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Exam #1
Chapters 13, 14, 15 , 16
16
Biology
11th Grade
02/16/2013

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Term
gene expression
Definition
the process by which the information within a gene is made into a functional product, such as a protein or RNA molecule
Term
gene regulation
Definition
the ability of cells to control the expression of their genes
Term
constitutive genes
Definition
genes with relatively constant levels of expression in all conditions over time
Term
cell differentiation
Definition
the process by which cells become specialized into particular types
Term
genome
Definition
the complete genetic composition of a cell or a species
Term
proteome
Definition
the complete complement of proteins that a cell or organism can make
Term
regulatory transcription factor
Definition
a protein that bind to DNA in the vicinity of a promoter and affects the rate of transcription of one or more genes
Term
repressor
Definition
a transcription factor that binds to DNA and inhibits transcription
Term
activation
Definition
a transcription factor that binds to DNA and increases the rate of transcription
Term
negative control
Definition
transcriptional regulation by activator proteins
Term
positive control
Definition
transcriptional regulation by activator proteins
Term
small effector molecule
Definition
with regard to transcription, refers to a molecule that exerts it's effects by binding to a regulatory transcription factor, causing a conformational change in the protein
Term
domain
Definition
a defined region of a protein with a distinct structure and function
Term
operator
Definition
a DNA sequence in bacteria that is recognized by activator or repressor proteins that regulate the level of gene transcription
Term
operon
Definition
an arrangement of two or more genes in bacteria that are under the transcriptional control of a single promotor
Term
polycistronic mRNA
Definition
an mRNA that contains the coding sequences for two or more structural genes
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