Virus life cycle in a cell worksheet pdf

Lesson for the new edexcel gcse 91 separate science curriculum in the b5 health and diseases unit. The life cycle of bacteriophages has been a good model for understanding how viruses affect the cells they infect, since similar processes have been observed for eukaryotic viruses, which can cause immediate death of the cell or establish a latent or chronic infection. The life of a eukaryotic cell can be divided into 4 distinct phases, ending with cell division. The cell cycle, or celldivision cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells. The virus binds to the surface of the host cell and intersects its dna into the cell. Virus structure forms of viruses virus structure types. Introduction to biology prefixes, suffixes, root words, biology branches, life functions, characteristics of life. Enveloped viruses exit a cell by budding, taking the host cell membrane with them. The viral dna instructs the cell to make new viral parts. This quiz and worksheet combo assess your knowledge of the life cycle of a virus. Describe different components and characteristics of viruses and their role in infection.

The potential of a new flu pandemic is a frightening idea. Structure, function, and uses molecular cell biology. Once inside a 22 host cell, they use the enzyme host cell, they use the enzyme reverse reverse. The virus must be able to attach to its host and enter the correct or target cell.

Virus life cycle practice test questions science prof online. It also includes two videos illustrating the virus cell in greater detail. Choose one of the following websites and have students complete companion worksheet in pairs. A virus is a short piece of dna or rna, sometimes with some associated enzymes. Lesson hiv structurelife cycle 2 and implications for.

In your own words, explain why viruses are not living organisms. Bacteriophage injecting dna into bacterial cell, graham colm. Unit 7 worksheet 9 the virus answer key pdf may not make exciting reading but unit 7 worksheet 9 the virus answer key is packed with valuable instructions information and warnings. The macromolecules on the plasma membrane that are essential for the virus to initiate the infectious cycle are designated as virus. The initial event in the viral life cycle is the interaction of one or more viral surface proteins with specific components present on the cell surface. Compans, georg herrler, in mucosal immunology third edition, 2005. The attachment event is electrostatic and does not require any cellular energy.

Which letter above represents the stage at which a host cell begins producing new bacteriaphages. Some viruses can live in an open place for a short time, in some cases, only a few hours. Then, the virus bursts out of the vacuole and releases its nucleic acid into the cell. Remember, a virus can exist outside of its host or inside its host. Worksheet with diagrams of a bacteriophage virus invading a cell, for students to provide descriptions for each stage. This worksheet complements the animation series photosynthesis. Virus life cycles worksheet diagram doc virus, bacteria and immune system flashcards doc viruses and bacteria critical thinking worksheet doc viruses and bacteria worksheet doc characteristics of bacteria worksheet doc active vs passive immnunity worksheet doc allergy article worksheet doc antibody and cellular immunity. The viral genes direct replication, causing the cell to make many new copies of viral genes. Diagrams of possible fungi life cycles are printed on the worksheet for biology pupils to. Which letter indicates the stage at which the bacteriaphage injects its dna into. Objective 12 one group of animal viruses are the retrovirusesretroviruses retroviruses are enveloped viruses that have an rna genome. Educator materials demonstration viral lysis and budding viral.

When the cell receives key signals or information feedback regulation, the cell can begin the next phase of the cell cycle. An average sheet of paper is approximately 150 micrometers thick. The life cycle begins with the penetration of the virus into the host cell. D the virus is replicating within the bacterial cell. Life cycle of a parasite parasites may be endoparasites live the host or ectoparasites live on the outside of the host. It also has students explore where influenza viruses come from, how viruses change, and why some become deadly.

These cycles are the lysogenic life cycle and the lytic life cycle. Students will investigate the outbreak as they learn about viruses, genetic material dna and rna, and the cell cycle mitosis. The shapes of bacteria worksheet doc virus life cycles worksheet diagram doc virus, bacteria and immune system flashcards doc viruses and bacteria critical thinking worksheet doc viruses and bacteria worksheet doc characteristics of bacteria worksheet doc active vs passive immnunity worksheet doc allergy article worksheet. Cell reports resource a temporal proteomic map of epsteinbarr virus lytic replication in b cells ina ersing,1,2,8 luis nobre,3,8 liang wei wang,1,7 lior soday,3 yijie ma,1 joao a. Penetration the virus is engulfed by the cell cell can enter lysogenic or lytic cycle 3.

