The predatory bacterium, Bdellovibrio bacteriophorus, drills into a prey bacterium and, once inside, digests it. In an attack upon a gram-negative bacterium that has a slimy cell covering, what is the correct sequence of structures penetrated by B. bacteriophorus on its way to the prey's cytoplasm?
1)membrane composed mostly of lipopolysaccharide
2)membrane composed mostly of phospholipids
3)peptidoglycan
4)capsule

Question

Quizplus · Accepted Answer

The correct sequence for Bdellovibrio bacteriovorus penetrating a gram-negative bacterium is: capsule (4), membrane composed mostly of lipopolysaccharide (1), peptidoglycan (3), and finally the inner membrane composed mostly of phospholipids (2). This sequence reflects the structure of a gram-negative bacterial cell wall from the outside in.

The Predatory Bacterium, Bdellovibrio Bacteriophorus, Drills into a Prey Bacterium