#Question id: 2073
#XL - S Microbiology
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
#XL - S Microbiology
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
#XL - S Microbiology
The force driving simple diffusion is:
#Question id: 2076
#XL - S Microbiology
An organism with a cell wall would most likely be unable to take in materials through:
#Question id: 2077
#XL - S Microbiology
In receptor-mediated endocytosis, receptor molecules initially project to the outside of the cell. Where do they end up after endocytosis?
#Question id: 2079
#XL - S Microbiology
According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly