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Cards In This Set
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Those genes that encome essential cellular functions are expressed continually are said to be _________. A gene that is not regulated but continually expressed.
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Constitutive
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Causes the continuous transcritption of one or more structural genes
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Constitutive mutation
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Gene regulation in which the binding of a regulatory proteins to DNA stimulates transciption (the regulatory protein is an activator)
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Positive gene regulation (positive control)
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Gene regulation in which the binding of a regulatory protein to DNA inhibits trancription the regulatory protein is a repressor)
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Negative control
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The mechanisms and systems that control the expression of genes.
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Gene regulation
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Typically consisting of 60 to 90 amino acids that are responsible for binding to DNA -- functional part of the protein
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Domain
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Within a domain, only a few amino acids actually make contact with the DNA. These amino acids often form ______ bonds with the bases or interact with the sugar-phosphate backbone of the DNA.
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Hydrogen
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Why is transcription a particularly important level of gene regulation in both bacterial and eukaryotes?
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Because it is the first step in the process of information transfer from DNA to protein. For cellular efficiency, gene expression is often regulated early in the process of protein production.
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How do amino acids in DNA-binding proteins interact with DNA?
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By forming hydrogen bonds with DNA bases
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_______ genes ecode proteins that are used in metabolism or biosynthesis or that play a structural role in the cell.
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Structural
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_________ genes are genes whose products, either RNA or proteins, interact with other sequences and affect the transcription or translation of those sequences.
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Regulatory
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______ are DNA sequeces that are transcribed into RNA.
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Genes
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______ _______ are DNA sequences that are not transcibed but affect the expression of genes
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Regulatory genes
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_____ control incudes mechanisms that stimulate gene expression whereas ______ control inhibits gene expression.
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Positive; negative
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Regulation may be through the alteration of gene structure; this type of gene regulation is primarily in ______
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Eukaryotes
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