Two cells with different cell-surface markers are fused in the presence of polye

Question

Two cells with different cell-surface markers are fused in the presence of polyethylene glycol (PEG). The cells are then placed at 0°C. What do you expect to observe about the individual cell markers?

A) The markers will evenly disperse throughout both membranes.
B) Only one marker will disperse while the other remains stationary.
C) Both sets of markers will not mix, but will migrate to opposite poles from one another.
D) The markers will essentially remain where they are, with little migration.
E) The markers will be endocytosed by the fused cell and then redistributed as fused markers.



A prokaryotic organism is isolated from a glacier, where it has been observed to be thriving. Based on your knowledge of the plasma membrane, you would expect to find a predominance of

A) largely saturated fatty acids.
B) equal amounts of saturated and unsaturated fatty acids, as long as the chain was close to 12 carbons in length.
C) cell wall to define the cell, as the cell membrane would not be present.
D) largely unsaturated fatty acids.
E) none of the above

A prokaryotic organism is isolated from a hydrothermal vent, where it has been observed to be thriving. Based on your knowledge of the plasma membrane, you would expect to find a predominance of

A) largely saturated fatty acids.
B) equal amounts of saturated and unsaturated fatty acids, as long as the chain was close to 12 carbons in length.
C) polar fatty acids.
D) largely unsaturated fatty acids.
E) none of the above

Explanation / Answer

1.      Two cells with different cell-surface markers are fused in the presence of polyethylene glycol (PEG). The cells are then placed at 0

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