Virus Structure, Classification, and Cycles of Infection Samuel Quinn, Maxwell DeAngelo, Mason Holmes Virus Structure, Classification, and Cycles of Infection 

Overview 1. Virus and Virus Structures 2. Adenovirus 3. Retrovirus 4. Lytic Cycle 5. Lysogenic Cycle 6. ABC's

What is a Virus? an effective agent that duplicates its self- inside living cells Can infect all life forms Particles are made of proteins and nucleic acids Non- living Max DeAngelo

Virus Structure Capsid : Protein shell of the virus z Virus Structure Capsid : Protein shell of the virus Genetic information Max DeAngelo

Viruses Structures: T4 Bacteriophage z Viruses Structures: T4 Bacteriophage Made of a Tail sheath and Tail fibers Contains DNA in the head Infects Bacteria in order to spread Max DeAngelo

Symptoms of a Bacteriophage Fever Chills Diarrhea vomiting Max DeAngelo

Andenovirus Andenovirus affect mostly young children Click to add text Andenovirus Andenovirus affect mostly young children Targets intestines Targets Urine Tract Targets Eyes Targets Respiratory System Samuel Quinn

Adenovirus An example is sore throat Challenging time talking Painful when swallowing Can affect anyone Drink hot drinks Samuel Quinn

Retrovirus caused by reverse transcriptase z Retrovirus  caused by reverse transcriptase  the opposite of transcription  RNA is transcripted into DNA  Samuel Quinn

Retrovirus An example of an retrovirus is HIV Targets the immune system Can also be called AIDS One of the symtoms is swollen glands Immune sytem defends body Samuel Quinn

Lytic Cycle Step 1: Virus attaches to bacteria and inserts DNA into it Step 2: New viruses are created in the bacteria Step 3: Viruses lyse out of the bacteria (cell dies) Step 4: Process repeats Mason Holmes

Lysogenic Cycle Step 1: Virus injects DNA into bacteria Step 2: Viral DNA joins the bacterial chromosome Step 3: Host cell copies DNA polymerase Step 4: The cell splits Mason Holmes

Difference Between lytic cycle and Lysogenic Cycle Lysogenic cycle involves prophage Lysogenic cycle involves the splitting of the cell Lytic cycle is faster Mason Holmes

Similarities Between Lytic Cycle and Lysogenic Cycle Both cycles have the same outcome Created by virus injecting DNA into bacteria Mason Holmes

What is a T4 Bacteriophage Made Up Of? RNA – Surface proteins – Membrane Envelope DNA in the tail sheath – RNA in Head – Surface proteins DNA in the Head – Tail sheath – Tail fibers TEM’s – Viruses - Capsids Max DeAngelo

What is a Virus? A Memory Bound Organelle Particles are made of proteins and nucleic acids The Flu A living particle Max DeAngelo

Which is not a sympton of HIV? a. Swollen Glands b. Headache c. Trouble Speaking d. Muscle Pain C Samuel Quinn

What does HIV target  a. Immune System b. Brain c. Heart d. Nasal Passage A Samuel Quinn

What is a Similarity Between the Lytic and Lysogenic Cycle Both include prophage Both include the cell splitting Both have the same outcome Both take the same amount of time Mason Holmes

What is the First Step of the Lytic Cycle Viruses reproduce inside the cell  Virus attaches to bacteria and inserts DNA into it Cell splits  Host cell copies DNA polymerase Mason Holmes

Overview 1. Virus and Virus Structures 2. Andenovirus 3. Retrovirus 4. Lytic Cycle 5. Lysogenic Cycle 6. ABC's