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28 Cards in this Set

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activator protein
a regulatory protein that binds to specific sits on DNA and stimulates transcription, involved in positive control.
Allosteric enzyme
an enzyme that contains two binding sites, the active site (where the substrate binds) and the allosteric site (where an effector molecule binds)
Negative control
a mechanism for regulating gene expression in which a repressor protein functions to prevent transcription of a gene or genes.
Operon
one or more genes transcribed into a single RNA and under the control of a single regulatory site.
Positive control
a mechanism for regulating gene expression in which an activator protein functions to promote transcription of a gene or genes.
Quorum sensing
a regulatory system in an organims that requires a certain density of cells of the same species be present before the regulatory events occur.
Repressor protein
a regulatory protein that binds to specific sites on DNA and blocks transcription; involved in negative control
activator protein
a regulatory protein that binds to specific sits on DNA and stimulates transcription, involved in positive control.
Allosteric enzyme
an enzyme that contains two binding sites, the active site (where the substrate binds) and the allosteric site (where an effector molecule binds)
Negative control
a mechanism for regulating gene expression in which a repressor protein functions to prevent transcription of a gene or genes.
Operon
one or more genes transcribed into a single RNA and under the control of a single regulatory site.
Positive control
a mechanism for regulating gene expression in which an activator protein functions to promote transcription of a gene or genes.
Quorum sensing
a regulatory system in an organims that requires a certain density of cells of the same species be present before the regulatory events occur.
Repressor protein
a regulatory protein that binds to specific sites on DNA and blocks transcription; involved in negative control
Bacteriophage
a virus that infects prokaryotic cells
lysogen
a bacterium containing a prophase
lysogenic pathway
a series of steps that, after virus infection, lead to a state (lysogeny) where the viral genome is replicated as a prophage along with that of the host
Lytic pathway
a series of steps after virus infection that leads to virus replication and the destruction (lysis) of the host cell
Plaque
a zone of lysis or cell inhibition caused by virus infection of a law of sensitive cells
Plus (positive)-strand virus
a virus with an RNA or DNA genome in which the genome has the same complementarity as the mRNA of the virus
Prion
an infectious protein whose extracellular form contains no nucleic acid
Provirus (prophage)
the genome of a temperate virus when it is replicating with, and usually integrated into, the host chromosome.
Retrovirus
a virus whose RNA genome has a DNA intermediate as part of its replication cycle
Reverse transcription
the process by copying information found in RNA into DNA by the enzyme reverse transcriptase
Virion
the complete virus particle; the nucleic acid surrounded by a protein coat and in some cases other material
Virus
a genetic element containing either RNA or DNA that replicates in cells but is characterized by having an extracellular state
Temperate virus
a virus whose genome is able to replicate along with that of its host and not cause cell death in a state called lysogeny
Viroid
small, circular, single-stranded RNA tha causes various plant diseases.