Choose two forces and compare and contrast these forces. provide two ways that they are similar and two ways that they are different.

My two forces are negative and positive energy.

Ways that they are similar: 1.They are both energy. 2. You need both of them to power electronics.

Ways that they are different: (I cannot think of any).

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.