1 / 30

Virus and Bacteria: Characteristics, Structure, and Reproduction

Explore the key characteristics, structure, and reproduction methods of viruses and bacteria, including the types of viruses and bacteria, virus structure, bacteria structure, and how bacteria cause disease. Learn about the importance of bacteria in various industries and their role in causing diseases.

kramerg
Download Presentation

Virus and Bacteria: Characteristics, Structure, and Reproduction

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. Warm Up • Which is considered a living organism: bacteria or viruses? • List some viruses that you know. • What is a vaccine? Is there a vaccine for HIV? Why or why not?

  2. Virus & Bacteria Notes Day 1 Objective: Draw a picture of a virus labeling the key parts of a virus. http://www.wheneverymomentcounts.com/pictures/ebola.jpg

  3. Virus Characteristics • SIZE: ½ TO 1/100SIZE OF BACTERIA. • THEY DO NOT metabolize, grow or develop. • * REPRODUCE INSIDE A HOST CELL. • BACTERIOPHAGE: VIRUS THAT INFECTS A bacterium. • * TYPES OF VIRUSES: RABIES, POLIO, HIV, AND COMMON COLD

  4. virus structure Genetic material Draw

  5. Bacteriophage structure is a little more complicated.

  6. EBOLA

  7. HIV

  8. Virus Reproduction 1) VIRUS INSERTS GENETIC MATERIAL INTO HOST CELL. 2) DESTROYS HOST CELL’S DNA. 3) USES VIRUS GENETIC MATERIAL TO CREATE NEW VIRUS PARTS. 4) NEW VIRUS PARTS COME TOGETHER TO FORM VIRUSES. 5) VIRUSES BREAK APART THE CELL AND LEAVE.

  9. Bacteria Structure • #1 Bacteria are prokaryotes, meaning they lack a nucleus. • #2 Cell size: 1 micrometer in diameter. Eukaryotes are 10 times the size of prokaryotes. • #3 Not truly multicellular.

  10. Bacteria Structure #4 Chromosomes: singular circular piece of DNA and plasmid DNA. #5 Reproduction: Binary Fission, what is that? #6 Flagella: for movement

  11. Binary Fission

  12. Objective: 1) Identify the different forms of bacteria as well as their prefixes. 2) Describe how pili, capsule, and endospore can be considered adaptations. http://www.beautyofbedford.com/images/acne_zit_3.jpg

  13. Three Basic Bacteria Shapes 1. Bacillus: Rod-shaped 2. Coccus: Round-shaped 3. Spirillum: Spiral-shaped

  14. Bacteria Organization (prefixes) • Strepto-: bacteria forms chains • Staphylo-: bacteria forms clusters

  15. Bacteria Structures #1 Capsule: some bacteria have this gel-like layer outside the cell wall. #2 Endospore: forms when the bacteria is under stress. Thick wall surrounds the chromosomes. When conditions are favorable, the endospore will “hatch”, releasing an active bacteria.

  16. #3 Pili: extensions of the bacteria cytoplasm

  17. Pili allow bacteria to stick to other surfaces, including other bacteria. • Bacteria can also exchange genetic information through their pili. This is called conjugation.

  18. Objectives: 1) Identify characteristics of autotrophic and heterotrophic bacteria. 2) Describe ways in which bacteria causes disease. 3) Determine benefits to bacteria. http://www.leighday.co.uk/upload/public/docImages/8/e-coli%20page.jpg

  19. Types of Bacteria Anaerobic Bacteria: Grow in oxygen free environments Aerobic Bacteria: Grow in the presence of oxygen.

  20. Types of Bacteria • Photosynthetic Bacteria • Green Sulfur Bacteria: anaerobic, uses sulfur compounds instead of water as a source of electrons for photosynthesis. • 2) Purple Nonsulfur Bacteria: anaerobic, uses organic compounds as a source of electrons for photosynthesis. • 3) Cyanobacteria: largely responsible for the earth’s atmosphere. Water is the source of electrons for photosynthesis.

  21. Cyanobacteria

  22. 4) Chemoautotrophic Bacteria: • Remove electrons from hydrogen rich molecules. • Some forms can create nitrate, which is fertilizer for the plants. • 5) Heterotrophic Bacteria: • Most bacteria. • Breaks down the bodies of dead organisms to obtain nutrients. • Can be harmful or helpful

  23. How bacteria cause disease • Some heterotrophic bacteria can secrete enzymes that break down cells and absorb them. • Importance of Bacteria • 1) The making of fermented foods. • 2) The making of industrial chemicals. • 3) The making of drugs through genetically • engineered bacteria.

More Related