Virus/Bacteria Quiz
... 9. Why are viruses not considered living organisms? a. Viruses can only be seen with an electron microscope. b. Viruses cannot make their own nutrients. c. Viruses do not contain genetic material. d. Viruses are not made up of cells. 10. Which of these is characteristic of both viruses and bacteria? ...
... 9. Why are viruses not considered living organisms? a. Viruses can only be seen with an electron microscope. b. Viruses cannot make their own nutrients. c. Viruses do not contain genetic material. d. Viruses are not made up of cells. 10. Which of these is characteristic of both viruses and bacteria? ...
General Biology 101
... - Monkey pox (a pox type disease that has passed from monkeys to humans. Has the potential to become a pandemic). Bacteria have developed drug resistant forms that leave the host quite vulnerable. An example is Streptococcus pneumoniae which causes pneumonia, meningitis and chronic inner ear infec ...
... - Monkey pox (a pox type disease that has passed from monkeys to humans. Has the potential to become a pandemic). Bacteria have developed drug resistant forms that leave the host quite vulnerable. An example is Streptococcus pneumoniae which causes pneumonia, meningitis and chronic inner ear infec ...
Master/PhD position in cell biology of virus infection at the University
... skin or mucosa, to reach its receptors and initiate infection. We aim to characterize physical barriers, signaling pathways and receptors that are involved in the viral entry process. The establishment of a protocol for ex vivo infection of epidermal sheets allows us to study virus entry into the ep ...
... skin or mucosa, to reach its receptors and initiate infection. We aim to characterize physical barriers, signaling pathways and receptors that are involved in the viral entry process. The establishment of a protocol for ex vivo infection of epidermal sheets allows us to study virus entry into the ep ...
Enter Topic Title in each section above
... A. Non-cellular; One nucleic acid; Polio; ‘Flu; Common cold; Leaf Obligate parasite; No metabolism; mosaic; AIDS or HIV; Mumps; Do not possess organelles Rubella; Rabies Q. What is meant by the term Q. Give a role of memory T-cells. immunity? A. The ability of the body to resist infection ...
... A. Non-cellular; One nucleic acid; Polio; ‘Flu; Common cold; Leaf Obligate parasite; No metabolism; mosaic; AIDS or HIV; Mumps; Do not possess organelles Rubella; Rabies Q. What is meant by the term Q. Give a role of memory T-cells. immunity? A. The ability of the body to resist infection ...
A. invades the host cell to reproduce B. - Problem
... the e ectiveness of three di erent mouthwashes in destroying bacteria. He covered the surface of the nutrient agar in four petri dishes with bacteria found in the human mouth. One paper disk, 1 centimeter in diameter, that had been soaked in a speci c mouthwash was placed on the agar surface of plat ...
... the e ectiveness of three di erent mouthwashes in destroying bacteria. He covered the surface of the nutrient agar in four petri dishes with bacteria found in the human mouth. One paper disk, 1 centimeter in diameter, that had been soaked in a speci c mouthwash was placed on the agar surface of plat ...
VIRUS Notes
... particles unlike any other organism. A virus consists of genetic material such as RNA or DNA wrapped in a protein coat. ...
... particles unlike any other organism. A virus consists of genetic material such as RNA or DNA wrapped in a protein coat. ...
Microorganisms Review Sheet
... (Reference Textbook Pages: 77; 330-333; Chapters: 15-18) Viruses 1. What are the three types of viruses? Be able to diagram and label. 2. What does a virus have to have in order to live and reproduce? 3. What are some diseases caused by viruses? 4. How do viruses reproduce? Diagram and label both th ...
... (Reference Textbook Pages: 77; 330-333; Chapters: 15-18) Viruses 1. What are the three types of viruses? Be able to diagram and label. 2. What does a virus have to have in order to live and reproduce? 3. What are some diseases caused by viruses? 4. How do viruses reproduce? Diagram and label both th ...
Old Exam#3
... 13. Oparin, in the former Soviet Union, and Miller and Urey, in England, performed some of the first experiments to prove: a. organic macromolecules can arise from abiotic conditions b. micelle formation generated the first membranes c. RNA was the catalytic molecule of early Earth d. TCA cycle gen ...
... 13. Oparin, in the former Soviet Union, and Miller and Urey, in England, performed some of the first experiments to prove: a. organic macromolecules can arise from abiotic conditions b. micelle formation generated the first membranes c. RNA was the catalytic molecule of early Earth d. TCA cycle gen ...
