viruses that attack bacteria are called quizlet


The virion contains two (+) strand RNA copies of the HIV genome, each carrying its own reverse transcriptase. Explain two reasons why the climate at Earths poles is colder than the climate at the equator. A site on the phage DNA where proteins binds and begin inserting the phage DNA into the phage head. The phenomenon responsible for the ability of Corynebacterium diptherium to produce the virulent toxin responsible for the devastating effects of diptheria is called. Circular clear areas in a lawn of bacteria growing on an agar plate. \text{ } & \text{B. The bacterium ruptures and phages are released. The Sun radiates energy onto all areas of Earths surface. the reason may be that plant cell membranes are covered by thick cell walls impenetrable to virion uptake or genome insertion, Plant virus transmission through plasmodesmata. The nondependent type of mutualism, where organisms gain mutual benefits from there associations, but can survive independently outside of the partnership is called what? -natural selection favors viruses that can build the largest capsid from the smallest amount of genetic information. $$ Which of the following is an example of vertical transmission of a virus in plants? What is the relationship between vertigo and the semicircular canals? An example is a phage genome that is arranged in a head-to-tail manner (i.e. The phage genome is inherited by the daughter cells of the bacterium. Biocalculus: Calculus for the Life Sciences. $$ True or false? The area of the Arctic Ocean covered by sea ice is decreasing at an accelerating rate because open water absorbs more solar energy than ice does. Prions are __________ that are thought to cause disease by __________. Virulent phages replicate through the lytic cycle only, and temperate phages replicate using both the lytic and the lysogenic cycles.

