#Question id: 2072
#Unit 2. Cellular Organization
Which of the following structures would decrease the electrochemical gradient across a membrane?
#Question id: 2073
#Unit 2. Cellular Organization
The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of:
#Question id: 2074
#Unit 2. Cellular Organization
In some cells, there are many ion electrochemical gradients across the plasma membrane even though there are usually only one or two proton pumps present in the membrane. The gradients of the other ions are most likely accounted for by:
#Question id: 2075
#Unit 2. Cellular Organization
The force driving simple diffusion is:
#Question id: 2076
#Unit 2. Cellular Organization
An organism with a cell wall would most likely be unable to take in materials through:
#Question id: 2077
#Unit 2. Cellular Organization
In receptor-mediated endocytosis, receptor molecules initially project to the outside of the cell. Where do they end up after endocytosis?