Q. Which of the following is a Gram negative bacterium?
A) $Escherichia\ coli$
B) $Bacillus\ subtillis$
C) $Streptomyces\ coelicolor$
D) $Ampycolatopsis\ orientalis$
Explanation
The Gram stain is named after the developer Christian Gram. About 75% of known bacteria are Gram negative $e.g.,\ \ Salmonella,\ Pseudomonas,\ Vibrio,\ Helicobacter,\ Haemophilus,\ Escherichia.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.