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c.Organelle membranes are not composed of a phospholipid bilayer.

b.Organelle membranes have a different signature of proteins floating in the bilayer.

a.Organelle membranes are not semipermeable.

How does the cell membrane on the exterior of the cell differ from the membranes that envelope organelles inside the cell? The cell membrane is formed of phospholipids and proteins only. It can be said that some proteins in the cell membrane are like 'icebergs floating in a sea of lipids.' These embedded proteins that span the whole width of the membrane and “poke out” on the inside and the outside are called

d.The proteins in the cell membranes were moving around as if in a fluid mosaic.

c.The fused cells grew and reproduced pink cells.

b.Human cell membranes did not hold the dye as well.

a.Cell membranes from mice were very different than those in human cells.

When scientists at Johns Hopkins University fused human cells with mouse cells that had been dyed blue and red respectively, they made an important breakthrough regarding cell membranes.

d.Sometimes the membrane will mistake water molecules for lipids.

c.The membrane is fallible and sometimes water leaks through.

The water that is inside a cell stays in it throughout its life.

b.Water molecules cannot pass through the membrane.

a.Channels called aquaporins in the membrane allow water molecules to pass through freely.

The membrane itself is hydrophobic in the inner layers and doesn't allow water-soluble molecules to pass, yet water itself can permeate cells.

d.Phospholipid molecules that self-arrange head-to-head.

c.Phospholipid molecules that self-arrange tail-to-tail.

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