1 / 13

Cell organization

Cell organization. Viruses. What is a virus? Nonliving Particle Core of hereditary material (DNA) Protein coat Viruses can only reproduce inside a living cell. How are viruses classified ?. Active Viruses: Attach Invade Copy Release Destroys a cell as soon as it enters it.

nuncio
Download Presentation

Cell organization

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Cell organization

  2. Viruses • What is a virus? • Nonliving Particle • Core of hereditary material (DNA) • Protein coat • Viruses can only reproduce inside a living cell

  3. How are viruses classified? • Active Viruses: • Attach • Invade • Copy • Release • Destroys a cell as soon as it enters it

  4. How are viruses classified? (continued) • Latent Viruses: • Attaches, • Becomes part of genetic material, • Divides with cell, • Leaves genetic material and becomes active • Virus can become active and destroy host cell at any time • What is a vaccine? • Preventative made from damaged virus particles that can’t cause disease anymore

  5. Section 3: Microscopes and Cell Theory • Simple Microscope: Magnifying glass • Compound Light Microscope: lets light pass through an object and then through 2 more lenses, magnifying even more • Electron Microscope: use a magnetic field to bend beams of electrons (only dead tissue/cells)

  6. Some important dates: • 1665: Robert Hooke slices a cork and looks at it under a microscope, notices little boxes = cells • 1838: Matthias Schleiden studies plant parts and concludes that all plants are made of cells • 1839: Theodor Schwann says the same thing about animals • 1850’s : Rudolph Virchow hypothesizes that cells can only come from other cells

  7. Cell Theory: • 1. All organisms are made up of one or more cells • 2. Cells are basic unit of structure and function in all organisms • 3. All cells come from cells that already exist

  8. Prokaryotic cells: have no membrane around their nuclear material • Examples: bacteria and cells that form pond scum • Eukaryotic Cells: has a nucleus with a membrane around it • Examples: Animal and plant cells

  9. Animal cells are like a huge factory, all parts working together: • Cell Membrane: outer layer of the cell that allows certain materials in or out (doors/windows) • Cytoplasm: gel-like material filling the cell (air) • Organelles: structures inside the cytoplasm that carry out cell functions

  10. Nucleus: largest Organelle, directs all activity of the cell and contains genetic info for whole cell (office) • Chromatin: hereditary material in nucleus (paperwork) • Endoplasmic Reticulum: folded membrane that moves material around inside the cell (conveyor belt) • Ribosomes: make proteins (factory workers)

  11. Golgi Bodies: package and move proteins out of cell (delivery guys) • Mitochondria: where food molecules are broken down and energy is released (lunch room) • Lysosomes: digest wastes and worn out cell parts (trash men) • Vacuoles: storage areas in cell (closets)

  12. Plant Cells: Very much the same, but there are key differences. • Cell Wall: rigid structure outside the cell membrane that supports and protects the plant cell • Chloroplasts: change light energy into chemical energy (sugar) • Chlorophyll is the chemical that converts energy for plant cells, makes them green

  13. Cell Organization: • Cells • Tissues • Organs • Organ Systems • Organism

More Related