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 14.1, Problem 2MQ
- What are three reasons that functional traits might not correspond with distinct phylogenetic groups as defined by 16S ribosomal RNA gene sequences?
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The phylogenetic tree of the OCTN homologs below was generated with the following accession numbers as basis:
NP_957143.1 - OCTN of unknown function
CDM63451.1 - OCTN specific for ergothioneine transport
XP_021324939.1 - OCTN specific for carnitine transport
Design the phylogenetic tree to make it look more interesting by highlighting the distinct clades or putting a visual emphasis on the gene you are trying to analyze. Provide a caption for this figure.
What is "homology"?
What is BLAST and how is it used?
What’s a major assumption when drawing evolutionary relationships between organisms based onDNA sequences?
Here is some information about the sequences:
There are two images given; one with sequences and the other with a figure.
All these sequences, “SEQUENCE_21” to “SEQUENCE_27” are in the same subfamily or “clade” of a large phylogenetic alignment of all Rab proteins in these three species (see “Image with a figure” for a full view of gene family in humans, plants and yeast, see the “D” branch towards the bottom of the tree in Figure). “SEQUENCE_28” is a different Rab protein (actually it is the Rab39 protein at the bottom of the tree).
“SEQUENCE_21” is from yeast.
“SEQUENCE_22” to “SEQUENCE_25” are from the plant, Arabidopsis.
“SEQUENCE_26” and “SEQUENCE_27” are from humans.
Question: Based on the information above, what can you speculate about the possible evolution of the genes that “SEQUENCE_21” to “SEQUENCE_27” represent?
Chapter 14 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 14.1 - Why is it necessary to consider microbial...Ch. 14.1 - What are three reasons that functional traits...Ch. 14.2 - What form of photosynthesis was most likely the...Ch. 14.3 - What are the differentiating properties of the...Ch. 14.3 - Prob. 2MQCh. 14.4 - What is the source of the purple color from which...Ch. 14.4 - Prob. 2MQCh. 14.5 - What are some similarities between purple...Ch. 14.5 - Prob. 2MQCh. 14.6 - Prob. 1MQ
Ch. 14.6 - Prob. 2MQCh. 14.7 - Prob. 1MQCh. 14.7 - Prob. 2MQCh. 14.8 - What types of anoxygenic phototrophs contain...Ch. 14.8 - Prob. 2MQCh. 14.9 - What are the typical electron donors used by...Ch. 14.9 - What bacterial phyla are known to contain...Ch. 14.10 - What are the typical electron donors used by...Ch. 14.10 - Prob. 2MQCh. 14.11 - Describe the energy and carbon metabolism of...Ch. 14.11 - What are some ecological strategies that sulfur...Ch. 14.12 - What mechanisms do free-living diazotraphs use to...Ch. 14.12 - Prob. 2MQCh. 14.13 - Under what conditions would you expect...Ch. 14.13 - Prob. 2MQCh. 14.14 - In what phylogenetic groups are Geobacter and...Ch. 14.14 - Prob. 2MQCh. 14.15 - What habitat characteristics govern the diversity...Ch. 14.15 - How do aerobic neutrophilic iron-oxidizers keep...Ch. 14.16 - Prob. 1MQCh. 14.16 - Prob. 2MQCh. 14.17 - What is the difference between a methanotroph and...Ch. 14.17 - What is unique about the methanotroph...Ch. 14.18 - Prob. 1MQCh. 14.18 - Prob. 2MQCh. 14.19 - Prob. 1MQCh. 14.19 - What are the different ways in which species of...Ch. 14.20 - What are the major differences between spirochetes...Ch. 14.20 - Name two diseases of humans caused by spirochetes.Ch. 14.21 - Prob. 1MQCh. 14.21 - Prob. 2MQCh. 14.22 - Describe how a sheathed bacterium such as...Ch. 14.22 - List two metals that are oxidized by sheathed...Ch. 14.23 - What benefit do magnetic bacteria accrue from...Ch. 14.23 - Would you expect to find greigite or magnetite in...Ch. 14.24 - Prob. 1MQCh. 14.24 - Prob. 2MQCh. 14 - What is convergent evolution and how is it...Ch. 14 - Which bacterial phyla contain phototrophs?Ch. 14 - How are prochlorophytes, such as Prochlorococcus,...Ch. 14 - Compare and contrast the metabolism, morphology,...Ch. 14 - Compare and contrast the metabolism of purple...Ch. 14 - REVIEW QUESTIONS
