Question $2(1$ point$)$

If a bacterial cell, say E$.$ coli, is found in an environment with oxygen and there is glucose around that the bacteria is using for energy, which of the following statements is true:

NAD will be converted from NADH by glycolysis

NAD will be converted from NADH by the TCA$/$Kreb$\text{'}$s cycle

NAD will be converted from NADH by fermentation

NAD will be converted from NADH by the electron transport chain