Catalase negative - Study guides, Class notes & Summaries

What is fermentation - Being able to grow anaerobically in the presence of a suitable organic compound, such as a sugar. Several reduced products are excreted by the cell as a way of disposing of the electrons derived from oxidation. Function and Types of hydrolytic enzymes - Hydrolytic enzymes hydrolyze (break down) complex molecules to get food that can be transported into the cell. 1. Amylase 2. Caseinase 3. Gelatinase Amylase - catalyzes starch hydrolysis. Reacts readily with iodine...

GPC Exam Questions And Answers Streptococcus - Correct Answer-Beta Hemolytic, smaller zone compared to S. aureus S. pyogenes (group A) - Correct Answer-Impetigo, penicillin resistant, slightly elongated spheres Colony >.5mm (opposite Anginosus group) GPC chains catalase negative PYR pos / VP negative (opposite of Anginosus group) Bacitracin SUSCEPTIBLE agglutinate lancefield A serum S. agalactiae (group B) - Correct Answer-Beta Hemolytic (very hard subtle) Confirmatory test is CAMP ...

Microbiology GCU (Lab Exam) Final Review Questions & Answers 2024/2025 Selective Medium - ANSWERSA proprietary membrane-based assay developed by Fluka Analytical that tests for bacteria that cause urinary tract infections and differentiates them based on their color reaction on the membrane. Differential Medium - ANSWERSA growth medium that contains a component(s) that allows one to tell the difference between organisms that grow. Is mannitol salt agar selective or differential? - ANS...

Sputum reveals lancet-shaped, gram positive cocci arranged in pairs. What is this most likely? A. Strep. pyogenes B. Staph epidermidis C. Strep. pneumoniae D. Klebsiella pneumoniae - correct answer S. Pneumoniae -Lancet shaped diplococci structure -Catalase negative -Alpha hemolytic -Meningitis, sinusitis, otitis media and pneumonia What diseases are associated with Strep. pyogenes? - correct answer (RAN TIPS) Rheumatic Fever Acute glomerulonephritis Necrotizing fasciit...

Purpose of Blood Agar - correct answer See if bacteria has hemolysis abilities Purpose of Catalase Test - correct answer Determine if bacteria produces catalase Purpose of Indole Test - correct answer See if bacteria produces tryptophanase Medium for Indole test - correct answer Tryptone broth Purpose of Klinglers Iron Agar - correct answer See ability of bacteria to ferment glucose and/or lactose and the ability to produce CO2 and H2S gases Purpose of Lysine Decarboxylase Broth -...

CFS Test Questions and Answers with Certified Solutions Which of the following is not an example of an additive used to inhibit lipid oxidation? A) tocopherols B) ascorbic acid C) sodium benzoate D) EDTA C) sodium benzoate In a vegtable operation, the process specifies that peas be blanched prior to canning. What is the marker enzyme used to determine success of blanching? A) catalase B) peroxidase C) lipoxygenase D) chlorophyllase B) peroxidase What is the most effectiv...

Differential media - allow certain bacteria to be differentiated from others by change of color, zone of clearing, or other Bacteria can prevent phage attachment and escape infection by acquiring mutations on genes which alter their _________. - cell surface receptors A _______ agent does not kill a microorganism, but rather just inhibits its growth. - bacteriostatic A clear area surrounded by growth of host cells is called a _______. - plaque A color change to yellow on the mannitol salt ...

Microm 443 Midterm Question and answers correctly solved 2024/2025Staphylococcus aureus - correct answer Gram reaction: Gram positive cocci in clusters, tetrads and pairs Cell morphology: coccus Colony morphology: medium to large, white/creamy -> gold, possibly B-hemolytic Identification: B-hemolytic, catalase positive, most likely novobiocin sensitive, coagulase positive Normal Samples: carried in nose/nasal passage and skin of 10-40% of people Clinical samples: skin/hair follicle in...

CFS Test Questions and Answers with Certified Solutions Which of the following is not an example of an additive used to inhibit lipid oxidation? A) tocopherols B) ascorbic acid C) sodium benzoate D) EDTA C) sodium benzoate In a vegtable operation, the process specifies that peas be blanched prior to canning. What is the marker enzyme used to determine success of blanching? A) catalase B) peroxidase C) lipoxygenase D) chlorophyllase B) peroxidase What is the most effective analytical...

Name the steps necessary to perform a Gram Stain correct answers 1. Allow sample to dry 2. Heatfix sample using incinerator for 30-60 second 3. Flood with crystal violet and let it sit for one minute- rinse well with water 4. Flood with iodine and let sit for one minute - rinse well with water 5. Flood with decolorizer until the liquid flowing off the slide become clear - rinse well with water 6. Flood with safranin and let sit for one minute - rinse well with water Gram Stain interpreta...