Exam 7: Metabolic Regulation

Explain the sequence of events that would follow the transfer of an organism from a complex medium to a minimal medium.

The actual residues in a DNA-binding protein that interacts with DNA usually correspond to each other according to the amino acids encoded by the DNA.For example,a DNA sequencing containing AGC-AGA-CAG which encodes for Ser-Arg-Gln would likely have a DNA-binding protein with Ser-Arg-Gln bind to it.

Explain why one cell of a pathogenic bacterium by itself typically does not secrete a toxin,despite the species as a whole being characterized as toxin producing.To help in your explanation,predict what would happen to an individual pathogen that secreted a toxin inside a human.

Studying the transcriptional activity of flagellar genes would not likely reveal differential changes when the cells are actively motile compared to nonmotile activity,because a two-component regulatory system is sufficient to control flagellar activity.

Which organism would likely harbor the MOST two-component regulatory systems?

Explain why cellular cannibalism is beneficial for sporulating Bacillus subtilis.

Considering the catabolite repression mechanism,which observation would make you suspect it is NOT occurring?

Multiple sigma factors are essential to induce the biosynthesis of endospores,all of which are encoded by genes,so a complex regulatory mechanism such as this likely has a higher chance of mutations leading to incorrect functioning compared to a simple repression mechanism.

Explain the translational attenuation mechanism.

Describe the function and the functional components of the maltose regulon system.

A regulon always includes at least two operons.