How do the structures of plants support their roles in food production and reproduction?

What is the name for a substance formed in a chemical reaction

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.

Which is the following can combine in a cell to convert a lower-energy molecule into a higher-energy molecule?