The transmission electron microscope is most useful for

1. looking at the surface features of a virus
2. seeing animal tissue that is visible to the naked eye
3. studying the structures of a live paramecium
4. viewing a cell’s mitochondria in detail

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.)

Donde se encuentra el adn nuclear en un organismo eucariota?

Several billion years ago which gas was the least prevailant in the atmosphere