Presence of the s-subunit permitted recognition of authentic RNA polymerase binding sites

TLS Online TPP Program

#Id: 2447

#Unit 3. Fundamental Processes

The enzymes DNA gyrase, which introduces negative supercoils into DNA, and DNA topoisomerase I, which removes negative supercoils in DNA, are required to prevent topological stresses from building up in the course of transcription and replication. 

TLS Online TPP Program

#Id: 6101

#Unit 3. Fundamental Processes

TLS Online TPP Program

#Id: 7750

#Unit 1. Molecules and their Interaction Relevant to Biology

The greater the effective nuclear charge the more tightly an electron is held in by the nucleus because there is less electron shield between the valence electrons and the nucleus, and so, the smaller the radius.

TLS Online TPP Program

#Id: 6833

#Unit 8. Inheritance Biology

Threshold characteristics display only two possible phenotypes—the trait is either present or absent.

TLS Online TPP Program

#Id: 596

#Unit 2. Cellular Organization

When DNA is extensively damaged (such as by UV light. RecA protein binds to this damaged, single-stranded DNA, activating the protein's coprotease activity. While bound to DNA, the RecA protein facilitates cleavage and inactivation of the Lex and Lambda repressor.