Which of the following bacteria requires nicotinic acid as a growth factor in their media?
A. Proteus vulgaris
B. Nitrosomonas sp.
C. E. coli
D. Leuconostoc mesenteroides
Answer:A
Which of the following bacteria requires nicotinic acid as a growth factor in their media?
A. Proteus vulgaris B. Nitrosomonas sp. C. E. coli D. Leuconostoc mesenteroides