I picture a Pro riding a cycle.
Protein formation happens in the ribosomes
Tetracyclines block ribosomes
Ribosomes make proteins
Tetracyclines end in -cycline
Tetracyclines are bacteriostatic
Tetracyclines treat gram positive and gram negative
Tetracyclines block protein formation I imagine a Pro riding a motorcycle. 
I imagine a Pro riding a motorcycle. Protein associated with ribosomes
I imagine a Pro riding a motorcycle.
Picture a cycle sitting in traffic remaining static