Transport of a compound across a cell membrane (down a concentration gradient) was measured at several concentrations.The presence or absence of ATP had no effect on the transport of this compound.Which best describes the mechanism of transport? 
A) facilitated diffusion
B) passive diffusion
C) primary active transport
D) secondary active transport
E) proton pumping
Correct Answer:
Verified
Q48: When a membrane reaches its transition temperature,
Q61: Exhibit 8A Q63: Passive transport is the same as: Q64: A useful method for studying membrane proteins Q68: Which of the following is not true? Q70: The key reaction of eyesight (in dim Q72: A major difficulty in extracting receptor proteins Q75: Glycoproteins on the cell surface are involved Q76: The mechanism of membrane transport may involve Q79: The difference between active transport and passive
A) simple
A)
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