Viruses!!! Get out your IAN Notebooks to take notes on.

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Presentation transcript:

Viruses!!! Get out your IAN Notebooks to take notes on

VIDEO

Characteristics of a Virus Not cells Non-living (can’t be treated with antibiotics) Change over time Very small (Animation)(Animation) Cause diseases – pathogen

Viruses DO NOT Grow (can’t get bigger) Metabolize nutrients (eat) Have a nucleus Have organelles Respond to stimuli Reproduce without a host - parasitic

Viruses are made of A protein coat called capsid DNA or RNA – but never both

Viruses also have Antigens – proteins on the capsid to recognize a target cell and bind to the receptor (fits like a key and lock)

Vaccines Inject a weakened virus Helps stimulate immune system to create antibodies against the virus Creates resistance to the virus Antibodies – proteins that attach to antigens keeping the immune system strong

A RETROVirus is A virus with RNA as its genetic material The RNA mutates easily by transcribing RNA backward Each individual virus created can be slightly different from the others (so different hard for immune system to keep up with changes)

DRAW & LABEL the VIRUS below Nucleic Acid Core CAPSID – made of a protein coat Bacteriophage (infects bacteria)

DRAW & LABEL the VIRUS below Nucleic Acid Core (RNA) CAPSID – made of a protein coat Antigen(glycoprotein) HIV (Retrovirus RNA) Membrane Envelope (Made of lipids & glycoproteins)

DRAW & LABEL the VIRUS below Nucleic Acid Core CAPSID – made of a protein coat Antigen(glycoprotein) Influenza (Flu – Retrovirus RNA) Membrane Envelope (Made of lipids & glycoproteins)

Plickers Quiz Stop Here! Mrs. Voight will give this quiz when she returns!

1. Are viruses alive? A.Yes B.No

2. Are viruses abiotic or biotic? A.Abiotic B.Biotic

3. The outer layer of all viruses is made of which macromolecule? A.Carbohydrate B.Lipid C.Nucleic acid D.Protein

4. What is the outer layer of a virus called? A.Bacteriophage B.Capsid C.Influenza D.Adenovirus

5. What type of genetic material is stored in a virus? A.DNA B.RNA C.Both D.Neither E.Either DNA or RNA

6. Which of these is an example of a retrovirus? A.Influenza B.Herpes C.HIV D.AIDS