Animals obtain energy through a series of chemical reactions in with sugar and oxygen gas are reactants this process produces wa
ter and carbon dioxide as waste products how might you use a radioactive isotope to find out whether the oxygen in CO2 comes from the sugar or from oxygen gas
In order to find out whether the oxygen in CO2 comes from the sugar or from oxygen gas, we will perform radioactive labeling one by one on oxygen of sugar and oxygen of gas.
After this, we will observe the results and find that labelling of oxygen done in case of sugar produces radio labelled CO2 whereas labelling done in atoms of oxygen gas did not give a radio labelled CO2.
From this, it is concluded that in the process of cellular respiration ( oxidation of sugar to give energy in the form of ATP while producing water and CO2 as waste products), CO2 comes from the sugar molecule and not from oxygen gas.
It allows things to go in and out of the cell. Plants have rigid cell walls which makes it harder for things to go in and out if the cell. Animal cells are softer so they can diffuse substances easier