6. In what group of organisms...Ch. 14 - Prob. 7RQCh. 14 - In what ways is Chloracidobacterium thermophilum...Ch. 14 - Prob. 9RQCh. 14 - In what ways are sulfur-reducing bacteria...Ch. 14 - Prob. 11RQCh. 14 - What are some ways that diazotrophs protect...Ch. 14 - Prob. 13RQCh. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - Prob. 16RQCh. 14 - Prob. 17RQCh. 14 - What are the differences between type I and type...Ch. 14 - Prob. 19RQCh. 14 - Compare and contrast the life cycle of Myxococcus...Ch. 14 - Contrast the motility of spirochetes with that of...Ch. 14 - Contrast the life cycle of Hyphomicrobium with...Ch. 14 - Prob. 23RQCh. 14 - In what way does a magnetosome contribute to the...Ch. 14 - Prob. 25RQCh. 14 - Describe a key physiological feature of the...Ch. 14 - APPLICATION QUESTIONS
2. Describe the metabolism...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Explain how the different “-omics” involved with the three major parts of the central dogma can be used to study this new species. What are molecular techniques/tools (sequencers) that can be used to study each of these? How would you sequence the genome efficiently (i.e., lowest amount of time and money)?arrow_forwardThe SCAM data for positions V51C and Y96C are different to the other datasets. Describe how the data for these positions are different to the other positions. In each case, explain what the structural basis of these differences may be.arrow_forwardHere is some information about the sequences: All these sequences, “SEQUENCE_21” to “SEQUENCE_27” are in the same subfamily or “clade” of a large phylogenetic alignment of all Rab proteins in these three species (see “Figure 1.pdf” for a full view of gene family in humans, plants and yeast, see the “D” branch towards the bottom of the tree in Figure 1). “SEQUENCE_28” is a different Rab protein (actually it is the Rab39 protein at the bottom of the tree). “SEQUENCE_21” is from yeast. “SEQUENCE_22” to “SEQUENCE_25” are from the plant, Arabidopsis. “SEQUENCE_26” and “SEQUENCE_27” are from humans. Question: Based on the information above, what can you speculate about the possible evolution of the genes that “SEQUENCE_21” to “SEQUENCE_27” represent? (write 5 points at least).arrow_forward
- Count the instances where there is any difference in the amino acid in the alignment of the six sequences and write that number below. Did you find any clades in this alignment? Describe your results. You must describe in detail the relationships between the sequences in this tree. Describe in detail how this combined tree changed the relationships between the sequences in comparison to the two separate trees that you created in the previous section abovearrow_forwardCarl Woese has recognized that genes encoding rRNAs are excellent candidates for phylogenetic analysis. Identify at least 4 characteristics/properties of these rRNA genes which make them good molecular chronometers.arrow_forwardCarl Woese discovered that genes encoded for rRNAs are good candidates for phylogenetic analysis. Determine at least four characteristics/properties of these rRNA genes that make them effective molecular chronometers.arrow_forward
- What are two reasons for the wide variation in genome sizes among eukaryotic species?arrow_forwardWhat are molecular scissors? Explain their role.arrow_forwardMolecular marker is used to determine relatedness of species which may directly or indirectly exerts an effect on diversity. A hypothetical ancestor has the following DNA sequences: G A A G C T A T T C A T T. There are two lineage with DNA sequences of G A A G G T A T T C T C G, and G A A C C T A T T C T G C. (1) Determine the percentage of A and T in the DNA sequence of the hypothetical ancestor. (2) Calculate the percentage of each nitrogenous base in the second lineage.arrow_forward
- When comparing evolutionary similarities between different genes within a gene family, it is usually more straightforward to compare genes by using the protein sequences of gene products rather than DNA sequences of the genes themselves. Explain why this is the case. (Include 4 succinct points at least)arrow_forwardThis question refers to the following table, which compares the percent sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (e.g., Intron I is the one closest to the promoter). The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A. % Sequence Homology Species Intron I Exon I Intron VI Exon VI A 100 100 100 100 В 98 99 82 96 C 98 99 89 96 D 99 99 92 97 E 98 99 80 94 Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock? Intron VI Exon I Exon VI Intron Iarrow_forwardCompare genome size, gene number, and gene density (a) in the threedomains and (b) among eukaryotes.arrow_forward
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