What does mRNA do?

A. Carries copies of instructions to make proteins from the DNA to the rest of the cell

B. Creates proteins on the
ribosome

C. Transfers amino acids to the ribosome during protein synthesis

D. Carries amino acids to the growing polypeptide chain on the ribosome

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.