What characteristic do the nucleus, the mitochondria, and the vacuoles of animal cells have in common?
a. they all create energy while doing their tasks.
b. they all contain some of the cell's dna.
c. they are all enclosed by membranes made of phospholipids.
d. they are all involved in producing food for the cell.

How does the fermentation of pyruvic acid in cells contribute to the formation of atp? a. it completes the oxidation of glucose to co2, creating atp. b. it generates lactic acid, which cycles back through the krebs cycle, producing 2 atp molecules. c. it converts fadh2 to phosphate, which bonds with adp. d. it produces 2 nad+ molecules, which cycle back to fuel the glycolysis reaction, allowing 2 atp molecules to be produced.