A nurse is reviewing the mechanisms of action of different antimicrobial agents. The nurse understands that antibiotics that inhibit cell wall synthesis are most effective against which type of bacteria?
Gram-positive bacteria
Gram-negative bacteria
Anaerobic bacteria
Atypical bacteria.
The Correct Answer is A
This is because antibiotics that inhibit cell wall synthesis are most effective against bacteria that have a thick peptidoglycan layer in their cell wall, which is characteristic of gram-positive bacteria. Peptidoglycan is a polymer of glycan and peptides that gives the cell wall its strength and rigidity. Antibiotics that inhibit cell wall synthesis, such as β-lactams and glycopeptides, prevent the formation or cross-linking of the peptidoglycan layer, resulting in cell wall defects and bacterial lysis.
Choice B is wrong because Gram-negative bacteria is wrong because gram-negative bacteria have a thin peptidoglycan layer and an outer membrane that protects them from antibiotics that target cell wall synthesis. Some gram-negative bacteria also have efflux pumps or β-lactamases that can expel or degrade these antibiotics.
Choice C is wrong because Anaerobic bacteria is wrong because anaerobic bacteria can be either gram-positive or gram-negative, and their susceptibility to antibiotics that inhibit cell wall synthesis depends on their cell wall structure and resistance mechanisms.
Choice D is wrong because Atypical bacteria is wrong because atypical bacteria are bacteria that lack a cell wall, such as Mycoplasma and Chlamydia. These bacteria are naturally resistant to antibiotics that inhibit cell wall synthesis, as they do not have a peptidoglycan layer to target.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
This means that less of the drug will get into your bloodstream and it may not work as well to treat your infection.According to one source, dairy products can reduce the bioavailability of ciprofloxacin by 30 to 36 percent and the peak concentration by 36 percent.
Choice A is wrong because dairy products do not increase the risk of kidney stones with this medication.
There is no evidence to support this claim.
Choice C is wrong because dairy products do not cause allergic reactions with this medication.
Allergic reactions are possible with any medication, but they are not related to dairy products.
Choice D is wrong because dairy products do not interfere with the metabolism of this medication in your liver.
Ciprofloxacin is mainly eliminated by the kidneys, not the liver.
To avoid this interaction, you should take ciprofloxacin at least 2 hours before or 6 hours after dairy products.
Correct Answer is A
Explanation
This is because antibiotics that inhibit cell wall synthesis are most effective against bacteria that have a thick peptidoglycan layer in their cell wall, which is characteristic of gram-positive bacteria.Peptidoglycan is a polymer of glycan and peptides that gives the cell wall its strength and rigidity.Antibiotics that inhibit cell wall synthesis, such as β-lactams and glycopeptides, prevent the formation or cross-linking of the peptidoglycan layer, resulting in cell wall defects and bacterial lysis.
Choice B is wrong becauseGram-negative bacteria is wrong because gram-negative bacteria have a thin peptidoglycan layer and an outer membrane that protects them from antibiotics that target cell wall synthesis.Some gram-negative bacteria also have efflux pumps or β-lactamases that can expel or degrade these antibiotics.
Choice C is wrong becauseAnaerobic bacteria is wrong because anaerobic bacteria can be either gram-positive or gram-negative, and their susceptibility to antibiotics that inhibit cell wall synthesis depends on their cell wall structure and resistance mechanisms.
Choice D is wrong becauseAtypical bacteria is wrong because atypical bacteria are bacteria that lack a cell wall, such as Mycoplasma and Chlamydia.These bacteria are naturally resistant to antibiotics that inhibit cell wall synthesis, as they do not have a peptidoglycan layer to target.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.