The is a fluid-filled region between the plasma membrane and the nucleus which contains

The fluid filled region between the plasma and nucleus is called cytoplasm. This region is a gel like substance and it contain all of the cell structure which is about water and the area that most cell function occur.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.