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With regard to gram-negative enterics, what do the letters O, H,
and K stand for?
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- Which of the following is a correct way to write a bacterial name? O 1) Escherichia coli O 2) Staphylococcus Aureus O 3) STAPHYLOCOCCUS EPIDERMIDIS O 4) bacillus Subtilis O 5) pseudomonas aeruginosaYou perform a Gram staining technique on two bacterial species and observe that one is stained purple while the other is stained pink. Which of the following is consistent with this observation? a) The purple one is likely more resistant to penicillin b) Both bacteria have a cell wall made of mycolic acid c) Their peptidoglycan layers have the same thickness d) They differ in the number of phospholipid membranes e) One has a monolayer of phospholipids while the other has a bilayer of phospholipidsWhat is the expansion of acronym MICA?
- How was the product of streptomycin isolated by the scientist who discovered this?why is Brocardia anammoxidan a Gram-negative bacteria? what does gram negative bacteria mean?Botulism is cause by an: a)Rickettsia b)Aneorobic spore forming bacteria c)Gram negative diplococcus d) Gram positive coccus e) Aerobic spore forming bacteria
- 19) Which of the following BEST describes an agent that is bactericidal? A) Windex. B) It suspends bacterial growth. C) It kills the bacteria. D) It causes the bacteria to destroy themselves1) The slowest method in reducing the number of bacteria in a culture or the environment is: a) Sterilization b) Disinfection c) Antisepsis d) Sanitization e) Autolysis2) The molecule that helps insert the peptidoglycan monomers into the cell wall of the bacteria is: a) Ferredoxin b) Spherion c) Penicillin Binding Protein (PBP) d) Bactoprenol e) -Lactam Ring 3) A division in Eukaryotes that involves nuclear division without a cytokinesis will lead to the formation of: a) Baeocyte b) Mycellia c) Syncitium d) Myofibril e) all the above4) All the following are critical factors in determining the effectiveness of an antimicrobial agent except: a) Population size b) Species c) Location d) pH e) Temperature 5) The autoclave temperature must be raised up to _____ in order to effectively kill the bacterial spores: a) 121.1 oF b) 121.1 oC c) 121.1 oK d) 211 oF e) 112 oFWhich of the following BEST describes an agent that is bacteriostatic? A) It suspends bacterial synthesis of Tranexamic Acid. B) It kills the bacteria by destroying its cell wall. C) It zaps the bacteria with static electricity. D) It suspends bacterial growth.
- Which of the following agents if introduced into a growing culture of bacteria would halt growth but if removed would allow growth to continue? A) Antiseptic B) Bacteriostatic agent C) Disinfectant D) Bactericidal agent E) Sterilizing agentIs the Mueller-Hinton Agar (MHA) a complex or defined medium? Explain based on its composition. Is MHA a A) differential, B) selective, C) both differential and selective media, or D) neither? Explain based on what kind of microorganisms it allows to grow.Which of the following statements is a reason why Acid-Fast Bacteria resist the Gram stain a) Because their cell wall architecture varies from both gram-negative and gram-positive bacteria. b) Because they lack the peptidoglycan layer. c) Because they have a thick peptidoglycan layer. d) Because they have a thick layer of fatty acids.