack a membrane bound nucleus and organelles.

  • Genetic material is naked in the cytoplasm

  • Ribosomes are only organelle.

  • Http.micro.magnet.fsu.edu/cells.html


Cell wall

Cell Wall

  • Rigid peptidoglycan - polysaccharide coat that gives the cell shape and surround the cytoplasmic mem-brane. Offers protection from environment.

  • Http://micro.magnet.fsu.edu/cells/bacteriacell.html


Plasma membrane

Plasma Membrane

  • Layer of phospho-lipids and proteins that separates cytoplasm from external environment.

  • Regulates flow of material in and out of cell.

  • Http://micro.magnet.fsu.edu/cells/bacteriacell.html


Cytoplasm

Cytoplasm

  • Also known as proto-plasm is location of growth, metabolism, and replication. Is a gel-like matrix of water, enzymes, nutrients, wastes, and gases and contains cell structures.

  • Http://micro.magnet.fsu.edu/cells/bacteriacell.html


Ribosomes

Ribosomes

  • Translate the genetic code into proteins.

  • Free-standing and dis-tributed throughout the cytoplasm.

  • Http://micro.magnet.fsu.edu/cells/bacteriacell.html


Nucleoid

Nucleoid

  • Region of the cytoplasm where chromosomal DNA is located. Usually a singular, circular chromosome. Smaller circles of DNA called plasmids are also located in cytoplasm.

  • Http://micro.magnet.fsu.edu/cells/bacteriacell.html


Mesosome

Mesosome

  • Infolding of cell membrane.

  • Possible role in cell division.

  • Increases surface area.

  • Photosynthetic pigments or respira-tory chains here.

  • Http://www.med.sc.edu:85/fox/protobact.jpg


Eukaryotic cells

Eukaryotic Cells

  • “True nucleus”; contained in a mem-brane bound structure.

  • Membrane bound organelles.

  • Thought to have evolved from prokaryotic cells.

  • Http:micro.magnet.fsu.edu/cells/animalcell.html


Ribosomes1

Ribosomes

  • Translate the genetic code into proteins.

  • Found attached to the Rough endoplasmic reticulum or free in the cytoplasm.

  • 60% RNA and 40% protein.

  • Http://micro.magnet.fsu.edu/cells/animals/ribosomes.html


Ribosome

Ribosome

Http://cellbio.utmb.edu/cellbio/ribosome.htm


Rough endoplasmic reticulum

Rough Endoplasmic Reticulum

  • Network of continuous sacs, studded with ribosomes.

  • Manufactures, pro-cesses, and transports proteins for export from cell.

  • Continuous with nuclear envelope.

  • Http://micro.magnet.fsu.edu/cels/animal/endoplasmicreticulum.html


Endoplasmic reticulum

Endoplasmic Reticulum

Http://cellbio.utmb.edu/cellbio/ribosome.htm


Smooth endoplasmic reticulum

Smooth Endoplasmic Reticulum

  • Similar in appearance to rough ER, but without the ribosomes.

  • Involved in the production of lipids, carbohydrate metabolism, and detoxification of drugs and poisons.

  • Metabolizes calcium.

  • Http://micro.magnet.fsu.edu/cells/animals/endoplasmicreticulum.html


Lysosome

Lysosome

  • Single membrane bound structure.

  • Contains digestive enzymes that break down cellular waste and debris and nutrients for use by the cell.

  • Http://micro.magnet.fsu.edu/cells/animals/lysosome/html


Lysosome1

Lysosome

Http://anatomy.med.unsw.edu.au/teach/phph1004/1998/WWWlect3/sld005.htm


Golgi apparatus

Golgi Apparatus

  • Modifies proteins and lipids made by the ER and prepares them for export from the cell.

  • Encloses digestive enyzymes into membranes to form lysosomes.

  • Http://micro.magnet.fsu.edu/cells/animals/golgiapparatus.html


Golgi apparatus1

Golgi Apparatus

Http://cellbio.utmb.edu/cellbio/golgi.htm


Mitochondrion

Mitochondrion

  • Membrane bound organelles that are the site of cellular respiration (ATP production)

  • http://micro.magnet.fsu.edu/cells/animals/mitochondrion/html


Mitochondrion1

Mitochondrion

Http://anatomy.med.unsw.edu.au/teach/phph1004/1998/WWWlect3/sld005.htm


Nucleus

Nucleus

  • Double membrane-bound control center of cell.

  • Separates the genetic material from the rest of the cell.

  • Http://micro.magnet.fsu.edu/cells/animals/nucleus/html


Nucleus1

Nucleus

Http://cellbio.utmb.edu/cellbio/nucleus.htm


Parts of the nucleus

Parts of the nucleus:

  • Chromatin - genetic material of cell in its non-dividing state.

  • Nucleolus - dark-staining structure in the nucleus that plays a role in making ribosomes

  • Nuclear envelope - double membrane structure that separates nucleus from cytoplasm.


Plasma membrane1

Plasma Membrane

  • Phospholipid bi-layer that separates the cell from its environment.

  • Selectively permeable to allow substances to pass into and out of the cell.

  • Http:micro.magnet.fsu.edu/cells/animal/plasmamembrane.html


Cilia and flagella

Cilia and Flagella

  • External appendages from the cell membrane that aid in locomotion of the cell.

  • Cilia also help to move substance past the membrane.

  • Http://micro.magnet.fsu.edu/cells/animals/ciliaandflagella.html


Centrioles

Centrioles

  • Found only in animal cells.

  • Self-replicating

  • Made of bundles of microtubules.

  • Help in organizing cell division.

  • Http://micro.magnet.fsu.edu/cells/animals/animas/centrioles.html


Microfilaments

Microfilaments

  • Solid rods of globular proteins.

  • Important component of cytoskeleton which offers support to cell structure.

  • Http://micro.magnet.fsu.edu/cells/animals/microfilaments.html


Cell wall1

Cell Wall

  • Protects and gives rigidity to plant cells

  • Formed from fibrils of cellulose molecules in a “matrix” of polysaccharides and glycoproteins.

  • Http://micro.magnet.fsu.edu/cells/plants/cellwall.html


Chloroplast

Chloroplast

  • Site of photosynthesis

  • Membrane bound structure.

  • Contains chlorophyll

  • http://micro.magnet.fsu.edu/cells/plants/chloroplast.html


Chloroplast1

Chloroplast

Www.ultranet.com/~jkimball/BiologyPages/C/Chloroplasts.html


Vacuole

Vacuole

  • Plants have large central vacuoles that store water and nutrients needed by the cell.

  • Help support the shape of the cell.

  • Http://micro.magnet.fsu.edu/cells/plants/vacuole.html


Animal vacuole

Animal Vacuole

Www.puc.edu/Faculty/Bryan_Ness/vacuole_TEM.htm


Plant cell vacuole

Plant Cell Vacuole

Www.bio.mtu.edu/campbell/plant.htm


Animal cell vs plant cell

Animal Cell vs. Plant Cell

Http://:micro.magnet.fsu.edu/cells/html


Prokaryotic vs eukaryotic

Prokaryotic vs. Eukaryotic

Http://micro.magnet.fsu.edu/cells.html


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