Tetracycline is called a broad-spectrum antibiotic because it is active against a wide variety of bacteria. how many asymmetric centers does tetracycline have?

It's problably four cause "tetra" is four

Sorry i dont understand the question can you rephase it?

You would be correct, boiling water does disinfect contamination.    the property of disinfecting means to kill  germs, bacteria and other pathogens or contamination  that might cause an infection or cause a person to become sickly. a couple methods of disinfecting are using soap, other cleaning supplies or by simply "boiling" the contaminate.  the reason why boiling water disinfects certain attributes is because some cells cannot survive the heat and pressure.