Use the information gathered in the Attenuation animation to answer the question. Prokaryotes commonly use attenuation as a mechanism to control gene expression, but eukaryotes do not. Why do you think that attenuation is more common in prokaryotes than eukaryotes? Only prokaryotes have RNA that can form hairpin structures. In eukaryotes, transcription and translation usually take place in separate physical locations. Only prokaryotes synthesize amino acids. Eukaryotic ribosomes are faster than prokaryotic ribosomes, making attenuation impossible. Eukaryotes only regulate gene expression at the level of chromatin structure.

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

What is turgor pressure, what causes it, and what does it do for a plant?