Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Chapter 8, Problem 3AQ
Under some conditions, it is possible to obtain
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Chapter 8 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 8.1 - How does a virus differ from a cell?Ch. 8.1 - Why does a virus need a host cell?Ch. 8.1 - Compared with cells, what is unusual about viral...Ch. 8.2 - Distinguish between a capsid and a capsomere. What...Ch. 8.2 - What is the difference between a naked virus and...Ch. 8.2 - What kinds of enzymes can be found within the...Ch. 8.3 - What is packaged into capsids during maturation?Ch. 8.3 - Explain the term burst size.Ch. 8.3 - Prob. 3MQCh. 8.4 - What is meant by a viral titer?
Ch. 8.4 - What is a plaque-forming unit?Ch. 8.4 - What is meant by the term plating efficiency?Ch. 8.5 - How does attachment contribute to virushost...Ch. 8.5 - Prob. 2MQCh. 8.5 - What part of phage T4 enters the host cytoplasm?
Ch. 8.6 - Prob. 1MQCh. 8.6 - Prob. 2MQCh. 8.6 - Prob. 3MQCh. 8.7 - Give one example each of T4 early, middle, and...Ch. 8.7 - Prob. 2MQCh. 8.7 - What is required to package the T4 genome into its...Ch. 8.8 - What is a lysogen and what is a prophage?Ch. 8.8 - How does DNA replication in lambda differ from...Ch. 8.8 - What commits lambda to the lytic versus the...Ch. 8.9 - Prob. 1MQCh. 8.9 - Prob. 2MQCh. 8.9 - Prob. 3MQCh. 8.10 - Prob. 1MQCh. 8.10 - Prob. 2MQCh. 8.10 - Prob. 3MQCh. 8.11 - What type of bacteriophages are most common in the...Ch. 8.11 - Prob. 2MQCh. 8.11 - Prob. 3MQCh. 8 - Prob. 1RQCh. 8 - Prob. 2RQCh. 8 - Prob. 3RQCh. 8 - Why does a one-step growth curve differ in shape...Ch. 8 - Describe the events that occur on an agar plate...Ch. 8 - Prob. 6RQCh. 8 - What is required for a bacteriophage T4 virion to...Ch. 8 - Prob. 8RQCh. 8 - Prob. 9RQCh. 8 - Bacteriophage T4 lacks its own RNA polymerase. How...Ch. 8 - Prob. 11RQCh. 8 - Prob. 12RQCh. 8 - Prob. 13RQCh. 8 - Prob. 14RQCh. 8 - Why can it be said that the retrovirus genome is...Ch. 8 - Prob. 16RQCh. 8 - Prob. 17RQCh. 8 - What causes the viral plaques that appear on a...Ch. 8 - The promoters on genes encoding early proteins in...Ch. 8 - Under some conditions, it is possible to obtain...Ch. 8 - Prob. 4AQ
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- After a positive strand RNA virus ( Such as Coronaviruses) enters the host cell, the RNA is translated by ribosomes to create proteins associated with the virus (Such as, for example, the surface antigens like E and Spike proteins). How then, would the genetic material itself be replicated to be incorporated into the new viruses?.arrow_forwardAssume you isolate a single stranded (+) RNA virus. When you examine the proteins in the virus, you find that it does NOT contain replicase enzymes within its capsid. Which of the following is true? This virus must have a gene that encodes replicase. This virus will not be able to enter a host cell. Its genome cannot be translated (the process of translation) by the host cell ribosomes. A DNA copy of the viral genome has to be made before viral genes are expressed. This virus must lack surface antigens.arrow_forwardIn some viruses the flow of information is in reverse that is ,from RNA to DNA.can you suggest a simple name to the process?arrow_forward
- Compare the structure of an icosahedral capsid with that of a helical capsid. How do pentamers and hexamers associate to form a complete icosahedron? Which virus would have a longer helical capsid: a virus with a 7,200 base pair DNA genome or one with an 11,000 base ssRNA genome?arrow_forwardWhy are virus genomes small?arrow_forwardAs a general rule, viruses are not considered to be alive based on several reasons. One such reason is that some viruses use RNA as their genetic material instead of DNA. Which of the five biological themes does this violate? Briefly explain why.arrow_forward
- Given that COVID19 has a single strand RNA for its genome, the number of rounds required to complete replicating 3 viable virus particles? a) 3 b) 4 c) 5 d) 6 e) 9arrow_forwardIf you must create a drug or prescribe a healthy food or drink to target the Covid virus, what part of the virus will you target? Why? Show the functional groups that will interact with the specific part of Covid.arrow_forwardIf a virus particle contained double-stranded B-DNA of 500,000 base pairs, A. How many complete helical turns would occur on each strand? B. How many atoms of phosphorus would be present? C. What would be the length (in Å) of the DNA before packing into the virus?arrow_forward
- If a virus particle contained double-stranded B-DNA of 500,000 base pairs, what would be the radius of the DNA fiber before packing into the virus?arrow_forwardWhat is the significance of the length of a typical viral genome?arrow_forwardWhat is the structure of the influenza virus? What are its unique characteristicsarrow_forward
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