The predatory bacterium, Bdellovibrio bacteriophorus, drills into a prey bacteri

Question

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 which can inhibit phagocytosis, 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 A) 4 ?? 3 ?? 1 ?? 2 B) 1 ?? 4 ?? 3 ?? 2 C) 2 ?? 4 ?? 3 ??1 D) 4 ?? 1 ?? 3 ?? 2 E) 1 ?? 3 ?? 4 ?? 2

Explanation / Answer

Answer= D Follow attack from outside in based on anatomy. Capsule, LPS layer, peptidoglycan cell wall, phospholipid layer http://ars.els-cdn.com/content/image/1-s2.0-S0377840111004937-gr1.jpg

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