question_answer 23)

  The most abundant chemical in living organisms could be (a) protein          (b) water                             (c) sugar                               (d) nucleic acid

Answer:

                  (b) There is abundance of water in living matter. It is the only polar molecule in livingorganisms, that can diffuse through a cell membrane without active transport. It is vitalfor a number of metabolic reactions and one of the raw materials for photosynthesis.