Question.262 - Question 1 2?/ 2?pts How does ATP release energy that can be used by living cells? ?? By being exposed to body heat ? ?? By being exposed to sunlight ? ?? By adding more phosphate groups to itself ? ?? By breaking a bond within an ATP molecule ? ? Question 2 2?/ 2?pts Which equation is balanced (showing that atoms are not created or destroyed in a chemical reaction)?? ? ?? O2 + C6H12O6 --> CO2 + H2O ? ?? 6O2 + 6C6H12O6 --> 6CO2 + 6H2O ? ?? 2O2 + 2C6H12O6 --> 2CO2 + 2H2O ? ?? 6O2 + C6H12O6 --> 6CO2 + 6H2O ? If you have a certain number of one kind of atom going into a chemical reaction, you need to have that same number of that atom coming out of the reaction. Notice that I said ATOMS not molecules. In a chemical reaction, bonds are broken and new bonds are formed.? I will not ask you to balance equations. You should have had this practice in high school chemistry class. You do need to be able to recognize that atoms are not created or destroyed.? ? Question 3 2?/ 2?pts What are the main by-products of cellular respiration? ?? Sugars and water ? ?? Carbon dioxide and oxygen ? ?? Oxygen and sugars ? ?? Water and carbon dioxide ? ? Question 4 2?/ 2?pts ATP molecules are charged during cellular respiration; where does the energy to charge the ATPs comes from? ?? The energy comes from the building of carbon dioxide. ? ?? The energy comes from the breaking of oxygen. ? ?? The energy comes from the breaking of chemical bonds within glucose. ? ?? The energy comes from the water. ? ? Question 5 2?/ 2?pts Can energy be harvested by the cells from glucose without oxygen? ?? Yes, but not quite as much as with oxygen. ? ?? Yes, but much less than with oxygen. ? ?? No, oxygen is required to harvest any energy from glucose. ? ?? Yes, about as much as with oxygen. ?

Answer Below: