The following two graphs show the same types of respirometric
experiments with two strains of bacteria (A and B). Based on this
graph, identify which strain is gram-negative. Briefly explain.
Figure 5: Graph showing the amount of 14CO2 release at the early
stage when glucose labeled on
carbon #1 (14C(1)), #3 (14C(3)) and #4 (14C(4) were used to feed
two different bacterial strains.
The Y-axis represents the amount of 14CO2 released.

Strain a Strain B “C(4) “C(O) “C(4) “C(3) / “C(3) c,.. Time Time





