Consider this situation. You have a white mutant that you plated on YED and on MV agar. After a few days, it grows into a small colony on YED agar but not much growth on MV agar. What is the most likely explanation?
a. The mutation affects the ability to metabolize glucose.
b. The mutation affects the production of a pigment.
c. The mutation affects the cell wall structure.
d. The mutation affects the expression of nitrogenase enzyme.