A disinfectant is a substance that does what?
It destroys the DNA of bacteria and virus (micro organisms)
A disinfectant is a substance, such as Lysol or alcohol that you put on surfaces like countertops or toilet seats to kill germs and other microbes. An antisceptic is used to kill germs and microorganisms, typically used on the skin and to clean out wounds. Hydrogen Peroxide or iodine are good examples.
Bleach is not an antibiotic, but it can and does kill bacteria. Antibiotics are drugs used to fight infections in humans and animals. The word for substances such as bleach that are used to kill bacteria outside of a living thing is an "antibacterial" substance, or antiseptic, or disinfectant. Bleach, even in dilute form, is a disinfectant for water, aqueous solutions, and on many environmental surfaces.
Your results might be different then these but I hope this will give you an idea for an answer a. In our lab we observed growth in all of the test tubes. Originally we had hypothesized that the tubes with higher concentrations of disinfectant would inhibit the growth of the inoculated organism. This experiment allows us to conclude that the disinfectant is not very efficient. Although we were able to come to a conclusion, our…