Hon x Mindmap Cengage Lear x c ng cengage comstaticnbuiindex

Hon x Mindmap Cengage Lear x c ng cengage com/static/nb/ui/index.html?nbld 463568&nbNodeld; 162851707&elsBN; 9781305663787 a18parentld 162852278 MINDTAP Conceptual Learning Activity chapter 16 summary Due on Mar 26 at 11 pM cor Activity Information E. coli cells can be grown in a variety of liquid and solid media. Consider a broth that contains lactose and tryptophan but lacks glucose. We\'ll abbreviate this medium as +lactose, -glacose, +tryptophan. which of the following sets of proteins would an E. coli cell need to make for itself when cultured in the medium just described in bold? Check all that apply. Lactose utilization proteins Tryptophan biosynthesis enzymes The following rectangle is a simplified representation of the E. coli chromosome. Within the chromosome are the trp and lac operons. Each operon contains a cluster of genes. The genes within the trp operon encode proteins required for tryptophan biosynthesis. The genes within the lac operon encode proteins required for lactose breakdown. Determine which genes will be expressed when an E. coli cell is grown in this medium. lac operon (contains three genes) trp operon (contains five genes) be expressed. be expressed. These five genes Available in environment: +lactose, -glucose, +tryptophan in gene expression within this E. coli If glucose were added to the medium, you would expect to see

Solution

The cell would use \" LACTOSE UTILISATION PROTIENS\" as it needs to metabolise lactose ....

THE GENES OF LAC OPERON WILL BE EXPRESSED ( LIGHT BLUE BOX) ... because the cell is in lactose environment

If glucose is added to the medium ...simplly cAMP levels would go down ... CAP regulation is lost and cell would stop lac operon gene expression ... so we would expect to see decrease in gene expression

Hope it helps ... Regards