Cells in the body of a metazoan organism like yourself have many shapes and sizes that are suited to their particular functions. consider a muscle cell, which has the shape of a long cylinder. a cell in one of the tiny dorsal interosseous muscles of your hand is 13 mm long, with a radius of 10 μm. (a) what is its surface-to-volume ratio?

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.)

During dna replication,each strand of dna is used as a template to produce a complementary strand of dna. this process is shown below. which base will attach to location

Many birth-control pills release a constant amount of synthetic estradiols and progesterone for 21 days. true or false