To generate virions, a host RNA polymerase transcribes the viral genome into viral mRNA and viral genomic RNA. Reverse transcriptase has a high error rate, generating slightly different versions of the virus, some of which can evade host defenses and antiviral drugs, which is why HIV treatment requires multiple antiviral agents that target different parts of viral replication. All the genetic information in an organism; all of an organism's chromosomes. B. Further they may only live/reproduce in living cells. The replicative form of nucleic acid in filamentous phages is. -picornovirus(which includes poliovirus) genomes contain (+) strand RNA, allowing the virus to replicate entirely in the cytoplasm, without any DNA intermediates. The host range of a virus depends on the presence of host receptor molecules. How are the salt ducts an adaptation to the iguana's environment? Class IV viruses are characterized by which of the following types of genomes? For example, one phage may have the order ABCDEFG, another may have CDEFGAB, and another may have DEFGABC. In most cases, the incoming phage cannot replicate. Unicellular organisms have one cell. What are the advantages and disadvantages of replication by the host polymerase, compared with using a polymerase encoded by its own genome? Why can flare-ups of herpes virus infection recur throughout a person's life? after phage bacteria has entered host bacteria and linked its DNA with the host DNA it is called. How are retroviruses different from other types of viruses? Rarely, DNA virus can mutate and evolve ability to package its RNA transcript, rather than its DNA, in a capsid. How does a retrovirus like HIV enter a host cell? Bacteriophage particles that contain bacterial chromosomal DNA instead of (generalized transducing phage) or in addition to (specialized transducing phage) phage DNA. Some viruses package enzymes and possess a lipid envelope. AN increase in host population density increases the rate of transmission of viral pathogens. allows replication of the page genome without destroying the host. the tail acts as a "hypodermic needle", injecting the phage DNA into the cell. 1)Genetic resistance: To save a crop it may be interbred with a wild strain that possesses genes conferring resistance, human pathogens come from other humans or from related animals referred to as vectors, a culture in an enclosed vessel of liquid medium. a phage-encoded RNA polymerase is used to make negative-sense RNA using the phage positive-sense RNA as a template. Proteins produced by many different species of bacteria that recognize foreign DNA sequences and cleave the foreign DNA on both strands at a DNA sequence specific for each restriction enzyme. A third limitation is how to keep them alive long enough in the body in order for them to kill the bacteria. Large genomes like herpesvirus and Mimivirus have larger genomes. Instead of being translated from an early gene, the reverse transcriptase protein is actually carried within the virion, bound to the RNA genome with a primer in place. The bidirectional replication of a circular DNA molecule where initiation of replication starts at a single ori. Circular RNA molecules that function like a virus in plants are termed __________. There are three types of restriction enzymes (TypeI, II, and III). It catalyzes the formation of DNA from an RNA template. The lytic cycle of bacteriophage infection ends with the _____. The core envelope encloses the nucleocapsid-coated DNA, as well as a large number of accessory proteins. Prophages of pathogenic bacteria express virulence factors but can express positive factors as well including. b. community. What are the three types of Flu Vaccines. Which replicative cycle describes a virus that can integrate its genome into the host cell's genome? an infectious particle consisting of a little more than genes packed into a protein coat, the protein shell enclosing the viral genome, some viruses have accessory structures that help them infect their hosts, each particular virus can infect cells of only a limited number of host species called the host range, the way the virus enters the cell depends on the type of virus, a phage replicative cycle that culminates in death of the host, these restrict the ability of a phage to replicate within the bacterium as they will identify the page and cut it up with cellular enzymes. Which of the following describes how burning fossil fuels is MOST LIKELY to impact marine organisms? A virus that infects bacteria; also called a phage. Write a brief report to communicate your opinion. The smaller the viral genome, the more genome copies can be synthesized from the host cell's limited supply of nucleotides. In slow-release replication, single-stranded circular DNA of M13 serves as a template to synthesize a double-stranded intermediate. is the only form of RNA found in phages AND acts directly as mRNA. Viruses typically attach to what type of HOST MEMBRANE RECEPTORS? Which of the following organisms does not have its virulence increased by lysogenic conversions? \end{matrix} \text{Term} & \text{Definition}\\ The main purpose of a ___ is to trigger an immunological reaction against a virus or other microbe. The phage reproductive cycle that kills the bacterial host cell is a __________ cycle, and a phage that always reproduces this way is a __________ phage. What is the function of the cellular DNA ligase IV/XRCC4 in Herpesvirus DNA replication? Describe two physical properties you would need to know in order to begin calculations for your model. An oncogene encodes an abnormal form of a host protein that controls cell proliferation. What kind of fitness advantage might favor acquisition of host genes? Culture within animals ensures that the virus strain maintains its original virulence (ability to cause disease). The growth phase of phage whereby the phage DNA is incorporated into the bacterial cell and remains in a stable, silent state. Which direction is the lagging strand read? B. -plant viruses infect cells by mechanisms that do not involve specific membrane receptors. abnormally shaped proteins; inducing similar but normally shaped proteins in the brain to adopt the abnormal form. How should scientists express very large numbers when reporting data? A bacteriophage that incorporates itself into the host genome as a Lysogenic Prophage, When referring to a microbe that cannot reproduce, the term ___ is to BACTERIA, as the term ___ is to VIRUSES, Term used to describe the process in which a virus is ENGULFED by a cell and enclosed in a vacuole or vesicle, Term used to describe the physical rupture of a cell, A non-enveloped virus is also called a(n) ___ virus, Enveloped viruses release newly assembled viruses through __ or __, Naked viruses release newly assembled viruses through ___, Disease-causing agent composed only of protein, Some deadly human pathogens such as diphtheria, cholera, and botulism are made more virulent by bacteriophages known as ___ phages, or Prophages, Cain, Campbell, Minorsky, Reece, Urry, Wasserman, Ann E. Reynolds, Lee Silver, Leland Hartwell, Leroy Hood, Michael Goldberg. Which of the following events occurs during the lytic life cycle of phages? They transcribe RNA to DNA using reverse transcriptase. Are LEDs a better alternative? animal viruses enter cell as intact virions. Charlotte W. Pratt, Donald Voet, Judith G. Voet, Fundamentals of Biochemistry: Life at the Molecular Level, LEDs are considered an even better alternative to CFLs to replace incandescent bulbs. A virus that infects bacteria. apparently this is the phages 'protein coat', temperate phages are phages capable of using both modes of replicating within a bacterias, a virus with not only a capsids but also an outer membrane that is passed from a host cells membrane prior, it can be observed that even the ER is highjacked in this host cell to produce the new parts of the host cells membrane to produce spiked membranes that the new copies of the phages can use exocytosis to take new spiked membrane with them, after the virus is in provirus form it can form now mRNA that leaves the nucleus, a virus that carries along an enzyme called, the most important retrovirus is enveloped and made of two single RNA strand and also two molecules of reverse transcriptase. cutting viral DNA once it has entered the cell. Integrating genes from a host leads to a genome of larger size. \text{ } & \text{G. Amount of energy needed to raise the temperature of 1 gram of water }{ 1^{\circ} \mathrm{C}}\\ \text{ } & \text{C. Stage of cellular respiration that starts with pyruvic acid and produces carbon dioxide}\\ How many valence electrons does each carbon atom have? PROTEIN FIBERS AT THE END OF THE PHAGE TAIL, During penetration of E coli by the T4 phage. -how virus binds to cell-surface receptors, Plaque isolation and Assay of Bacteriophages, -viruses cannot be isolated as "colonies." Klosneuvirus shows evidence of integrating genes from cellular hosts. Compare and contrast mutation and horizontal gene transfer as methods of enabling bacteria to respond to selective pressures and adapt to new environments. Transduction often involves defective virus. An infected plant produces seeds that contain the virus, giving rise to infected progeny. since plants have thick cell walls that prevent lytic burst or budding out of virions, plant virions spread to uninfected cells by traveling through plasmodesmata( a membrane channel in plants that connects adjacent plant cells).The outer part of the channel connects the cell membranes of the two cells; the inner part connects the ER of one cell to that the other. What is the most effective way to stop viral infections? The integration of phage DNA into the bacterial chromosome occurs because of, Once integrated, phage DNA can remain in the prophage state as long as, The activation of the SOS system in a bacterium infected with a prophage results in. Process that forms either lactic acid or ethyl alcohol when no oxygen is present}\\ Be sure to consider environmental, health, and economic factors. Similarly, in animal viral infections such as herpes, an environmental stress triggers reactivation of a virus that was dormant within cells (a latent infection). -Animal viruses can be cultured within whole animals by serial inoculation, where virus is transferred from an infected animal to an uninfected one. Inserting (packaging) DNA into phage heads until the head is completely full of DNA and no more DNA will fit inside.

