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?

4, 1, 3, 2

Explanation:

Here is the complete 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, 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

First it gets to the capsule which is the outer covering, then to the membrane composed mostly of lipopolysaccharide, then to the peptidoglycan. Finally the membrane composed mostly of phospholipids

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