20. When Staphylococcus aureus becomes methicillin-resistant…

Question Answered step-by-step 20. When Staphylococcus aureus becomes methicillin-resistant… 20. When Staphylococcus aureus becomes methicillin-resistant (MRSA), which common resistance mechanism(s) is/are most common?a. Decreased uptake.b. Efflux pumps.c. Inactivation of the drug.d. Mutation of drug target.e. All of the (a., b., c. and d.) above are correct.21. Antibiotics are often found in nature because a. Biofilms protect microbes from competition.b. Enzymatic reactions are altered due to low temperature.c. Microbes require them to survive among their competitors.d. Resistance genes are passed among microbes.e. Both (a.) and (b.) above are correct.22. Some antibiotics are irreversible enzyme inhibitors and this means that they likelya. Degrade over time, becoming inactive.b. Form covalent bonds with the enzymes.c. Occupy the active site of enzyme for a long time.d. Can be pumped out of the microbial cell to reverse the effects.e. Only work to inhibit amphibolic reactions.  Biology Science Microbiology MBIOS 305 Share QuestionEmailCopy link Comments (0)