B the virus is injecting its genetic material into the bacterial cell. Next, the virus is uncoated within the cytoplasm of the cell when the capsid is removed. Attachment specific proteins on cell surface attach to the virus see animation. D both transcription and replication of genetic material. The parts are then assembled, creating an army of viruses. Generally, the virus continues lytic cycle with a few numbers of infected cells, but major portion enters into lysogenic relationship and continues the lysogenic cycle. Genetic recombination occurs between the viral dna and the bacterial genome as the viral dna is inserted into the bacterial chromosome. The lytic and lysogenic cycles are the two ways by which viruses replicate themselves inside a host. These signals allow the cell to complete the previous phase before moving forward. In the lysogenic cycle, bacteriophages reproduce without killing the host.

This virus cell life cyclestructure presentation is suitable for 9th 12th grade. Review students answers to questions 1 to 6 in their worksheet. The steps in the lytic replication cycle of a nonenveloped virus are illustrated for e. A virus is not able to replicate on its own or use raw materials on which to survive. Youll need to know the names of the stages and what events happen during each stage. Virus exists as nucleic acid genetic material image. Biosynthesis viral components are made protein coat, capsid, dnarna 4. Infectious diseases cloze worksheet biology is fun. Life cycle of animal viruses the basic life cycle stages of animal viruses differ from bacteriophages in some key ways. In the small rural community of grand poulet, people are getting sick.

Vaccines for the prevention of life threatening viral infections are one of the most significant advances in human health. A virus is an infectious nonliving particle that cannot survive on its own. Depending on the type of nucleic acid, cellular components are used to replicate the viral genome and synthesize viral proteins for assembly of new virions. Describes the life cycle where virus genome doesnt integrate into host. Lytic cycle once inside the host cell, a virus s genes are expressed and the substances that are produced take over the host.

Viral interference with the cell cycle can have a myriad of different effects to improve virus infection, for example to promote replication of viral dna genomes, or to delay the cell cycle to. Two comic strip activities to show virus life cycles. Which letter indicates the host cell being lysed destroyed. Calculate the size of a virus relative to a human cell.

All questions are based on material that can be found on the virus life cycle lecture main page. The presence of a virusspecific receptor is necessary but not sufficient for viruses to infect cells and complete the replicative cycle. Depending on the type of nucleic acid, cellular components are used to replicate the viral genome and synthesize viral. Viruses use a host cell to make new viruses, then destroy the cell. This step is a critical step in the viral replication cycle. The resource is licensed under a creative commons attributionnoncommercial.

Thus, a virus cannot function or reproduce outside a cell, thereby being totally dependent on a host cell in order to survive. A virus will remain dormant until it is able to infect the next host, activate and replicate. A problembased cell cycle and virus unit pbl for hs biologythe case. A the virus s genetic material has combined with the bacterias genetic material. These events include the duplication of its dna dna replication and some of its organelles, and subsequently the partitioning of its cytoplasm and other components into two daughter cells in a process called cell division. What happens to the host cell when a virus replicates inside it. Some dna viruses can also enter the host cell through receptormediated endocytosis. Can show nova animation to the class and then have students complete worksheet for second animation in pairs. Most viruses are species specific, and related viruses typically only infect a narrow range of plants. Virus cell life cyclestructure presentation for 9th.

The cell can also receive signals that delay passage to the next phase of the cell cycle. The presentation covers the structure of a virus cell and the life cycle of a virus. The reproductive cycle of an enveloped rna virus 2 capsid and viralgenome enter cel 3 the viralgenome red functions as a template for synthesis of complementary rna strands pink by a viral enzyme. In the lytic life cycle, the virus breaks open or lyses the host cell. How would a vaccine or treatment interrupt the life cycle. This virus then inserts its viral nucleic acid into the cell, which forces it to. Plasmodium the protozoan that causes malaria, echinococcus the tapeworm which causes hydatids require more than. Viruses are only able to replicate themselves by commandeering the reproductive apparatus of cells and making them reproduce the viruss genetic structure instead. Viral life cycle simple english wikipedia, the free.