specific target cell‚ fusing its envelope with the cell’s membrane and injecting its DNA into the nucleus of the host cell. Once inside the cell‚ this viral DNA replicates itself and also uses the existing machinery within the ‘infected’ cell to make more viral proteins. It then assembles itself and will leave the cell to spread to other cells. The anti-viral acyclovir is taken into the body orally. The acyclovir molecules entering the ‘infected’ cell are converted to acyclovir monophosphate by the thymidine
Premium Immune system Virus DNA
However‚ they can’t maintain a constant internal state (homeostasis). copyright cmassengale 2 What are Viruses? A virus is a noncellular particle made up of genetic material and protein that can invade living cells. copyright cmassengale 3 Viral History copyright cmassengale 4 Discovery of Viruses Beijerinck (1897) coined the Latin name “virus” meaning poison He studied filtered plant juices & found they caused healthy plants to become sick copyright cmassengale 5 Tobacco Mosaic Virus
Premium Virus DNA Bacteria
SOCIALLY RESPONSIBLE Telus Corp. Nowadays many successful companies are making corporate social responsibility a key to business. Telus was selected to one of the Top 50 Socially Responsible Corporation in Canada that Maclean’s published in 2011. In response to the 2011 Alberta fires‚ the company provided free wireless calling‚ a stoppage on billing‚ long-distance calling cards‚ replacement cellphones and over 1‚600 comfort kits for relief workers and residents of Slave Lake (Jantzi-Sustainalytics
Premium Exxon Valdez oil spill
names not used in viral classification Compenents of a virus (lipid bilayer) Viral components: Nucleic Acid • Viral genomes can be either DNA or RNA • This genome‚ once inside a host cell‚ directs synthesis of new viral proteins‚ and also replication of new viral genomes • Viral genomes come in all kinds: • Single- or double-stranded‚ RNA or DNA • Linear or circular • One piece or segmented (in several fragments) (protein) (DNA or RNA) (glycoproteins) Viral components: Capsid
Premium Virus DNA
2.1Identify the signs and symptoms of common childhood illness2.1 The signs and symptoms of five childhood illnesses:Chickenpox • Feeling sick‚ aching and painful muscles‚ headache‚ generally feeling unwell and loss of appetite• Slight temperature‚ over 38ºc‚ before rash develops• Rash usually first appears on body‚ face and scalp‚ it then spreads to limbs• Rash begins as small‚ red‚ flat spots that develop into itchy‚ fluid filled blisters• Blisters are usually ¼“ wide and have a red base• After
Premium Child abuse Childhood Abuse
protein coat . The viral genome can consist of a very small number of genes or up to hundreds of genes depending on the type of virus. Note that the genome is typically organized as a long molecule that is usually straight or circular. Viruses: Capsids The protein coat that envelopes viral genetic material is known as a capsid. A capsid is composed of protein subunits called capsomeres. Capsids can have several shapes: polyhedral‚ rod or complex. Capsids function to protect the viral genetic material
Premium DNA Virus Gene
relation. Biosynthesis The virus’ nucleic acid uses the host cell’s machinery to make large amounts of viral components. For DNA viruses‚ the DNA transcribes itself into messenger RNA (mRNA) molecules which are afterwards used to control the cell’s ribosomes. The first polypeptides that are translated destroy the host’s DNA. In retroviruses ‚ an enzyme called reverse transcriptase translates the viral RNA into DNA‚ which is then translated again into RNA. Assembly New viruses are formed by the assembly
Premium Bacteria DNA Virus
Chapter 21: Diseases of the Respiratory System Question Type: Multiple Choice 1) The upper respiratory tract consists of the: a) pharynx b) nasal cavity c) primary bronchi d) two of these choices Answer: d Difficulty: Easy Learning Objective 1: LO 21.1 Review the anatomy of the upper and lower respiratory tract as it pertains to microbial defenses. Section Reference 1: Section 21.1 Components of the Respiratory System 2) Middle ear infections are common in children because _____. a) they
Premium Influenza Pneumonia Respiratory system
viruses. 2. A microbiologist analyzes chemicals obtained from an enveloped RNA virus that infects monkeys. He finds that the viral envelope contains a protein characteristic of monkey cells. Which of the following is the most likely explanation? ( Concept 19.1) Your Answer: | Its presence is a result of the monkey’s immunological response. | | Correct Answer: | The viral envelope forms as the virus leaves the host cell. | | No. This does not explain the presence of either the envelope or
Premium Virus Influenza Bacteria
occur. (Bryan 1999) Listeriosis can invade the central nervous system‚ causing meningitis and/or encephalitis. (Murano 2003) Infected pregnant women usually experience only a mild‚ flu-like illness; however‚ infection during pregnancy can lead to miscarriage‚ infection of the newborn or even stillbirth. (Silver 1998) In general‚ length of antibiotic treatment increases with the severity of the infection. Meningitis is treated for three weeks while brain abscesses are treated for six weeks. (Davis
Premium Pasteurization Milk Food safety