The most selectively toxic antibacterial agents are those that interfere with bacterial cell wall synthesis. This is because ________. Group of answer choices bacterial cell wall synthesis is easily inhibited whereas eukaryotic cell wall synthesis is more resistant to the actions of the drugs bacterial cell walls have a unique structure not found in eukaryotic host cells eukaryotic cells do not take up the drugs eukaryotic cells inactivate the drugs before they can do any damage

The most selectively toxic antibacterial agents are those that interfere with bacterial cell wall synthesis. This is because ________. Group of answer choices bacterial cell wall synthesis is easily inhibited whereas eukaryotic cell wall synthesis is more resistant to the actions of the drugs bacterial cell walls have a unique structure not found in eukaryotic host cells eukaryotic cells do not take up the drugs eukaryotic cells inactivate the drugs before they can do any damage

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter22: Prokaryotes: Bacteria And Archaea

Section: Chapter Questions

Problem 8RQ: Many of the first prokaryotes to be cultured in a scientific lab were human or animal pathogens. Why...

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Antibiotic medication work by targeting specific structures and function in bacterial cells. Side effects in the patient are usually minimal, because their eukaryotic cells do not possess the same structures and characteristics as the prokaryotic pathogens. What structures or functions of the prokaryotic cell would serve as good targets for new antibiotics?
What is the best explanation for why a bacteriostatic treatment might be chosen over a bacteriocidal treatment? Bacteriostatic treatments will eliminate all bacteria while bacteriocidal treatments will only eliminate a portion of the bacteria. Bacteriostatic treatments typically have lower toxicity to the host when compared to bacteriocidal treatments. Bacteriostatic treatments will prevent all bacterial growth, while bacteriocidal treatments will permit some bacterial growth. Bacteriostatic treatments are typically more costly than bacteriocidal treatments.
Give an example of 1 antibiotic that targets each of the following in a bacterial cell (1 antibiotic won’t target all of these – you’ll be listing a different one for each) a. Cell wall ____________________________________ b. Protein synthesis (any part) ____________________________ c. Cell membrane ___________________________________________
A bacteria cell which is longer than it is wide is classified as: Vibrio Coccus Bacillus Bacteria which normal colonize the human gut are classified as: Anaerobes Pathogens Aerobes A bacteria which absolutely needs oxygen to live is classified as: Obligate anaerobe Obligate aerobe Facultative anaerobe The structure on this list which will NOT be found in any bacterial cell is: Cytoplasm Flagella Nucleus The genetic information of bacteria cell is contained in the: Capsid Nucleoid Ribosomes The genetic material of a virion is called the: Genome Nucleoid Nucleus
What cell types would be able to grow on the ECM in the following situations? F- , Hfr , Mix a) Streptomycin was not added to the ECM. b) The ECM contains thiamine. c) The ECM contains all 20 amino acids and all 5 nitrogenous nucleic acid bases
Bacteria have three major methods of resisting antibiotics. They may lack (or modify) the feature that the antibiotic targets, so that the drug has little or no effect. The may have an enzyme that helps them break down and inactivate the antibiotic. They may have efflux pumps that remove the drug from the cell. Which method of resistance are Gram-negatives particularly famous for? Group of answer choices target modification enzymatic breakdown horizontal transfer efflux pumps
In general, why might cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-positive bacteria? The gram-negative bacteria digest these drugs at a much higher rate than gram-positive bacteria. The mutation rate of gram-negative bacteria is much greater than that of gram-positive bacteria. The outer membrane of the gram-negative bacteria inhibits penetration of the drug. The peptidoglycan found in gram-positive bacteria is structurally different from that in gram-negative bacteria. The gram-negative bacteria do not synthesize peptidoglycan.
‘’Viruses cannot be grown in standard microbiological culture such as broth and agar. They need to be cultured in the presence of a suitable host such as prokaryotic cells (easiest to grow in the lab), plants and animals because they are unable to reproduce independently in living cells’’.2.1 Briefly, describe the advantages and disadvantages of cell culture.
Penicillin inhibits bacterial growth by preventing the cross-linking during peptidoglycan synthesis. Why does penicillin not inhibit growth of archaeal cells? Group of answer choices Most archaeal cells have a cell wall, but it is not composed of peptidoglycan. Archaeal cells do not have a cell wall. Penicillin is unable to penetrate the lipid outer membrane that blocks access of penicillin to the peptidogycan crosslinking enzymes. Pencillin is unable to penetrate the S layer to reach the peptidoglycan layer underneath.
Most antibacterial drugs disrupt or destroy prokaryotic cellular structures or processes that are different than those of eukaryotic cells or may not even be present in eukaryotic cells. List and describe at least three prokaryotic cellular features that could be targeted to inhibit or kill a bacterial pathogen without harming its eukaryotic host.
Which one of the following statements is the most accurate comparison of human, bacterial and fungal cells? (May answer is LETTER C but i am not sure hope somebody can help me ) A. Human and fungal cells have similar ribosomes, whereas bacterial ribosomes are different. b. Human and fungal cells have similar cell wall, in contrast to bacteria whose cell wall contains peptidoglycan. c. Human cells undergo mitosis, whereas neither bacteria nor fungi do. d. Human and bacterial cells have plasmids, whereas fungal cells do not have.
Which of the following is not true or related to bacterial capsule formation A. Rigid and attached tightly to the cell wall B. Loose and weakly associated with bacterial cell wall. C. Capsule formation is associated with virulence of pathogenic bacteria D. Capsule provides resistance to survive through harsh conditions