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Class: BIOL - Biology 1 - Introduction; Subject: Biology / Biological Sciences; University: Washington & Jefferson College; Term: Forever 1989;
Typology: Quizzes
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DEFINITION 2 Serves all five genes, which together constitute a transcription unit TERM 3
DEFINITION 3 A single on/ off switch can control the whole cluster of functionally related genes, these genes are under coordinate control. TERM 4
DEFINITION 4 The promoter TERM 5
DEFINITION 5 The operator, the promoter, and the genes they control- the entire stretch of DNA required for enzyme production for the tryptophan pathway.
Binds to the operator and blocks attachment of RNA polymerase to the promoter, preventing the transcription of the genes. TERM 7
DEFINITION 7 A gene expressed at the beginning of the DNA chain, which is located some distance from the operon and controls and has its own promoter TERM 8
DEFINITION 8
DEFINITION 9 A small molecule that cooperates with a repressor protein to switch an operon off. TERM 10
DEFINITION 10 Transcription is ussually on but can be inhibited (repressed) when a specific small molecule (in this case tryptophan binds allosterically to a regulatory protein.
because the operons are switched off by the active form of the repressor protein. TERM 17
DEFINITION 17 Only when a regulatory protein interacts directly with the genome to switch transcription on. TERM 18
DEFINITION 18 E. coli preferentially uses glucose TERM 19
DEFINITION 19 Cyclic AMP (cAMP) which accumulates when glucose is scarce. TERM 20
DEFINITION 20 CAP
A protein that binds to DNA and stimulates the transcription of a gene.