The two parts of cellular respiration which must occur twice for each glucose molecule that enters the process are

the citric acid cycle and preparatory steps

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can