Virus (Latin: slimy toxin, venom) English viruses plural but actually
... 3. early transcription 30 sec to 7 min, host polymerase and sigma 70, products: unusual T7 specific tRNA, mRNAs for proteins synthesis, DNA polymerase, RNA polymerase, ribosylation complex, sigma 70 modifying protein, T4 gp55 sigma factor, Ndd exonuclease destroys host cell DNA infection irreversibl ...
... 3. early transcription 30 sec to 7 min, host polymerase and sigma 70, products: unusual T7 specific tRNA, mRNAs for proteins synthesis, DNA polymerase, RNA polymerase, ribosylation complex, sigma 70 modifying protein, T4 gp55 sigma factor, Ndd exonuclease destroys host cell DNA infection irreversibl ...
Slide 1
... Virus replication: Solution - Virus infects a host cell in order to replicate -no metabolism outside the host cell -requires host nucleotides, amino acids, enzymes, energy - Viral genome directs host cell to make viral proteins - Copies of genome + proteins assembled into new viruses ...
... Virus replication: Solution - Virus infects a host cell in order to replicate -no metabolism outside the host cell -requires host nucleotides, amino acids, enzymes, energy - Viral genome directs host cell to make viral proteins - Copies of genome + proteins assembled into new viruses ...
Lytic and Lysogenic Pathways • Once inside its host cell, a virus can
... • Inside the host, the viral DNA/RNA replicates itself • Using resources from the cell, new full-fledged viruses form o The formation of the first full virus ends the eclipse period • Ultimately, the bacterium will become over-packed with bacteriophages o At this point, the cell will either: • Break ...
... • Inside the host, the viral DNA/RNA replicates itself • Using resources from the cell, new full-fledged viruses form o The formation of the first full virus ends the eclipse period • Ultimately, the bacterium will become over-packed with bacteriophages o At this point, the cell will either: • Break ...
Part I
... 4. Retroviruses: Unique family of enveloped viruses. Have the ability to convert their RNA genetic material into DNA through an enzyme called reverse transcriptase. Viral DNA is integrated into host chromosome (provirus) where it can remain dormant for a long time. Include HIV-1 and HIV-2 which caus ...
... 4. Retroviruses: Unique family of enveloped viruses. Have the ability to convert their RNA genetic material into DNA through an enzyme called reverse transcriptase. Viral DNA is integrated into host chromosome (provirus) where it can remain dormant for a long time. Include HIV-1 and HIV-2 which caus ...
Hello Mighty Achievers
... How Viruses Multiply After a virus attaches to a host cell, it enters the cell. Once inside a cell, a virus’s genetic material takes over many of the cell’s functions. It instructs the cell to produce the virus’s proteins and genetic material. These proteins and genetic material then assemble into ...
... How Viruses Multiply After a virus attaches to a host cell, it enters the cell. Once inside a cell, a virus’s genetic material takes over many of the cell’s functions. It instructs the cell to produce the virus’s proteins and genetic material. These proteins and genetic material then assemble into ...
Chapter 25
... • Encode reverse transcriptase enzyme which makes a DNA copy of their RNA genome • Human Immunodeficiency Virus (HIV) the cause of Acquired Immunodeficiency Syndrome (AIDS) • HIV-1 & HIV-2 • T-cell lymphotropic viruses I & II leukemia ...
... • Encode reverse transcriptase enzyme which makes a DNA copy of their RNA genome • Human Immunodeficiency Virus (HIV) the cause of Acquired Immunodeficiency Syndrome (AIDS) • HIV-1 & HIV-2 • T-cell lymphotropic viruses I & II leukemia ...
Agents of Disease
... • Viruses “go with the flow,” usually causing systemic infections causing systemic infections • Survive in infected plant material, vectors and on surfaces vectors, and on surfaces • Transmitted by insect – fungi – ...
... • Viruses “go with the flow,” usually causing systemic infections causing systemic infections • Survive in infected plant material, vectors and on surfaces vectors, and on surfaces • Transmitted by insect – fungi – ...
Microbiology 2 - Viral disease
... Aids is a retrovirus, of subgroup lentivirus: ssRNA +ve, diploid. It is more complex than other retroviruses as it has extra regulatory genes. Transmission: sexual, intravenous drug abuse, mother to baby, contaminated blood products The virus binds cells expressing CD4(T-helper cells) and a ...
