BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
12th Edition
ISBN: 9781264058167
Author: Raven
Publisher: MCG CUSTOM
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Chapter 27.3, Problem 2LO
Summary Introduction
To describe: The way through which the genes are mapped in E. coli.
Introduction: All life forms are classified into three main domains, namely,archaea, bacteria, and eukarya. These three domains are classified based on the type of cells of the organisms. The prokaryotes are unicellular microorganisms that lack membrane-bounded organelles and nucleus.
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Give one examples of mutaion?
A gene contains the sequence CGCATACGGTAC that results in the amino acid sequence arg-ile-arq-
tyr. A mutation in this gene has a G inserted after the second C in the strand.
How will this mutation affect the phenotype?
A)This will affect the phenotype because although most of the protein will be identical, the first amino
acid will be different.
B)This will not affect the phenotype because only the second amino acid is different from the original
protein.
C)This will not affect the phenotype because the protein will be identical to the original protein.
D)This will affect the phenotype because all of the amino acids after the first one will be different from
the original protein.
Describe how one might determine which proteins in E.coli are repressed when a culture is shifted from a minimal medium to a rich medium containing many amino acids, bases and vitamins. How might one study which genes are expressed during each growth condition?
Chapter 27 Solutions
BIOLOGY(LL)-W/ACCESS CODE >CUSTOM<
Ch. 27.1 - Prob. 1LOCh. 27.1 - Prob. 2LOCh. 27.1 - Describe classification systems for prokaryotes.Ch. 27.2 - Prob. 1LOCh. 27.2 - Prob. 2LOCh. 27.2 - Prob. 3LOCh. 27.3 - Prob. 1LOCh. 27.3 - Prob. 2LOCh. 27.3 - Prob. 3LOCh. 27.4 - Describe the metabolic strategies employed by...
Ch. 27.4 - Compare and contrast the ways prokaryotes can...Ch. 27.5 - Describe the role of prokaryotes in biogeochemical...Ch. 27.5 - Prob. 2LOCh. 27.5 - Prob. 3LOCh. 27.6 - Prob. 1LOCh. 27.6 - Prob. 2LOCh. 27.6 - Prob. 3LOCh. 27 - Data analysis If the excision of an F plasmid Is...Ch. 27 - Prob. 1IQCh. 27 - Prob. 1UCh. 27 - A bacteria that obtains carbon from the atmosphere...Ch. 27 - Prob. 3UCh. 27 - Bacteria and archaebacteria may be distinguished...Ch. 27 - Prob. 5UCh. 27 - Prob. 6UCh. 27 - Prob. 7UCh. 27 - Prob. 1ACh. 27 - Prob. 2ACh. 27 - Prob. 3ACh. 27 - Prob. 4ACh. 27 - Prob. 5ACh. 27 - Some bacteria are capable of forming NH4+ from...Ch. 27 - Prob. 7ACh. 27 - Prob. 1SCh. 27 - Prob. 2SCh. 27 - Use of multiple antibiotics is not a bad idea if...Ch. 27 - Soil-based nitrogen-fixing bacteria appear to be...
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- Discuss the following statement: “from the nucleotide sequence of a cDNA clone, the complete amino acid sequence of a protein can be deduced by applying the genetic code. thus, protein biochemistry has become superfluous because there is nothing more that can be learned by studying the protein.”arrow_forwardTwo bacterial genes are transduced simultaneously. What does this suggest about the location of the two genes relative to each other?arrow_forwardDiscuss the problems associated with the expression of foreign genes in E.coli.arrow_forward
- Describe what would happen to the lac operon in a low-lactose environment and in a high lactose environment. a) How will each of these environments affect gene expression? b) What would happen to the repressor in each case? c) How will each of these environments affect RNA polymerase?arrow_forwardWhat are mutagenicagents?arrow_forwardPls briefly describe point mutation.arrow_forward
- The following double stranded segment of DNA is part of a protein coding gene. The segments in uppercase letters (ACTG) represent the exons. The segments in lowercase letters (acgt) represent introns. The lower strand is the template strand that is used by the RNA polymerase to make an RNA transcript. Draw or write-out a) the sequence of the primary transcript and b) the mature mRNA resulting from this stretch of DNA.arrow_forwardWhat is an operon? Describe the functions of regulators, promoters,and operators.arrow_forwardDefine Crygc gene.arrow_forward
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