This structure is a double-walled membrane which allows materials into and out of the nucleoplasm:

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

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.

Due tonight 10 points will mark brain