... Aids is a retrovirus, of subgroup lentivirus: ssRNA +ve, diploid. It is more complex than other retroviruses as it has extra regulatory genes. Transmission: sexual, intravenous drug abuse, mother to baby, contaminated blood products The virus binds cells expressing CD4(T-helper cells) and a ...
Replication of Viruses
... virus particle becomes infectious; nucleic acids and capsids are assembled together. ...
... virus particle becomes infectious; nucleic acids and capsids are assembled together. ...
NOTES: CH 19
... ● Each virus has a host range, a limited number of host cells that it can infect ● Viruses use host enzymes, ribosomes, and small host molecules to synthesize progeny viruses ...
... ● Each virus has a host range, a limited number of host cells that it can infect ● Viruses use host enzymes, ribosomes, and small host molecules to synthesize progeny viruses ...
Viral Structure
... Nucleocapsid: genome + capsid Envelope: viruses can be enveloped or not Virion: a complete virus particle with its DNA or RNA core and protein coat as it exists outside the cell; also called a viral particle Translation Parasites: must use cellular ribosomes in a host in order to replicate ...
... Nucleocapsid: genome + capsid Envelope: viruses can be enveloped or not Virion: a complete virus particle with its DNA or RNA core and protein coat as it exists outside the cell; also called a viral particle Translation Parasites: must use cellular ribosomes in a host in order to replicate ...
Microbiology, 9e (Tortora) Chapter 13 Microbiology, 9e (Tortora
... Microbiology, 9e (Tortora) Chapter 13 15) Which of the following statements is not true? A) A prophage is phage DNA inserted into a bacterial chromosome. B) A prophage can pop out of the chromosome. C) Prophage genes are represented by a repressor protein coded for by the prophage. D) A prophage ma ...
... Microbiology, 9e (Tortora) Chapter 13 15) Which of the following statements is not true? A) A prophage is phage DNA inserted into a bacterial chromosome. B) A prophage can pop out of the chromosome. C) Prophage genes are represented by a repressor protein coded for by the prophage. D) A prophage ma ...
Tobacco mosaic virus is viruses that cause disease in
... Kelompok IV ( (+) ssRNA ) Tobamovirus Tobacco mosaic virus Vulgare ...
... Kelompok IV ( (+) ssRNA ) Tobamovirus Tobacco mosaic virus Vulgare ...
Introduction to viruses
A virus is a biological agent that reproduces inside the cells of living hosts. When infected by a virus, a host cell is forced to produce many thousands of identical copies of the original virus, at an extraordinary rate. Unlike most living things, viruses do not have cells that divide; new viruses are assembled in the infected host cell. But unlike still simpler infectious agents, viruses contain genes, which gives them the ability to mutate and evolve. Over 5,000 species of viruses have been discovered.The origins of viruses are unclear: some may have evolved from plasmids—pieces of DNA that can move between cells—while others may have evolved from bacteria. A virus consists of two or three parts: genes, made from either DNA or RNA, long molecules that carry genetic information; a protein coat that protects the genes; and in some viruses, an envelope of fat that surrounds and protects them when they are not contained within a host cell. Viruses vary in shape from the simple helical and icosahedral to more complex structures. Viruses range in size from 20 to 300 nanometres; it would take 30,000 to 750,000 of them, side by side, to stretch to 1 centimetre (0.39 in).Viruses spread in many ways. Just as many viruses are very specific as to which host species or tissue they attack, each species of virus relies on a particular method for propagation. Plant viruses are often spread from plant to plant by insects and other organisms, known as vectors. Some viruses of animals, including humans, are spread by exposure to infected bodily fluids. Viruses such as influenza are spread through the air by droplets of moisture when people cough or sneeze. Viruses such as norovirus are transmitted by the faecal–oral route, which involves the contamination of hands, food and water. Rotavirus is often spread by direct contact with infected children. The human immunodeficiency virus, HIV, is transmitted by bodily fluids transferred during sex. Others, such as the Dengue virus, are spread by blood-sucking insects.Viral infections can cause disease in humans, animals and even plants. However, they are usually eliminated by the immune system, conferring lifetime immunity to the host for that virus. Antibiotics have no effect on viruses, but antiviral drugs have been developed to treat life-threatening infections. Vaccines that produce lifelong immunity can prevent some viral infections.