Which aqueous solution of ki freezes at the lowest temperature?
(1) 1 mol of ki in 500. g of water
(2) 2 mol of ki in 500. g of water
(3) 1 mol of ki in 1000. g of water
(4) 2 mol of ki in 1000. g of water

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products