Genetics: Analysis and Principles
Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 15, Problem 12CONQ
Summary Introduction

To review:

A. The prevention of the function of the glucocorticoid receptor.

B. The enzyme required to inhibit the transcription activation by CREB protein.

Introduction:

The CREB protein(cyclic adenosine monophosphate response element binding protein) and the glucocorticoid receptors work asactivators of transcription of genes. Specific sites on DNA (deoxyribonucleic acid)gets bind with CREB protein and promote the transcription of target genes. They regulate the gene expression in a cell.

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Which of the following is the most likely result of a mutation in the lac operator that prevents release of the depressor protein? Choose 1 answer: (A)The lactose permease protein will be produced, even in the absence of lactose. (B) Transcription of the structural genes will be blocked, even in the presence of lactose. (C) The catabolite activator protein will be bound to the CAP site, even in the presence of glucose. (D) Expression of the lacI gene will be repressed, even in the absence of glucose.
Now read this abstract from a 2013 journal article What is the authors' explanation of how Gal80p works? Note UASG from the question above is the same as UASGAL The DNA-binding transcriptional activator Gal4 and its regulators Gal80 and Gal3 constitute a galactose-responsive switch for the GAL genes of Saccharomyces cerevisiae. Gal4 binds to GAL gene UASGAL. (upstream activation sequence in GAL gene pro- moter) sites as a dimer via its N-terminal domain and activates transcription via a C-terminal transcription activation domain (AD). In the absence of galactose, a Gal80 dimer binds to a dimer of Gal4, masking the Gal4AD. Galactose triggers Gal3-Gal80 interaction to rapidly initiate Gal4-mediated transcription activation. Just how Gal3 alters Gal80 to relieve Gals0 inhibition of Gal4 has been unknown, but previous analyses of Gal80 mutants suggested a possible competition between Gal3-Gal80 and Gal80 self-association interactions. Here we assayed Gal80-Gal80 interactions and tested for…
If I have discovered a mutation in the glucocorticoid reception that does not prevent thebinding of glucocorticoid hormone to the protein but prevents the ability of the receptor toactivate transcription, what are all of the possible defects that may explain why transcriptioncannot be activated?

Chapter 15 Solutions

Genetics: Analysis and Principles

Ch. 15.4 - Prob. 1COMQCh. 15.5 - The overall goal of the ENCODE Project is a. to...Ch. 15.6 - The binding of iron regulatory protein (IRP) to...Ch. 15 - Discuss the common points of control in eukaryotic...Ch. 15 - 2. Discuss the structure and function of...Ch. 15 - 3. What is meant by the term transcription factor...Ch. 15 - What are the functions of transcriptional...Ch. 15 - 5. Is each of the following statements true or...Ch. 15 - 6. Transcription factors usually contain one or...Ch. 15 - Prob. 7CONQCh. 15 - Prob. 8CONQCh. 15 - 9. Let’s suppose a mutation in the glucocorticoid...Ch. 15 - Prob. 10CONQCh. 15 - Prob. 11CONQCh. 15 - Prob. 12CONQCh. 15 - 13. Transcription factors such as the...Ch. 15 - An enhancer, located upstream from a gene, has the...Ch. 15 - 15. The DNA-binding domain of each CREB protein...Ch. 15 - The gene that encodes the enzyme called tyrosine...Ch. 15 - Prob. 17CONQCh. 15 - 18. What is a histone variant? Ch. 15 - Prob. 19CONQCh. 15 - 20. What is meant by the term histone code? With...Ch. 15 - Prob. 21CONQCh. 15 - Histones are thought to be displaced as RNA...Ch. 15 - 23. What is an insulator? Describe two different...Ch. 15 - 24. What is DNA methylation? When we say that DNA...Ch. 15 - Lets suppose that a vertebrate organism carries a...Ch. 15 - 26. What is a CpG island? Where would you expect...Ch. 15 - Describe how the binding of iron regulatory...Ch. 15 - 1. Briefly describe the method of chromatin...Ch. 15 - Researchers can isolate a sample of cells, such as...Ch. 15 - Prob. 3EQCh. 15 - Prob. 4EQCh. 15 - Prob. 5EQCh. 15 - 6. As described in Chapter 21, an electrophoretic...Ch. 15 - Prob. 7EQCh. 15 - 1. Explain how DNA methylation could be used to...Ch. 15 - 2. Enhancers can occur almost anywhere in DNA and...
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QCE Biology: Introduction to Gene Expression; Author: Atomi;https://www.youtube.com/watch?v=a7hydUtCIJk;License: Standard YouTube License, CC-BY