Term
| function of beta-galactosidase |
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Definition
| converts lactose to glucose and galactose to be utilized as nutrients |
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Term
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Definition
| DNA sequence that binds the repressor protein |
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Term
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Definition
| relieves the negative effect of repressor on transcription (is a de-repressor) by causing repressor to lose its affinity for the operator sequence |
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Term
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Definition
| lacZ (galactosidase), lacY (permease), lacY (transacetylase). It is an inducible gene (in uninduced gene it is actively repressed) |
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Term
| catabolite repression in lac operon |
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Definition
| a feedback mechanism where little to no transcription occurs in presence of glucose whether lactose is present or not |
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Term
| what are the two requirements for transcription at lac operon? |
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Definition
| absence of repressor and presence of activator |
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Term
| what happens to lac operon in presence of lactose and absence of glucose? |
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Definition
| cAMP-CRP binds to a promoter proximal site and efficiently attracts RNA polymerase to the promoter, leading to relief of catabolite repression and promotion of active transcription |
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Term
| relationship between levels of cyclic AMP (cAMP) and glucose |
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Definition
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Term
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Definition
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