he random motion of molecules within a cell is driven by energy from heat. a. At what temperature do most cells prefer to live? b. The calorie is a unit of energy defined as the amount of energy needed to raise 1 g of water by 1 C. A bacterium (which is mostly water) weighs about 1pg. Roughly, how many grams of sugar does a cell have to use to warm back up to its preferred temperature if it is suddenly placed in a cooler environment that lowers the cell's internal temperature by 5 C ? c. If the sugar used for energy is glucose (molecular mass =180.16 g/mol ), how many molecules are used? d. How much mass would be used as fuel to warm the cell if, instead of sugar, fatty acids served as the energy source?