Introduction:
Drugs that are used to treat the microbial infections are commonly referred to as antimicrobial agents. Antimicrobial agents differ in their mode of action, including the inhibitions of cell wall, protein and
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- Beta-lactam antibiotics work by? O A. cleaving peptide side chains O B. preventing cross-linking of the peptide side chains by transpeptidase O C. cleaving the 1,4 beta-glycosidic bond between the NAM and NAG © D. inhibiting the action of bactoprenol O E. preventing peptidoglycan from being flipped to the external side of the plasma membranearrow_forwardA methyltransferase enzyme capable of methylating ribosomes and changing their structure might protect against (choose all that apply) A. chloramphenicol B. penicillin C. polymyxin B D. bacitracin E. tetracyclinearrow_forwardMatch each antibacterial drug with its primary target. Chloramphenico✓ Choose... Nucleic acid synthesis Fluoroquinolone Cell membrane Cell wall Tetracycline Metabolic pathway Translation Rifampin Aminoglycosides Choose... Macrolide Choose... Penicillin Choose... Sulfonamides Choose... Cephalosporin Choose... Vancomycin Choose... Polymyxin Choose... → ( 4 ( ( ( (arrow_forward
- Which of the following pairs is mismatched? a. catalase: hydrogen peroxide production b. bactericidal permeability-increasing protein: binds LPS and kills Gram-negative bacteria c. elastase: basement membrane degradation d. NADPH oxidase: superoxide radical production e. gelatinase: iron sequestration f. paracrine: acts on neighboring cells.arrow_forwardcharge Some bacterial pathogenic strains have the ability to evade the action of antibiotics. How? What could be some of the possible ways? molecu does. https://ma Турes (Select those that apply) Select one or more: People a. Bacteria is always susceptible to antibiotics and are always killed by antibiotics! Can water b. Bacteria can regulate its gene expression to produce an impermeable lipid membrane to evade antibiotics." Does a cov c. Bacteria produces a special reverse transcriptase that aids bacteria to evade Is water a n antibiotic stress. What would d. Bacteria can produce enzymes that can chemically deactivate some antibiotics. e. Bacteria can regulate its gene expression to activate certain efflux pumps to evade V antibiotics. https://sciencing What Happ Mar 13, 2018 - These molecules ( Previous page Next page https://bio.libretext 2.2A: Water's 742 MacBook Pro Q esc ! @ # $ % & 1 2 3 4 Q W E R Y tab A S D F G caps lock COarrow_forward48. The arrow points to a Listeria monocytogenes cell moving within the cytoplasm of an intestinal cell. How is this motility facilitated? A. Flagella B. Axial filament C. Host cell actin D. Pili E. Fimbriaearrow_forward
- Each of the following statements concerning penicillin is correct EXCEPT: a. Penicillin is a bacteriostatic drug because autolytic enzymes are not activated. b. Penicillin inhibits transpeptidases, which are required for cross-linking peptidoglycan. C. The structure of penicillin resembles that of a dipeptide of alanine, which is a component of peptidoglycan. D. An intact β-lactam ring of penicillin is required for its activity.arrow_forwardwas used by Joseph Lister to clean wounds and surgical instruments: A.Antibiotics b.Chlorine water Carbonic acid dAntitoxins e. Carbolic acid Which one of the following does not apply to the bacterial glycocalyx? It is not responsible for virulency b .It allows the organism to resist drying C. It may allow an organism to resist phagocytosis d.It is composed of carbohydrates E. It is enclosed by the cell wallarrow_forwardCan you explain it?arrow_forward
- Which of the following is MOST likely the reason why prions are infective? A. Prions are small proteins that can easily bind to allosteric sites of other proteins causing steric and electrostatic repulsions that affect protein structure. B. Prions mediate protein folding C. Prions have exposed hydrophobic cores capable of interacting with non-polar groups in proteins which it also alters for maximum interactions. D. Prions increase thermodynamic instability of external residues by disrupting H2O-protein interactions E. Prions are small proteins that inhibits folding of proteins to its proper conformationarrow_forward1_Vancomycin inhibits cell wall synthesis by: a.Binding irreversibly to transpeptidase and inhibit cross linking the peptidoglycan chains b.Acting on the final stage of peptidoglycan assembly c.Acting on the enzyme that assembles a growing glycan chain d.Interfering with one of the early stages of synthesis of peptidoglycan Please answer asap and type your answer and do not copy from anywhere please answer should not be palgarisedarrow_forwardUV light is able to damage bacterial cells by:a. preventing mitosis b. damaging DNA c. dissolving cell membranes d. coagulating cytoplasmarrow_forward