1. Which set of terms best identifies the letters in the diagram below?

2. By which process is the stored energy of organic molecules transferred to a form of energy that is usable by cells?
1) digestion ) photosynthesis
2) aerobism ) respiration

3. Cells need ATP energy (“small bites”)
ATP made from food energy (respiration)
Food energy is from sun (photosynthesis)

4. The diagram represents part of a cellular process .
Energy is released and made available for metabolic activities at
1) step 1, only 3) both step 1 and step 2
2) step 2, only 4) neither step 1 nor step 2

5. CO2 + H2O + ATP Enzymes C6H12O6 + O2
Photosynthesis
CO2 + H2O + Sunlight Enzymes C6H12O O2
Cellular respiration
CO2 + H2O + ATP Enzymes C6H12O6 + O2