EBK MICROBIOLOGY:W/DISEASES BY BODY...-
5th Edition
ISBN: 9780134608242
Author: BAUMAN
Publisher: PEARSON
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Chapter 8, Problem 2CT
CRITICAL THINKING
2 A cancer-inducing virus, HTLV-1, inserts itself into a human chromosome, where it remains. How can a laboratory technician prove that a patient is infected with HTLV-1 even when there is no sign of cancer?
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Chapter 21 retrovirus Question - Multiple Choice
Part A
Do all viruses that contain RNA also have reverse transcriptase?
Yes, all RNA viruses are retrovirus.
No, some RNA viruses use the host machinery to make protein, but, no viral DNA is ever made.
Yes, the only way to make replicate an RNA virus is to reverse transcribe the RNA into DNA.
No, some RNA viruses also have DNA and do not need reverse transcriptase
Yes, Reverse transcriptase is an enzyme in all viruses.
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VIRUS
why do they steal cell membranes
why are they not considered alive
viruses:1. Why must primary cell cultures be restarted every so often when preparing primary cell cultures to observe morphological changes caused by cells infected by a virus? Why are tumor cells preferred?
2. Why are non-enveloped viruses generally more resistant to disinfectants than are enveloped viruses?
3. A public health physician isolated large number of phages from rivers used as a source of drinking water in western Africa. They physician is very concerned that humans might become ill from drinking this water, although she knows that the phages specifically attack bacteria. Why is she concerned?
Chapter 8 Solutions
EBK MICROBIOLOGY:W/DISEASES BY BODY...-
Ch. 8 - Why arent the terms recombinant DNA technology...Ch. 8 - Prob. 2TMWCh. 8 - Why wasnt polymerase chain reaction (PCR)...Ch. 8 - Why dont doctors routinely insert genes into their...Ch. 8 - Prob. 5TMWCh. 8 - Which of the following statements is true...Ch. 8 - A DNA gene synthesized from an RNA template is...Ch. 8 - Prob. 3MCCh. 8 - Prob. 4MCCh. 8 - Prob. 5MC
Ch. 8 - Prob. 6MCCh. 8 - Prob. 7MCCh. 8 - Prob. 8MCCh. 8 - Prob. 9MCCh. 8 - Prob. 10MCCh. 8 - Modified True/False 1. ________ Restriction...Ch. 8 - Modified True/False 2. ________ Restriction...Ch. 8 - Prob. 3MTFCh. 8 - Prob. 4MTFCh. 8 - Prob. 5MTFCh. 8 - Label the reagents and steps of PCR on the figure...Ch. 8 - Describe three artificial methods of introducing...Ch. 8 - Prob. 2SACh. 8 - Prob. 3SACh. 8 - Prob. 4SACh. 8 - List three potential problems of recombinant DNA...Ch. 8 - Examine the restriction sites listed in Table 8.1...Ch. 8 - CRITICAL THINKING 2 A cancer-inducing virus,...Ch. 8 - A thermocycler uses DNA polymerase from...Ch. 8 - Prob. 4CTCh. 8 - Prob. 5CTCh. 8 - Prob. 6CTCh. 8 - Prob. 7CTCh. 8 - Prob. 8CTCh. 8 - Prob. 9CTCh. 8 - Using the following terms, fill in the following...
