Question

What do all cellular activities in living organisms use as a source of energy? a. ATP b. lactic acid c. pyruvic acid d. glucose

Answer 1

All cellular activities in living organisms use
A. ATP 

Answer 2

Answer;

-ATP

Explanation;

-ATP is the main source of energy for most cellular processes. The building blocks of ATP are carbon, nitrogen, hydrogen, oxygen, and phosphorus. Because of the presence of unstable, high-energy bonds in ATP, it is readily hydrolyzed in reactions to release a large amount of energy.

-The enzymatic removal of a phosphate group from ATP to form ADP releases a huge amount of energy which is used by the cell in several metabolic processes as well as in the synthesis of macromolecules such as proteins. The removal of a second phosphate group from ATP results in further energy release and the formation of adenosine monophosphate (AMP).