(3pts) Protein A contains 2 polypeptide chains (1 of 70,000, 1 of 55,000) held together by disulfide bonds. Protein B contains 2 polypeptide chains (each 75,000 and 27,000) held together by hydrophobic interactions and electrostatic forces. On the SDS-PAGE gel to the right, sketch the ideal pattern you expect for each of these proteins in the absence and presence of reducing agents

Forensic anthropologists: a. apply anthropological techniques to legal matters. b. are primarily concerned with the recovery of material culture remains. c. examine the relationships between medical treatment and culturally determined views of disease. d. study disease and trauma in ancient populations. e. study nonhuman primates.

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine