On what basis are enzymes and proteins with allosteric properties different from those without allosteric properties? a) Allosteric enzymes have b) more than one substrate-binding site. c) different dependence on the substrate concentration. d) more than one subunit. e) different responses to nonsubstrate molecules such as inhibitors and activators.

The first element on the periodic table of elements is carbon. a. true b. false

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Uranium can supply energy for the worlds electricity without admitting harmful greenhouse gases which of these statements best describes an outcome of uranium mining