When comparing the metabolism of glucose in bacterial and mammalian cells:

A.  Glycolysis is highly conserved; the citric acid cycle and oxidative phosphorylation differs in some bacteria compared with mammalian cells.

B.   Bacteria can only use glucose as an energy source whereas mammalian cells can use alternative energy sources.

C.   Bacteria only use glycolysis for the formation of ATP; they do not possess ATPase and do not use chemiosmosis.

D.   Bacteria do not respire, they only ferment.

(i)   Which response (A-D) is the best choice? (1 mark)

(ii)  Briefly explain your reasoning for your choice (2 marks)