A phage that can incorporate chromosomal DNA into its phage particle in place of phage DNA. The number of phage produced by one phage infecting one bacterium. A phage that replicates inside the host cell and then lyses its host during its release is a. Excess salt in the body can damage cells and organs. 1.47 10^8 m/s. The cells of unicellular organisms divide to reproduce; those of multicellular organisms divide to replace cells and to grow. \text{ }\\ Virions infect helper T cells and other lymphocytes of the active immune system. Antiviral drugs are designed to block virus replication by: Term that best describes the relationship between viruses and their host cell, All viruses MUST infect a host cell - in order to replicate. Dissolved carbon dioxide in seawater would cause an increase in shellfish populations due to strengthened skeletons. Commercially useful restriction endonucleases (Type II) recognize and cleave the short, specific sequence of DNA. If the sequence of the genes is ABCDE, terminally redundant molecules would have the sequence ABCDEAB. -DNA viruses need mRNA intermediates to express proteins. The growth phase of phage that is designed to produce many offspring as quickly as possible.

The bacterial species that can be infected by a specific phage. This is good in that the phage will be selective and target that particular bacteria. This information is not always known, especially at the beginning of the infection. Jane B. Reece, Lisa A. Urry, Michael L. Cain, Peter V Minorsky, Steven A. Wasserman, Biocalculus: Calculus, Probability, and Statistics for the Life Sciences, Charlotte W. Pratt, Donald Voet, Judith G. Voet. synthesize double-stranded DNA and single-stranded DNA, go through a lytic life cycle AND carry a positive single-strand of DNA.

A. in scientific notation B. to the tenth decimal point C. as a fraction D. in inches. -anelloviruses commonly appear in our blood plasma, without known disease. What are the 3 treatments for acne discussed in lecture. Synthetic media will not support the growth of viruses. The regularity switch of lysogeny responds to environmental cues indicating the likelihood that the host cell will survive and continue to propagate the phage genome. Even on solid medium, viruses never form a solid visible mass comparable to the mass of cells that constitutes a cellular colony, Christy C. Hayhoe, Doug Hayhoe, Jeff Major, Maurice DiGiuseppe. viruses do not carry out metabolic processes, a primary characteristic of living organisms. Fossil fuels are commonly used as an energy source for transportation vehicles. Increased levels of carbon dioxide in seawater would increase the rate of photosynthesis in marine plants. What is the advantage of having a icosahedron as opposed to a another polyhedron such as a cube or tetrahedron? When prions come into close proximity with the normal proteins, they cause them to refold into the prion form. Restriction and modification enzymes were discovered because the EOP of phage grown on different strains of E. coli was altered by up to four logs, depending on the last strain the phage was plated on. -poxviruses (vaccinia), which contain an oval-shaped particle nearly as large as a cell (200-300nm). The ends of the DNA of certain phage genomes that have overlapping sequence homology. The 2009 outbreak is considered a pandemic even though its death toll was much lower than that of 1918-1919 pandemic. Solve tough problems on your own with the help of expert-verified explanations. Viruses can be seen with what microscope? lymphatic immune systems quizlet
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