The shape of hair is determined in part by the pattern of disulfide bonds in keratin, its major protein. from first to last, arrange the five steps needed to induce permanent curls in hair. first step last step last step answer bank keratin's a-helices convert to b-sheets. keratin's disulfide bonds break. physically curl the hair. apply an oxidizing agent. keratin's disulfide bonds reform to hold shape. apply a thiol-containing reagent and gentle heat. keratin's amino acids rearrange into the curled conformation.

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

The gulf stream is a warm water current that flows away from the equator to northern europe. witch of these does it cause. a. crashes of warm and cool water in the ocean b. colder climates near the equator c. large waves on the cost of europe d. warm climates in northern europe

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .