Choose the correct answer from the list below. Not all of the answers will be used.
-____________ is the principle carbohydrate in living systems.

A)obligate anaerobes
B)AMP
C)pyruvate
D)NAD⁺
E)glucose
F)UDP-glucose
G)GLUT5
H)facultative anaerobes
I)ATP
J)magnesium
K)galactokinase
L)GLUT2
M)galactose isomerase