Answer:
A. Adenosine triphosphate
Explanation:
Molecule "a" shows the structure of ATP which stands for Adenosine triphosphate. ATP provides the energy that cells need to conduct the different processes within it.
Adenosine is made up adenine and ribose, which is attached to 3 phosphate groups, which you see there as the three circles with a P in it. These phosphate groups hold oxygen in them and they hold a lot of potential energy because of their negative charges.
<em>NOTE: If you take out one of these phosphate groups, you'll get the structure of molecule 'b'. So instead of "tri" which means three, you'll have a diphosphate because 2 will be left. </em>
Attached you'll see a labeled ATP molecule.
