A researcher removes all of the mitochondria from a cell. This would likely result in the cells inability to use which of the following molecules A. The amino acid glycine
B. The nitrogenous base uracil
C. Oxygen
D. Carbon dioxide

I think it’s oxygen but I’m not sure.

C. Oxygen

Explanation:

Mitochondria are membrane-bound organelles found in the eukaryotic cells. They are regarded as the "power house" of a cell because of the vital role they play in the synthesis of energy needed to drive an organism's cellular activities. Their role in production of energy (in form of ATP) comes from the cellular respiration that occurs in them.

The kreb's cycle and oxidative phosphorylation of aerobic cellular respiration occurs in the mitochondria. As the name "aerobic" implies, oxygen is strictly involved in the process of respiration occuring in the mitochondria. Hence, if researcher removes all of the mitochondria from a cell, the cell will be unable to use OXYGEN, which is necessary for the cellular respiration in the mitochondria.