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- Which statement is true of viroids? They are single-stranded RNA particles They reproduce only outside of the cell They produce proteins They affect both plants and animals.arrow_forwardWhich statement is true of viral replication? In the process of apoptosis, the cell survives During attachment, the virus attaches at specific sites on the cell surface The viral capsid helps the host cell produce more copies of the viral genome mRNA works outside of the host cell to produce enzymes and proteins.arrow_forwardWhich is true of DNA viruses? They use the host cell's machinery to produce new copies of their genome They all have envelopes They are the only kind of viruses that can cause cancer They are not important plant pathogens.arrow_forward
- Which statement is true of reverse transcriptase? It is a nucleic acid It infects cells It transcribes RNA to make DNA. d. It is a lipid.arrow_forwardViruses. all have a round shape cannot have a long shape do not maintain any shape vary in shapearrow_forwardFigure 21.10 Which of the following statements is false? In the lytic cycle, new phages are produced and released into the environment. In the lysogenic cycle, phage DNA is incorporated into the host genome. An environmental stressor can cause the phage to initiate the lysogenic cycle. Cell lysis only occurs in the lytic cycle.arrow_forward
- Part B - Viral Classification: The Baltimore Scheme The Baltimore classification scheme is based on the relationship between the virus' genome and its mRNA. For the following choices, indicate which viruses would fall into each classification: 1) require reverse transcriptase to copy the information in their own genome to DNA; 2) can replicate and be transcribed in the same manner as the cell's own genetic material; and 3) a replicative form of DNA must be produced and is used for both replication and transcription. Drag and drop choices to the bins they describe. double-stranded DNA viruses Requires reverse transcriptase double-stranded RNA viruses retroviruses double-stranded DNA viruses that have an RNA intermediate Functions similarly to cell's own genetic material plus-strand RNA viruses minus-strand RNA viruses Reset Help plus-strand DNA viruses Uses a replicative form of DNAarrow_forwarda. Škin rashes Increased white blood cell count Preventing Disease weakened or killed pathogens used to an 1. response (usually a shot) 2. blocking the growth and reproduction of bacteria (usually pills) Controlling Bacteria 1. -subjecting bacteria to high temperatures chemical solutions that kill bacteria 2. 3. refrigerating, boiling, frying, and steaming food Examples of Bacterial Diseases 1. Disease - carried by ticks, red dot 2. -contraction of skeletal muscles 3. Throat - cough and spots in back of mouth 4. Viruses What is a Virus? Viral Structure disease causing particle Capsid (protein sheath) RNA Envalope protein 1. 2. No -DINA Envelope structures (nucleus, cytoplasm, ,or cell membrane) Proteins Capsid 3. Requires a 4. No cellular 5. Can be called a cell Enzyme Bacteriophage Tobasoo mosalo viruA (TMV) Human Immunadsficiency virus 0V)arrow_forwardVIRUS DNA- Capsid- I. I. HOST CELL Viral DNA MRNA W Capsid proteins Viral DNA IV. Viral reproductive cycle What is happening at the point marked I in the diagram? The virus exits the host cell The virus recognizes the host cell due to specific receptors on the viral envelope The virus enters the host cell Glycoproteins on the viral envelope bind to specific receptors on the host cell 00 000 000 O 00 00arrow_forward
- false true Viruses do not reproduce .within host cell Phagocytosis is type of Lactive transport R.B.Cs have no mitochondria Phospholipids have similar structure to fat Prokaryotic cell has no mitochondria Channel protein form a small opening through the cell membrane All nucleic acids have no oxygen In prophase stage chromosomes become shorter Cell is defined as basic functional unit of living .organism Phospholipid bilayer of cell membrane has hydrophilic head only O Oarrow_forwardCan you help? I cannot seem to figure out all of the correct answers. I know lysis and budding is one but what is the other (s)? I am so lost! Thanks! Can Egress by viruses from the host cell occur by lysis or budding? Does egress by viruses immediately kill it? Does egress by viruses from the host cell happen after replication of its protein and genetic components and before assembly into new viruses? Is egress by virus from the host cell part of either lytic or lysogenic cycles?arrow_forwardCan i get a help answering this question: The case study tells you that the HIV virus exits the cell by budding, but how can you tell that just based on the structure of the HIV virus? (see attached for the case study)arrow_forward
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1) Cell Culture Tutorial - An Introduction; Author: Applied Biological Materials - abm;https://www.youtube.com/watch?v=RpDke-Sadzo;License: Standard youtube license