Genetics: From Genes to Genomes, 5th edition
Genetics: From Genes to Genomes, 5th edition
5th Edition
ISBN: 9780073525310
Author: Leland H. Hartwell, Michael L. Goldberg, Janice A. Fischer, Leroy Hood, Charles F. Aquadro
Publisher: McGraw-Hill Education
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Chapter 15, Problem 33P
Summary Introduction

a.

To determine:

The number of genes and operons depicted in the figure, the average gene density, and the representativeness of the value to the most bacterial genomes.

Introduction:

The mentioned figure shows the RNA-Seq results from the RNA-Seq experiment. In the analysis part, the computer lines up each of cDNA sequence read with the genome sequence of the bacterium.

Summary Introduction

b.

To determine:

Whether the given data proves that t2110 is nonfunctional and the process by which scientists were able to assign a direction to the transcription when no transcript of the gene was found.

Introduction:

In the performed experiment, it was found that no transcripts for the gene t2110 were detected.

Summary Introduction

c.

To determine:

The evidence that suggests the existence of an attenuation or riboswitch mechanism, causing premature transcriptional termination of an operon and the observation of any of the operon that might be controlled by such a mechanism.

Introduction:

The process of attenuation is considered as the method of control in some bacterial operons, and it causes premature termination of transcription.

Summary Introduction

d.

To determine:

The depiction of the given figure if the antisense mechanism was involved in controlling the gene or operon.

Introduction:

The mentioned figure does not provide any evidence that any of the genes or operons are regulated by an antisense transcript.

Summary Introduction

e.

To determine:

The possibility of the transcription of the galM gene from the different promoter.

Introduction:

The given figure depicts galM gene to be a part of the operon containing galETK. There is even a possibility that galM is transcribed from a separate promoter.

Summary Introduction

f.

To determine:

Whether the data shown in the figure reveal the presence of a regulatory mechanism in relation to an sRNA occluding the ribosome binding site.

Introduction:

The ribosome binding site is present in upstream to the start codon. It is a sequence of nucleotides which play an important role in recruiting the ribosome at the initiation of the translation process.

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Students have asked these similar questions
The following table lists 4 bacterial strains that are partial diploids for lac operon genes. Given the activity of beta-galactosidase measured for each strain in the absence (-lac) or presence (+lac) of lactose, complete the table by choosing the appropriate symbol (+, -, C, S) to indicate the allele of the gene or site missing from the table (blue numbers). strain A BC 5 C D 7 chromosome I O 1 2 4 1 [Select] 9 3 [Select] [Select] [Select] 9 [Select] + + Z + + 6 + I +5 + 10 plasmid O 3 + 7 C Z + 8 8 2 [Select] 4 [Select] 6 [Select] B-gal act. -lac +lac 0.002 0.003 0.002 0.058 0.063 0.121 0.059 0.062 Select] 1 ✔ [ Select] + is C S
A number of mutations affect the expression of the lac operon in E. coli. The genotypes of several E. coli strains are shown below. ("+" indicates a wild-type gene with normal function and "-" indicates a loss-of-function allele.) Please predict which of the following strains would have the highest beta-galactosidase enzyme activity, when grown in the lactose medium. O CAP+ r* p* o* z O CAP* I P* o* z* O CAP* r* P O* z* O CAP I P* O z*
The following table lists 4 bacterial strains that are partial diploids for lac operon genes. Given the activity of beta-galactosidase measured for each strain in the absence (-lac) or presence (+lac) of lactose, complete the table by choosing the appropriate symbol (+, -, C, S) to indicate the allele of the gene or site missing from the table (blue numbers). + = wildtype, - = null mutation, c = constitutive, s =super repressor chromosome plasmid B-gal act. strain 10 Z A 1 C B 3 4 + C + 6 D 9 + 1 [Select] 3 [Select] 5 [Select] 7 [ Select] 9 [Select] | 0 2 + + 5 + 7 10 Z + -lac +lac 0.062 0.058 0.003 0.004 0.062 0.117 0.003 0.060 + 8 + 2 [Select] 4 [Select] 6 [Select] 8 [Select] 10 [Select]

Chapter 15 Solutions

Genetics: From Genes to Genomes, 5th edition

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Bacterial Genomics and Metagenomics; Author: Quadram Institute;https://www.youtube.com/watch?v=_6IdVTAFXoU;License: Standard youtube license