Strep throat how long after antibiotics feel better

Ohh this depends on what antibiotic you've been prescribed for me it usually takes 3 days on penicillin before I start feeling alot better.

Mitochondria produce atp, a high energy compound. atp is used for all sorts of enzyme-mediated reactions, such as making proteins/nucleotides/etc, certain compounds cross the cell membrane, muscles move, etc.  without this source of energy, a cell will die. it will not be able to repair itself, defend against pathogens, etc.