If a species of Agrobacterium had a mutation in the virG gene that prevents VirG from becoming phosphorylated, would crown gall formation occur?

Figure 14.23 shows a genetic switch that controls the choice between the lytic and lysogenic cycles of phage ?. What is a genetic switch? Compare the roles of a genetic switch and a simple operator site (like the one found in the lac operon) in gene regulation.

Explain or illustrate exactly what will happen to the cell wall if thesynthesis of the interbridge is blocked by penicillin.

Choose the statement that best describes how proteins move between different compartments within the secretory and endocytic pathways. O A. proteins exit their primary location via translocators and are transported to their next destination by SRP B. proteins are directly translated into the cellular compartment that will serve as their final destination O C. proteins are packaged in vesicles that bud out of one membrane and fuse with the membrane at the next destination O D. proteins diffuse through the membrane where they originated and are bound by chaperones who transport them to their next destination

Which are the FIVE main series of apoproteins that have been identified?     "apoA, apoB, apoC, apoD, and apoE"     "apoA, apo(a), apoB, apoC and apoE"     "apoA, apoB, apoC, apo E, and apoL"     "apoB, apoC, apoD, apoE and apoM"

Researchers use a technique call RNA interference to knock down (i.e. not completely gone) the Bcl-2 gene in the amygdala of lab animals. What cellular response would you expect to occur?   Question 1 options:   A)  An increase in apoptosis; many cells in the area would die   B)  An increase in axon regrowth after injury   C)  A decrease in cytochrome c levels released from the mitochondria   D)  A decrease in glial cell infiltration after injury

In the 1860s, Louis Pasteur noticed that when headded O2 to a culture of yeast growing anaerobically onglucose, the rate of glucose consumption declined dra-matically. Explain the basis for this result, which is knownas the Pasteur effect.

What evidence is there that digestion of carbohydrates is occurring by activated yeast?

Transcription of structural genes in an inducible operon ______. A) starts when the pathway’s substrate is present B) occurs continuously in the cell C) starts when the pathway’s product is present

What are the two components that give their nameto the signal transduction system in prokaryotic cells?What is the function of each of the components?