Answer:
A. ATP
B. ATP
C. ATP
D. ADP + Pi
Step-by-step explanation:
A. An anabolic reaction is a metabolic reaction where small molecules are joined together to form larger ones. This uses energy therefore ATP is needed.
B. Energy is stored in the chemical bonds of ATP, when this energy is needed breaking of these bonds creates energy cells can use.
C. An energy-requiring reaction is an energetically unfavorable reaction therefore an energetically favorable reaction is coupled with it such as ATP hydrolysis.
D. Hydrolysis of ATP is a catabolic reaction that breaks the high-energy bonds in ATP to release energy. This reaction forms the products of ADP + Pi.