Name:________________________________________________ Period:_________ Date:_______________________

4.4 Virus Reproduction: Lytic and Lysogenic

Annotate and Eliminate: Answer the multiple-choice questions in your DFAD.

1. Would you classify a virus as living or non-living?A. LivingB. Non-living

2. What do virus and bacterium have in common?A. RibosomeB. CapsidC. Nucleic AcidD. Plasma membrane

Label the diagram using the word bank below

Guided Notes

How do viruses infect their host?

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A. CapsidB. Nucleic Acid C. Envelope D. Projections

If the virus below is trying to attach and infect a host cell which, given its surface marker shape which cell is it able to infect?

3.

4.

5.

6.

___________________ are uses to attach to the host cells ____________________.

Only specific viruses can attach to ______________________ receptor site.

Name:________________________________________________ Period:_________ Date:_______________________The diagram below shows two pathways that viruses take when they infect a host cell. Use it to help you answer the questions below

1. In which of the pathways (A or B) do you see other VIRUSES being made?___________________________________________________________________

2. In which of the pathways (A or B) do you see copies of the cell with virus DNA being made?___________________________________________________________________

3. Are the cells in both pathways being attacked by a virus?___________________________________________________________________

4. Are there any sections where both pathways meet?

____________________________________________________________________

Viral Reproduction Time Memory TrickLytic Cycle 1 hour to 1 week SHORT word SHORT cycle

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Virus

Name:________________________________________________ Period:_________ Date:_______________________Lysogenic Cycle 2 weeks to years LONG word LONG cycle

Lytic Cycle

Lytic Cycle - The virus enters the host cell, _________________ (makes virus copies) and bursts out the cell, __________________ the cell. Infection are ______________, viruses replicate right away.

Lysogenic Cycle - The virus enters the host cell, but does ______ _________________. It _________________(joins) its DNA or RNA into the host’s chromosome. The virus can survive this way for __________or even_____________ before entering the _____________ __________, replicating and destroying the cell.

CFU #1: Which cycle is faster and produces copies of viruses right away?

A. Lytic CycleB. Lysogenic Cycle

CFU #2: Which cycle is slower and only copies the viral DNA?

A. Lytic CycleB. Lysogenic Cycle

Intendent practice

1. Which cycle is faster and produces copies of viruses right away?

A) Lytic Cycle B) Lysogenic Cycle

2. Which of these is the best description of a virus? A) a noncellular living organism

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Name:________________________________________________ Period:_________ Date:_______________________B) chemical complexes of RNA or DNA protected by protein C) one of the smallest bacteria known D) a member of the kingdom Virusae

5. Look at the table below to figure out if each virus is lytic or lysogenic. The incubation time tells you how long it takes once a person is exposed to the virus to actually get sick.

Characteristics of Some Viral Diseases

Disease Symptom Incubation Lytic or Lysogenic?

Measles Rash, fever 9-11 days

Shingles Pain, itching on skin Years

Merkel Sweating, achiness, vomiting 2-5 days

Warts Bumpy areas on skin Months

Influenza Body aches, runny nose, fever 1-4 days

HIV Fatigue, weight loss, fever 2-6 years

Canine Parvovirus

weight loss, and lack of appetite 2-7 days

6. Measles is a highly contagious infection caused by the measles virus. Initial signs and symptoms typically include fever, often greater than 40 °C (104.0 °F), cough, runny nose, and inflamed eyes. Two or three days after the start of symptoms, small white spots may form inside the mouth, known as Koplik's spots. Measles usually targets infants and very young children. A red, flat rash which usually starts on the face and then spreads to the rest of the body typically begins three to five days after the start of symptoms. Symptoms usually develop 10–12 days after exposure to an infected person and last 7–10 days. This information suggests that reproduction cycle of this virus is –

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2. Flu Case StudyAt Yes Prep Brays Oaks High School, there was an outbreak of the flu in the month of October 2017. Despite feeling awful, Ashley decided to come to school so she didn’t get behind in Biology class. While this is admirable, it would have been better if Ashley stayed home. Ashley sneezed on Jennifer in class. GROSSThe next morning, Jennifer texted Ashley, “GIRL I FEEL AWFUL. U GOT ME SICK!!!!!! UGH”What kind of virus is the Flu virus (Lytic or Lysogenic)? __________________

How do you know this? _______________________________________________

3. Chickenpox Case StudyAn older man comes in to the hospital, complaining of a painful rash and blisters on one side of his body. The doctor looks through the man’s medical history and discovers the man had chickenpox when he was 7. The doctor knows the man appears to have shingles, which is the form of the chickenpox that adults get. Because the man had chicken pox when he was younger, he is immune to getting the virus again.What kind of virus is the shingles virus (Lytic or Lysogenic)? __________________

Were the chicken pox and the shingles caused by the same virus? ___________________

Name:________________________________________________ Period:_________ Date:_______________________A. Lytic, because it causes a red rashB. Lysogenic, because it causes a feverC. Lysogenic, because it targets infants and young childrenD. Lytic, because of the quick start of symptoms after one has received the virus

7. The diagram below shows one of the 2 viral infection pathways. What is the name of this pathway (Cycle)?

A. Lytic CycleB. Antibiotic pathwayC. Lysogenic CycleD. Viral Vaccine cycle

8. ____ The diagram below represents a process.

Which is BEST represented by this diagram?

A. The lytic cycleB. MotorcycleC. Cellular reproductionD. The lysogenic cycle

9. The diagram below shows one of the 2 viral infection pathways. What is the name of this pathway (Cycle)?

A. Lytic CycleB. Antibiotic pathwayC. Lysogenic CycleD. Viral Vaccine cycle

10. ____ The diagram below represents a process.

Which is BEST represented by this diagram?

A. The lytic cycleB. MotorcycleC. Cellular reproductionD. The lysogenic cycle

Elaborate: The lab technicians at the hospital were able to isolate and study the life cycle of the virus infecting the patient below. Study the diagram of its life cycle below and use this evidence, along with what you have learned about viral life cycles and the flu and chickenpox, to add evidence and a diagnosis to your Patient 2 Chart.

________________________________________________

________________________________________________

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Name:________________________________________________ Period:_________ Date:_______________________________________________________________________

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