Plz help asap! What is the best explanation of how the fluid mosaic model helps explain the selective permeability of cell membranes? Cholesterol embedded in the phospholipid bilayer allows passage of certain molecules.
The phospholipids are flexible and can slide past one another, allowing small gaps that molecules can penetrate.
The phospholipid bilayer allows osmosis while preventing diffusion of H2O molecules.
The phospholipid bilayer provides the cell's protection, while embedded proteins allow passage of some molecules.

The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

Emmet didn’t want to weed the garden. he put off the task toward the end of the day. he even tried to get his sister to do the job. what type of goal orientation did emmet display toward weeding the garden?

Approximately what portion of the foods that we eat have been genetically modified in some way? a.fewer than 10% b.about 50% c.nearly 100%