Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 8, Problem 2AQ
The promoters on genes encoding early proteins in viruses like T4 have a different sequence than the promoters on genes encoding late proteins in the same virus. Explain how this benefits the virus.
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Chapter 8 Solutions
Brock Biology of Microorganisms (15th 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. 8.1 - Once inside a host prokaryotic cell, what are the...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. 8.2 - Where does the envelope surrounding animal viruses...Ch. 8.3 - What is packaged into capsids during maturation?Ch. 8.3 - Explain the term burst size.
Ch. 8.3 - Prob. 3MQCh. 8.3 - Why does a one-step growth curve differ in shape...Ch. 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. 8.4 - Describe the events that occur on an agar plate...Ch. 8.5 - How does attachment contribute to virushost...Ch. 8.5 - Prob. 2MQCh. 8.5 - Prob. 3MQCh. 8.5 - What is required for a bacteriophage T4 virion to...Ch. 8.6 - Prob. 1MQCh. 8.6 - Give one example each of T4 early, middle, and...Ch. 8.6 - What is required to package the T4 genome into its...Ch. 8.6 - Bacteriophage T4 lacks its own RNA polymerase. How...Ch. 8.7 - What is a lysogen and what is a prophage?Ch. 8.7 - How does DNA replication in lambda differ from...Ch. 8.7 - What commits lambda to the lytic versus the...Ch. 8.7 - What enzyme is required to form a prophage, and...Ch. 8.8 - Prob. 1MQCh. 8.8 - What is the difference between a persistent and a...Ch. 8.8 - Prob. 3MQCh. 8.8 - Why can it be said that the retrovirus genome is...Ch. 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...
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- involved in the transfer of multiple drug resistance from one cell to another? * a.Transposition b. Conjugation with a cell with chromosomal drug resistance appears in the genome of a bacteriophage that has infected it. c. Transformation of chromosomal genes d. Conjugation with a cell with a free plasmid carrying drug resistancearrow_forwardRabies virus and poliovirus both have singlestranded RNA genomes, but only in poliovirus can thegenome be translated directly. Explain.arrow_forwardGive typing answer with explanation and conclusion In eukaryotes, repressors can function by: Select one: binding to the regulatory promoter blocking DNA polymerase binding binding to the polyA tail blocking ribosome bindingarrow_forward
- A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. It does this by inserting its genetic material (RNA) into the host cell and integrate its genetic material with the host genome. Explain in details how organisms eliminate the expression of viral genes? How this mechanism can prevent virus infections?arrow_forwardContrast mRNA production in the two classes of single-strandedRNA viruses.arrow_forwardSome organisms have mechanisms in place that will override transcription termination. One such mechanism using the Tat protein is employed by the HIV retrovirus. Explain why Tat is therefore a good target for HIV vaccination.arrow_forward
- Find out if BamHI is a good restriction endonuclease for cutting the SARS-COV-2 genome? Give reasons.arrow_forwardTargeting vectors use homologoues recombination to insert transgenes at specific chosen locations in the host genome. Discuss this statement.arrow_forwardExplain the meaning of the name reverse transcriptase.arrow_forward
- What would happen to the ability of bacteriophage λ tolyse a host cell if it acquired a mutation in the OR bindingsite for the Cro protein? Why?arrow_forwardWhy can’t retrotransposons move from one cell to another like retroviruses?a. Because they do not encode the Env proteinb. Because they are nonautonomous elementsc. Because they require reverse transcriptased. a and b are both true.arrow_forwardWith regard to transcriptional termination in eukaryotes, which model suggests that RNA polymerase is physically removed from the DNA? a. Allosteric model b. Torpedo model c. Both models d. Neither modelarrow_forward
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