Cells build large complicated molecules, such as proteins. what do you think cells use as their "design plans" for proteins?

DNA. The DNA located within the nucleus contains the "blue print" for creating proteins. 

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.