Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 18.2, Problem 2CC
Summary Introduction
To analyze:
The information provided regarding gene expression by a fluorescent spot appears on a microarray
Introduction:
DNA microarray is used to monitor expression of thousands of genes simultaneously. It is a collection of single stranded DNA spots with a known gene attached to a solid surface made of silica, glass or plastics. Each spot contains multiple copies of the particular gene.
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Microarrays can be used to determine relative levels of gene expression. In one type of microarray, hybridization of red (experimental) and green (control) labeled cDNAs is proportional to the relative amounts of mRNA in the samples. Red indicates the overexpression of a gene and green indicates the underexpression of a gene in the experimental cells relative to the control cells, yellow indicates equal expression in experimental and control cells, and no color indicates no expression in either experimental or control cells.In one experiment, mRNA from a strain of antibiotic-resistant bacteria (experimental cells) is converted into cDNA and labeled with red fluorescent nucleotides; mRNA from a nonresistant strain of the same bacteria (control cells) is converted into cDNA and labeled with green fluorescent nucleotides. The cDNAs from the resistant and nonresistant cells are mixed and hybridized to a chip containing spots of DNA from genes 1 through 25. The results are shown in the…
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Chapter 18 Solutions
Principles of Biology
Ch. 18.1 - In the procedure shown in this figure, has the...Ch. 18.1 - Refer back to Figure 9.16. Why are primers needed...Ch. 18.1 - Prob. 2CCCh. 18.1 - Prob. 3CCCh. 18.1 - Prob. 4CCCh. 18.1 - Prob. 2BCCh. 18.1 - Prob. 1TYKCh. 18.1 - Prob. 2TYKCh. 18.1 - Prob. 3TYKCh. 18.2 - Prob. 1CC
Ch. 18.2 - Prob. 2CCCh. 18.2 - Prob. 1TYKCh. 18.2 - Prob. 2TYKCh. 18.2 - Prob. 3CCCh. 18.3 - Prob. 1TYKCh. 18.4 - Prob. 1CCCh. 18.4 - Prob. 1BCCh. 18.4 - The sizes of eukaryotic genomes vary because more...Ch. 18.4 - The members of a gene family are called paralogs....Ch. 18.5 - Prob. 1CCCh. 18.5 - Based on their mechanism of movement, which type...Ch. 18.5 - Prob. 1TYKCh. 18.5 - A segment of DNA that moves via an RNA...Ch. 18 - Prob. 1TYCh. 18 - Prob. 2TYCh. 18 - Lets suppose you followed the protocols described...Ch. 18 - Prob. 4TYCh. 18 - Lets suppose you want to clone a gene that has...Ch. 18 - In the CRISPR-Cas technology used for mutating...Ch. 18 - Prob. 7TYCh. 18 - Prob. 8TYCh. 18 - Prob. 9TYCh. 18 - Prob. 10TYCh. 18 - Draw the structure of a dideoxyribonucleotide...Ch. 18 - Prob. 2CCQCh. 18 - Prob. 3CCQCh. 18 - Identify and discuss three important advances that...Ch. 18 - Prob. 2CBQ
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- Microarrays can be used to determine relative levels of gene expression. In one type of microarray, hybridization of red (experimental) and green (control) labeled cDNAs is proportional to the relative amounts of mRNA in the samples. Red indicates the overexpression of a gene and green indicates the underexpression of a gene in the experimental cells relative to the control cells, yellow indicates equal expression in experimental and control cells, and no color indicates no expression in either experimental or control cells.arrow_forwardIn Northern and Western blotting, what is the purpose of gel electrophoresis?arrow_forwardIs this a sequencing by synthesis method? Explain.arrow_forward
- Briefly describe the method of chromatin immunoprecipitation sequencing (ChIP-Seq). How is it used to determine nucleosome positions within a genome?arrow_forwardBoth microarray and RNA-sequencing can study the transcriptomes. Compare microarray and RNA sequencing technique in analyzing gene with high, medium and low copy number of genes.arrow_forwardDescribe the outcome of a chain-terminator sequencing procedure in which (a) too few primers are present or (b) an excess of primers is present.arrow_forward
- How can deletion experiments within gene sequences help identify important DNA sequences for the expression of a gene? Discuss how this was done to initially identify UP elements. What is the result of deleting an UP element?arrow_forwardThe best molecular technique to quantify the gene transcripts is (write in full).arrow_forwardFrom your knowledge about DNA microarray, answer the following: A- How DNA microarray is created? and why it is referred to as “hybridization technology”? B- Why RT-PCR is important in the sample preparation to perform expression microarray experiment? C- Mention the name and the color of the dyes used in expression microarray? D- If the expression microarray experiment was done with a normal sample and a suspected sample, after reading the color pattern resulted from the experiment it was recorded that “gene A22” is expressed in the suspected sample. The gene A22 is clinically linked to colon cancer. Answer the following: What is the expected color of the spot on the microarray which represents this gene? What is your interpretation of the suspected sample; is it a cancer sample or not and explain why?arrow_forward
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