Unformatted text preview: __T__ The Na/K ATPase uses ATP as an energy source to pump K into the cell and Na out of the cell, so that both ions form gradients across the membrane. __T__ Under physiological conditions, the glucose uniporter can lead to the export of glucose from some cells. __F__ All myosins are double headed (not all double) molecules that ‘walk’ on actin filaments, using ATP as an energy source. __T__ Microtubules are composed of thirteen protofilaments arranged to make a hollow tube. __F__ Microtubules undergo dynamic instability when the ATP (GTP) at the plus end is hydrolyzed to ADP. (GDP) __F__ A symporter would function as an antiporter if its orientation in the membrane were reversed (that is, if the portion of the protein normally exposed to the cytosol faced the outside of the cell instead). Total amount of detergent added to the solution [detergent] amount of detergent: in micelles free in solution...
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- Spring '07
- Adenosine triphosphate, Survey of Cell Biology, dynamic actin meshwork