Which of the following mechanisms of action of antibiotics has the fewest side effects? protein synthesis cell wall synthesis DNA replication synthesis of essential metabolites enzymatic activity
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Which of the following mechanisms of action of antibiotics has the fewest side effects?
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protein synthesis
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cell wall synthesis
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DNA replication -
synthesis of essential metabolites
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enzymatic activity
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- A pathogenic bacteria ferments for survival in your patient producing a swollen, dark discolored leg due to muscles degradation and gas-filled distension on the skin. Treatment includes pressurized hyperbaric oxygen. Which of the following apply? None of the statements apply Streptococcus pneumoniae causing community aquired pneumonia. Klebsiella pneumoniae causing cellular degradation in pulmonary tissues Clostridium perfringens causing gas gangrene resulting in myonecrosis by synthesis of acids and gases Staphylococcus aureus producing lipases and proteasesWhat is the mode of action of most antifungal drugs? inhibition of RNA synthesis disruption of membranes destruction of chitin inhibition of protein synthesis inhibition of folic acid precursor synthesisWhich drug among the following inhibits bacterial protein synthesis by attaching to the bacterial 305 ribosome? Cefixime Amoxicillin OErythromycin Doxycycline
- Which of the following drug classes is named according to its characteristic large chemical ring structure? Multiple Choice Penicillins Macrolide antibiotics Cephalosporins AminoglycosidesThe type of antimicrobial drug that would be most likely to have toxic effects in humans based on the premise of selective toxicity when treating microbial infection would be a drug that O 1) inhibits the synthesis of the cell wall O 2) inhibits metabolic pathways O 3) disrupts the cytoplasmic membrane 4) inhibits protein synthesis 5) All of the above have equal potential to be toxicWhich of the following is the site of action for penicillin? O Cell wall Cell membrane O Protein O DNA
- Which of the following is a true statement about the aminoglycosides? Multiple Choice They are a group of bacteriostatic antibiotics. Their antibacterial spectrum mainly includes gram-positive bacilli. They are active against anaerobic organisms. They cause irreversible inhibition of bacterial protein synthesis.Some bacteria produce the enzyme penicillinase, which breaks the beta-lactam ring in the penicillin molecule and converts it into penicilloic acid, which is harmless to bacteria. This is an example of which of the following mechanisms of antibiotic resistance? which option below is the answer? Destruction or inactivation of the antibiotic by the microbe Preventing penetration to the target site within the microbe Alteration of the drug’s target site(s) within the microbe None of the other four answers are correct Rapid ejection (pumping) of the drug out of the microbial cellTechnically speaking, which antimicrobial drugs are produced naturally? Biofilms Antibiotics Semisynthetics Synthetics
- Which antimicrobial agents have the narrowest spectrum of action? antivirals antifungals beta-lactams sulfanilamidesBottom of Form Penicillin is a narrow spectrum antibiotic because it only affects bacteria with mycolic acid in its cell wall, such as Mycobacterium tuberculosis. it only affects viruses it only affects Gram-negative organisms it only affects Gram-positive organismsBottom of Form Which of the following antibiotics might be destroyed by beta-lactamase enzymes? amphotericin B and ciprofloxacin streptomycin penicillin ciprofloxacinBottom of Form Which is incorrect about how the pharmaceutical industry has discovered drugs over the past 100 years? The process of discovery has involved custom-designing chemical compounds that we know will bind to target enzymes. The process of discovery has involved screening for chemicals that are toxic to bacteria while being less toxic to human cells. The process of discovery has involved screening thousands of randomly…Which one of the following statements regarding antibiotics is FALSE? It is a substance produced by microorganisms It is a substance produced totally by chemical synthesis It is a substance produced partially by chemical synthesis JEANETEN SEER E It is a substance produced by our immune system in response to a pathogen OIt kills or inhibits the growth of micro-organismsWhich of the following groups of antimicrobial drugs selectively targets bacterial cell wall synthesis? beta-lactams quinolones sulfonamides polymyxins phenols