Operon Part 2 (7)

Front 1

Which of the following statements regarding CAP is TRUE?

Back 1

CAP requires cyclic AMP to bind DNA as a dimer.

Front 2

In the diagram below of the ara operon, what is the sugar composition of the media?

Back 2

In the diagram below of the ara operon, what is the sugar composition of the media?

Front 3

In Class II CAP-dependent promoters, it is possible to have CAP located at both the -41.5 and -61 positions.

Back 3

False

Front 4

Anti-activation can sometimes occur by an ADP-ribosylation-dependent mechanism. What is the mechanism regarding promoters regulated by catabolite repression?

Back 4

The CTD of the alpha subunit of RNA polymerase is modified by the addition of ADP-ribose moieties which block its’ interaction with CAP.

Front 5

In the diagram below of the lac operon, what is the sugar composition of the media?

Back 5

no glucose and no lactose

Front 6

In Class III CAP-dependent promoters, it is possible to have CAP located at both the -41.5 and -61 positions.

Back 6

True

Front 7

In the Cytr promoter (purine metabolism), the Cytr regulatory protein binds in between the two CAP dimers. This is an example of what type of regulation? (best answer)

Back 7

Anti-activation

Front 8

In E. coli, approximately _______ promoters are activated by CAP.

Back 8

100

Front 9

In which of the following E. coli promoters does CAP binding facilitate the formation of the Open Promoter Complex?

Back 9

Galactose (Gal P)