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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- What molecule tags proteins for destruction by the proteasome? a. lysine b. ubiquitin c. oxaloacetate d. ferrodoxin e. ATParrow_forwardA. AG for the two reactions is different B. Trypsin is a protein, and elastase is not D. One of the reactions is endergonic, and the other is exergonic Hydrolysis of lysine bonds requires water; hydrolysis of alanine bonds des Part I: Microbiology 7. Which structures play direct roles in permitting bacteria to adhere to each other or to other surfaces? A. Cell wall and capsules B Capsule and fimbriae C. Cell membrane and endospores D. None 8. If E. coli lacks an F factor (F plasmid), and if bacteriophages are excluded from the bacterial cultures, then by which of these means Jilug some genes might be transmitted to other E. coli cells? A. via sex pili via transduction C. via conjugation D. via transformation both B and C 9. Broad-spectrum antibiotics inhibit the growth of most intestinal bacteria. A hospital patient who is Jas receiving broad-spectrum antibiotics is most likely to become A. unable to fix carbon dioxide B. unable to fix nitrogen deficient in certain vitamin K D. unable…arrow_forwardBeta-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_forward
- A 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_forwardWhich 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_forward
- 48. 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_forwardYou are working with an intracellular pathogen in cell culture. You add an agent that inhibits actin polymerization. What have you A. Inhibited the ability of the pathogen to hydrolyze ATP • B. Inhibited the ability of the pathogen to adhere to surfaces O C. Inhibited the movement of the pathogen into neighboring cells D. Inhibited the movement of the pathogen towards chemical attractants O E. Inhibited the ability of the pathogen to be detected by the host immune responsearrow_forwardWhat is the mechanism of action of the antimicrobial used to treat patients with Fungal infections * a. Inhibits ergosterol synthesis b. Inhibits glucan synthesis c. Inhibits protein synthesis d. Inhibits nucleic acid synthesisarrow_forward
- was 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_forwardThe wound response products that bind to digestive enzymes in herbivores are a. proteinase inhibitors. b. proteinase promoters. c. lipase inhibitors. d. lipase promoters.arrow_forwardWhich 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_forward