In systemic tissue fluids, the enzyme carbonic anhydrase catalyzes the reaction co2 + h2o → h2co3 (which then can dissociate into h+ and in fact, co2 released from cells is converted to hco3- ions and travels in that form in the bloodstream. hco3- is reconverted to co2 + h2o in the pulmonary capillaries by the same enzyme, and there the co2 is exhaled. how is it possible for the same enzyme to catalyze reverse reactions?
a. there must be two forms of carbonic anhydrase. one form catalyzes the forward reaction co2 + h2o → h2co3 and the other catalyzes the reverse reaction h2co3 → co2 + h2o
b. the direction of a reversible reaction is influenced by the concentrations of reactants and products. in pulmonary circulation, the low co2 concentration favors the formation of co2 and h2o
c. the lungs contain an allosteric inhibitor that prevents the formation of carbonic acid

B. the direction of a reversible reaction is influenced by the concentrations of reactants and products. In pulmonary circulation, the low CO2 concentration favors the formation of CO2 and H2O

well, you see. the answer to your question is quite simple. the thing that is big, powerful, and over 9,000 is your mom.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."