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 8.1, Problem 2MQ
- Why does a virus need a host cell?
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A-C components of the question are corresponding to attached image labeled 1.
D component of the question is corresponding to attached image labeled 2.
For a eukaryotic mRNA, the sequences is as follows where AUGrepresents the start codon, the yellow is the Kozak sequence and (XXX) just represents any codonfor an amino acid (no stop codons here). G-cap and polyA tail are not shown
A. How long is the peptide produced?B. What is the function (a sentence) of the UAA highlighted in blue?C. If the sequence highlighted in blue were changed from UAA to UAG, how would that affecttranslation?
D. (1) The sequence highlighted in yellow above is moved to a new position indicated below. Howwould that affect translation? (2) How long would be the protein produced from this new mRNA?
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Explain why the cell doesn’t need 61 tRNAs (one for each codon).
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You discover a disease causing mutation (indicated by the arrow) that alters splicing of its mRNA. This mutation (a base substitution in the splicing sequence) eliminates a 3’ splice site resulting in the inclusion of the second intron (I2) in the final mRNA. We are going to pretend that this intron is short having only 15 nucleotides (most introns are much longer so this is just to make things simple) with the following sequence shown below in bold. The ( ) indicate the reading frames in the exons; the included intron 2 sequences are in bold.
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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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What Is A Virus ? ; Author: Peekaboo Kidz;https://www.youtube.com/watch?v=YS7vsBgWszI;License: Standard YouTube License, CC-BY