Repressors bind to specific sites on the DNA. In bacterial cells, such binding sites, called operators

Regulation by means of a repressor protein that blocks transcription is referred to as negative regulation. Activators provide a molecular counterpoint to repressors; they bind to DNA and enhance the activity of RNA polymerase at a promoter; this is positive regulation.Repressor binding to DNA is regulated by a molecular signal called effector

TLS Online TPP Program

#Id: 3104

#Unit 3. Fundamental Processes

A plasmid is an autonomous circular DNA that constitutes a separate replicon.

TLS Online TPP Program

#Id: 3105

#Unit 3. Fundamental Processes

A replicated region appears as a bubble within nonreplicated DNA.

TLS Online TPP Program

#Id: 3107

#Unit 3. Fundamental Processes

A replication fork is initiated at the origin and then moves sequentially along DNA

TLS Online TPP Program

#Id: 3108

#Unit 3. Fundamental Processes

replication fork is initiated at the origin and then moves sequentially along DNA

TLS Online TPP Program

#Id: 3109

#Unit 3. Fundamental Processes

Replication is unidirectional when a single replication fork is created at an origin.

TLS Online TPP Program

#Id: 3110

#Unit 3. Fundamental Processes

Replication is bidirectional when an origin creates two replication forks that move in opposite directions.