Solved by a verified expert:27. In a metabolic pathway, a typical control mechanism is to have ________A.the final product inhibit the enzyme responsible for its on productionB.the final product inhibit an early stepC.a reactant inhibit a late stepD.a lack of reactant stimulate the pathway28. The most important aspect of cellular respiration is that ___________________A.It is the process that occurs only in animal cellsB.It is the process that utilizes fat as its primary energy sourceC.It is the process that enables living organisms to utilize the energy stored in glucoseD.It is the only cellular process that yields ATP29. The statement best describes the relationship between plants and animals on earth isA.Plants produce O2 and sugars from CO2B.Animals produce CO2 and H2O from sugars and O2C.Plants produce O2 and sugars and animals produce CO2 and H2OD.Animals produce O2 and sugars and plants produce CO2 and H2O