28. The structure of a protein that contains only peptide bonds is the protein's ------ structure primary secondary O tertiary O no correct response

A hydrocarbon (Alkene) is used as a monomer to prepare a chain- growth polymer with molecular weight of 42000 g/gmole. If the degree of polymerization is 1000, :the polymer type is Polypropylene Polystyrene O High density polyethylene Low density polyethylene

The presence of aromatic groups in a polymer chain results ina) intermolecular attractionb) potential for crosslinkingc) increase in Tg and Tmd) tensile strength becomes maximum.

Food storage containers are rigid.As a result, they can keep their shape to hold food.When food storage containers are heated in a microwave oven, they become more flexible.Why? There is an increase in molecular motion and the intermolecular force of attraction between polymers weakens. The polymer chains decrease in length  There is more cross-linking between the monomers The polymers break down into monomers