Viruses.

Slides:

Advertisements

Similar presentations

B ACTERIA & V IRUSES W HAT ARE THE C HARACTERISTICS OF O RGANISMS ? 1. All living things are composed of cells 2. All living things perform certain chemical.

Advertisements

B ACTERIA & V IRUSES Review of Past Knowledge W HAT ARE THE C HARACTERISTICS OF O RGANISMS ? 1. All living things are composed of cells 2. All living.

Viruses Are they alive?. The properties of life ● You already know that living things: 1. Made of cells 2. Grow and reproduce 3. Use information from.

KEY CONCEPT Infections can be caused in several ways.

Viruses Non-living - does not grow, eat, release waste, or breathe. Is able to reproduce, but only when inside a host (the cell that a virus enters) 100.

B ACTERIA & V IRUSES C HARACTERISTICS OF O RGANISMS 1. All living things are composed of cells 2. All living things perform certain chemical processes.

Viruses. Tobacco mosaic virus stunts the growth of tobacco plants and gives their leaves a mottled, mosaic coloration. Studied as early as 1883 by Adolf.

Lesson 3 Viruses. Virus Tiny “organism” that is parasitic to cells Composed of two main parts: Protein outer shell called capsid Genetic material inside.

Viruses. Non-cellular particles of nucleic acid, protein, and in some cases lipids that can reproduce only by infecting living cells Differ widely in.

Viruses Living or Not Virus Virus – small particle made of 1.Nucleic acids either DNA or RNA 2.Surrounded by a protein coat.

What do you think this is?. Viruses What do you Think These Objects are? Are They Living?

VIRUSES Nature’s Robots

Viruses “They Are Not Alive!”.

Lesson 7-3 What are Viruses?

Viruses A virus is a NON-Living particle made of DNA or RNA and a protein coat. Look at table 25-1 on p. 487 in text book. VERY small. ~ 0.001micron.

Chapter Viruses Part 1 – Virus Structure and Function.

PATHOGENS. HOW DO PATHOGENS CAUSE DISEASE? EVIL SPIRITSSWAMP AIR IMBALANCE OF BODY FLUIDS.

What is a virus?  small infectious agent that can replicate only inside the cells of other organisms. Viruses are too small to be seen directly with.

Viruses pp. 104 to 107.

Viruses. At the boundary of life, between the macromolecules (which are not alive) and the prokaryotic cells (which are), lie the viruses and bacteriophages.

Viruses Versus Living Organisms

Viruses Ebola Influenza Rabies HIV West Nile Virus.

VIRUSES A. Viruses are particles containing: 1. Nucleic acid 2. Protein coat B. They can reproduce only by infecting living cells! cells! I. Structure.

Viruses. What are viruses? They are not living things. Viruses are considered non-living because they do not use energy to grow or to respond to their.

B ACTERIA & V IRUSES R OOT W ORDS MicroSmallMicroorganisms MacrolargeMacroorganisms OlogyStudy ofMicrobiology StrepChainStreptococci StaphBuildingStaphylococci.

VIRUSES. SIZE of VIRUSES  Viruses are so small they must be measured in “nanometers”  1,000 nanometers = 1 micrometer  1,000 micrometers = 1 millimeter.

VIRUSES ARE THEY ALIVE OR NOT??? STRUCTURE OF A BACTERIOPHAGE (A VIRUS THAT INFECTS BACTERIA) HEAD PROTEIN COAT GENETIC MATERIAL TAIL NECK BODY TAIL.

VIRUSES. Viruses are particles containing: 1. Nucleic acid 2. Protein coat They can reproduce only by infecting living cells.

Viruses. Learning Goals 1)Understand the structure of a virus 2)Provide support evidence to answer the question, “Are viruses living?” 3)Explain the two.

Bacteria & Viruses.

Viruses…. Are they alive?

Viruses 5/26/2018.

VIRUSES B 4.C Compare the structures of viruses to cells, describe viral reproduction, and describe the role of diseases such as human immunodeficiency.

Bacteria & Viruses 2016 Turner College & Career High School.

Chapter 18 Studying Viruses and Prokaryotes

Characteristics of Viruses

Viruses Doesn’t belong to any kingdom -It’s not a plant or an animal.

Viruses Essential Questions: What is the structure of a virus and how do viruses cause infection?

Tuesday 4/26/16 Learning Target: Know the characteristics, reproduction and how to control viruses. Learning Outcome: Create a virus of your choice which.

Viruses Viruses – particle made up of nucleic acid (DNA or RNA), protein, and in some cases lipids that can replicate only by infecting living cells Core.

Viruses & Bacteria 1.

Please bring a binder/folder and tabs for NEXT CLASS!!!

Virus Notes Chapter 19 Section 19-2.

Viruses Doesn’t belong to any kingdom -It’s not a plant or an animal.

Viruses: the itty bitty stalkers of doom!

Ch. 2.3 Viruses.

Virus Notes Chapter 19 Section 19-2.

Bacteria & Viruses.

What are viruses? A virus is considered a ____________- an organism that lives off of and harms another organism. The cell in which a virus lives is called.

VIRUSES Characteristics NOT considered living things

Did you wash your hands today?

Bacteria & Viruses.

Bacteria & Viruses.

Bacteria & Viruses.

Presentation transcript:

Viruses

What are viruses? Need a host to reproduce Not composed of cells Do not respond to stimuli Do not use energy for growth and development Need electron microscope to see Genetic Material - DNA or RNA

What are some examples of diseases caused by viruses? Rabies Influenza West Nile Virus Viral Meningitis Polio Common Cold Zika HPV (cancer) AIDS/HIV Chicken Pox Small Pox Yellow Fever * Ebola SARS Norwalk

Measles Rabies Hepatitis H1N1: Swine Flu West Nile Virus H5N1: Avian Flu

Bacteriophages--Viruses that attack bacteria 0.5 m

Viral Structure Capsid - the protein coat that surrounds the virus Inside the capsid is either a strand of DNA or RNA Many viruses are surrounded by an envelope (outside of the capsid) which helps them enter cells The envelope is made up of glycoproteins (proteins attached to a carbohydrate molecule)

How do viruses cause Disease Viruses release a toxin while reproducing in a hosts cell. Viral infections generally behave in two ways: Viruses reproduce and cause disease immediately (active or lytic) (colds, flu). Viruses integrate into the host cell (dormant or latent) (Herpes, HIV, Shingles).

How are Viruses Treated Viruses CANNOT be treated with antibiotics the way bacteria can Vaccines use a weakened or dead version of the virus to force the body to make antibodies. These antibodies can then kill invading viruses before they can make you sick. ROTA Common cause of diarrhea in small children

How viruses are treated Vaccines against viruses enhance the immune response of the host Scientists are investigating methods that use viruses for treatment of diseases such as cancer and Alzheimer's disease. The virus’ DNA or RNA are “killed” and replaced with healthy human DNA…gene replacement therapy