Students fractionating two proteins of unequal molecular weight noted that the proteins eluted from the sec column simultaneously. which of the following statements best explains this observation? (a) the shape of a molecule is unrelated to its rate of migration. (b) one of the proteins has a molecular weight beneath the exclusion limit. (c) the molecular weight of both proteins exceeds the exclusion limit. (d) both proteins possess equal charge at the buffered ph.

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.