If they are continuously dividing this means there is something wrong with them because normal cells don't do this. That means they have an error in their DNA. If it grows incessantly this error is being spread in the body when it shouldn't be, which can lead to subversive effects on the human body
Both glycolysis and Krebs cycle produce a net of 2 ATP each at the end of their cycles. Both cycles also produce reduced coenzymes for electron transport. They produce NADHs (the only difference is that Krebs produces 6NADHs while glysolysis produces 2NADHs).
It enables the body to store, transport and absorb fat soluble vitamins and minerals.