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Viruses & cells
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Human Immunodeficiency Virus
HIV
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Influenza Virus
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Bacteriophage Virus
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What is so special about VIRUSES?
Viral reproduction requires a living cell. Can’t reproduce on its own! Viruses are considered “NON-LIVING” Some viruses replicate through the LYTIC CYCLE Other viruses replicate through the LYSOGENIC CYCLE (HIV) Don’t metabolize nutrients
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Lysogenic Infection: can stay dormant for a long time before it breaks out of the cell and infects other cells. Viral DNA is within the host DNA and replicates together. Ex. Herpes virus, HIV Lytic Infection: Happens quickly and destroys infected cell. DNA replicates separately from the host DNA. Ex. Flu
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I Need to Remember… Viruses are considered “Non-Living”
Viruses use the cells machinery to help it reproduce Viruses are considered “Non-Living” Viruses replicated by the LYTIC or the LYSOGENIC cycle Viruses and cells both have nucleic acids- Viruses can have DNA or RNA NEVER both! HIV is a virus that infects & destroys immune system cells Antibiotics can’t kill a virus
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A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for a period of time. During this period the virus affects the body by doing which of the following? The virus produces toxins that weaken immune cells and prevent them from reproducing. The virus damages immune cells while using their machinery to produce copies of itself. The virus uses nutrients meant for immune cells to fuel its own cellular respiration The virus changes the identity of the nucleotides of immune cells to prevent the immune system from functioning normally.
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Severe acute respiratory syndrome (SARS) is an illness caused by a coronavirus. Symptoms including high fever, headaches, and body aches typically occur two to seven days after infection by the virus. SARS is more serious in elderly patients. This information suggests that the reproductive cycle of SARS virus is? lysogenic, because the virus is a coronavirus Lytic, because the virus causes respiratory illness Lysogenic, because the virus primarily affects older people Lytic, because of the quick onset of symptoms after infection
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Lytic Cycle Manipulative-
Put these pictures in order from 1-7 in the lytic cycle and match them with the correct definition of what is happening at each step. Then number your paper 1-7 in the correct order from start to finish!
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1. 4. 2. 5. 3. 6. 7.
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What your paper should look like!
4. 5. 6. 1. 2. 3. 7.
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Asexual binary fission Prokaryotic Single Celled
Coccus (Round) Bacillus (Rod Shaped) Spirilla (Spiral) Asexual binary fission Prokaryotic Single Celled No nucleus or membrane bound organelles Sexual exchange DNA by conjugation Nitrogen fixing bacteria Decomposers Bacteria in intestines and in food(cheese, yogurt) Bacteria that cause disease such as Tetanus, Strep Throat Staph Infections Tuberculosis Antibiotic Antibiotic Resistance
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BACTERIA-PROKARYOTES
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Using a light microscope a student identified the following characteristics of four organisms found in a sample of pond water. Based on the observations of the student, which organisms most likely belong to the taxonomic group of bacteria? Organisms 1 and B. Organisms 3 and C. Organisms 1 and D. Organisms 2 and 3
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Some fungi secrete substances that are toxic to bacteria that compete with them for food. Scientists have used their knowledge of this ability of fungi in order to produce which of the following substances? Yogurt Fertilizers Plastic Antibiotics
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Four different types of cells are shown below.
Which characteristic is shared by all four cells? A mechanism for transforming sunlight into energy Self locomotion Membrane bound organelles that transport substances Genetic material composed of DNA
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Cell Membrane DNA Ribosomes Nucleus Fungus Animal/Plant No Organelles
Cytoplasm Bacteria Organelles Protist No nucleus Prokaryotes Eukaryotes BOTH DO as a class
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Label CELLS & VIRUSES
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Enhances the ability to cause disease due to being slippery
Animal Cell Plant Cell Cell Part Function Mitochondria Energy (ATP) production Nucleus Holds genetic material (DNA) Cell Membrane Maintains Homeostasis; Regulates water and ion movement in and out of cell Cytoplasm Substance between cell organelles Cell Part Function Vacuole Storage Chloroplast Sight of photosynthesis to make energy Cell wall Outer structure to provide support Nucleus Holds genetic material (DNA) Bacteria Cell Virus Cell Part Function Flagella Provide movement DNA Genetic Material Capsule Enhances the ability to cause disease due to being slippery Cytoplasm Substance between cell organelles Part Function Capsid Contains DNA for infection DNA Genetic Material Neck Tail Fibers Attachment
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Match the Organelles with their function
Animal/Plant Cell/Both Function Cytoplasm Nucleus Nucleolus Ribosome Cell Membrane Rough Endoplasmic Reticulum Smooth Endoplasmic Reticulum Golgi Apparatus Lysosome Vacuole Mitochondria Centriole Cell Wall Chloroplast
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Organelle Cell Function Cytoplasm Both Nucleus Nucleolus Ribosome
6. Jelly like substance inside cell membrane Nucleus 8.Holds/contains genetic material of the cell Nucleolus 7.Small, dense region where assembly of ribosomes begin Ribosome 12.Makes proteins Cell membrane 10.Semi-Permeable, regulates what enters and leaves the cell Rough E.R 14.Has ribosomes and helps them assemble and deliver proteins Smooth E.R 13.Doesn’t have ribosomes and responsible for detoxification of drugs Golgi Apparatus 11.Modifies, sorts, and packages proteins and other molecules for storage in cell Lysosome 3.Breakdown materials in cell (cleans the cell of junk) Vacuole 9.Sac like structure stores materials- plants have a big one Mitochondria 4.Breaks down food for energy/Produces energy(ATP) Centriole Animal 2.Assist in cell division helps pull chromosomes to opposite sides of cell during mitosis Cell Wall Plant 1.Provides support, protection, and helps maintain shape Chloroplasts 5.Uses energy from sun to produce food for plant (site of photosynthesis)
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Word Bank for Venn Diagrams Only 1 word goes for both
VIRUS CELLS BOTH Word Bank for Venn Diagrams Only 1 word goes for both Tail (bacteriophages) Cell membrane Capsid Mitochondria Vacuoles Fibers Nucleus chloroplasts Protein coat Cytoplasm Endoplasmic Reticulum Living Non living Nucleic Acids (DNA) Cell Wall
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Cells Living Nucleus Virus Vacuoles Non living Cell walls Protein Coat
Cell Membranes Mitochondria Cytoplasm E.R Chloroplasts Virus Non living Protein Coat Tail (bacteriophage) Fibers Capsid BOTH Nucleic Acids (DNA)
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Word Bank Virus Bacteria Cell Plant Cell Animal Cell Chloroplast
Mitochondria Cell Wall Cell Membrane DNA Genetic material Cytoplasm Photosynthesis
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