Question

plzzz help with my homework

Answer 1

1:When a plant or an animal cell requires energy..the glucose molecules are broken down to release energy through cellular respiration.

Answer 2

Mitochondria are miniature factories where food stuffs or respiratory substrates are completely oxidised to carbon dioxide and water. The energy liberated in the process is initially stored in the form of reduced coenzymes and reduced prosthetic groups. The latter soon undergo Oxidation and form energy rich ATP. ATP comes out of mitochondria and helps perform various energy requiring processes of the cell like muscle contraction, nerve impulse conduction, biosynthesis, membrane transport, cell division, movement, etc.
Because of the formation of ATP, you know, they are called power houses of the cell.

It is a "little into detail" answer. Should be helpful.....