In what way are facilitated diffusion and active transport similar? Q1. Both occur in only one direction. Q2. Both move materials up a concentration gradient. Q3. Both require ATP. Q4. Both involve proteins in the cell membrane.

Exit what always affects measurement error in an experiment? a. investigator bias b. variability in nature c. instrument precision d. misreading the instrument

In which of the following relationships is one organism always benefited while the other organism is always harmed

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.