6. which process breaks energy-rich molecules down and releases energy-poor molecules?
which process uses energy-poor molecules to build an energy-rich one?

Hydrolysis process and ligation process

Explanation:

The process named hydrolysis helps in the breakdown of energy rich molecules to release energy poor moor molecules in presence of water

For example Adenosine tri phosphate (ATP) in presence of water undergo  hydrolysis to generate Adenosine di phosphate(ADP) and inorganic phosphate(Pi).

On the other hand ligation reaction helps in the synthesis of energy rich molecules by using energy poor molecules.

For example the reaction of ADP with inorganic phosphate(Pi) result in the formation of ATP a energy rich molecule.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.