1. What is the effect of boiling in the test tube with starch solution and saliva?
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- Will UPVOTE Answer the following: 1. What is the effect of boiling in the test tube with starch solution and saliva? 2. What is anaerobic oxidation? In your observation, which is the Hydrogen acceptor in the experiment, methylene blue or milk? 3. If the sample turned to blue or black upon the addition of I2 solution, is the honey genuine or not? Explain your answer 4. What changes do you think take place as the color changes upon the addition of phenol, pyrogallol or catechol and guac solution to the potato extract? 5. Differentiate an enzyme activator from an indicatorThe plate below is a test of 7 different antibiotics against Enterobacter aerogenes. The center disc is Ciprofloxacin 15 micrograms) and the 24 hour extent of the Zone of Inhibition is the farther diameter. The one below it and slightly to the right is Chloramphenicol (30 micrograms) [see red arrow}. Give me the extent of the Zone of Inhibition in mm (yes, use a ruler and measure it at the size it comes up on your computer screen), then use the Standard Table and determine R, I, S for each. Antibiotic Zone of Inhibition (mm) R, I or S Drug target Ciprofloxacin Chloramphenicol Which of the 2 drugs is more selective and why?Phenol Red Test Questions: Suppose you innoculate a phenol red broth with a slow-growing fermenter. After 48 hours, you see slight turbidity but score it as (-/-). Is this result a false positive or a false negative? Is this a result of poor specificty or poor sensitivity of the test system?
- Can you classify the following biochemical tests based on the following criteria and explain why you did so? Test based on the presence of extracellular enzymes Test based on the presence of intracellular enzymes Test ased on carbohydrate fermentation Test based on protein catabolism 1. Catalase Test 2. Oxidase test 3. MacConkey agar (MAC) Medium Test 4. Mannitol Salt Agar (MSA) Medium Test 5. Gelatin Hydrolysis 6. Indole Production 7. Motility-Indole-Ornithine Decarboxylation Test 8. Methyl Red / Voges-Proskauer (MR/VP) Test 9. Nitrate Reduction Test 10. Simmon’s Citrate Agar Slant 11. Triple Iron Sugar Test 12. Urease TestFor which of the five hydrolysis tests (starch, casein, triglycerides, tryptophan, and urea) would a positive test result be expected for: a. the etiologic agent of acne, Propionibacterium acnes? Explain. b. the etiologic agent of gastric ulcers, Helicobacter pylori? Why would this activity be advantageous in this environment?Please submit your assignment on the following topic 1. Lipid Hydrolysis Test principle and their importance? 2.Starch Hydrolysis Test principle and their importance? 3.Nitrate Reduction Test principle and their importance? 4.Voges Proskauer Test principle and their importance? 5.Methyl Red Test principle and their importance?
- Microbial secondary metabolites are compounds produced by strains of certain microbial(antimicrobial agent).such as penicillin and cephalosporin. Describe the industrial fermentation process of each of these antibiotics. 1. according to given information which type of fermentation process (batch, fed-batch, continuous) and bioreactor used.https://www.youtube.com/watch?v=rKng5-ij6kQ Provide a schematic diagram for the Molish test methodologies in determining the presence of carbohydrates. Also, give the basic principle for the test. (not a graded question, the video is very brief) (please take time to answer)Give one or two product of Milk and answer the following queston: look at the labels of the different milk preparations: 1. Method of sterilization used. 2. What is the Bacterial culture and flavor used if there is any. 3. What is the Fat, Protein & Carbohydrate(sugar) content? 4. Is fortification done? What substances has been fortified (based on the label)? 5. Are Vitamins & amino acids added? Name them based on the label.
- How can I explain the results of my findings in lamen terms? 1 - Name of Test Type of Medium 2 - Color Before Incubation 3-Color After Incubation? 4 – Results Positive/ Negative? 5 - Reagents Added Lactose Fermentation test Phenol Red Lactose (PRL) Red Color: Yellow Gas Bubble: Yes Positive Phenol Red to detect color change (added) Glucose Fermentation Test Phenol Red Glucose (PRG) Red Color: Yellow Gas Bubble: Yes Positive Phenol Red to detect color change (added) Citrate Utilization Simmons Citrate Green Color: Blue Positive Bromthymol Blue (added) Indole Test Media = SIM Clear Indole: Color: Clear Negative For Indole, we add Kovac’s Hydrogen Sulfide Test Media = SIM clear Hydrogen Sulfide: Color: Clear Negative Iron already added Methyl Red Test (MR test) Media = MRVP Broth Clear Color: Yellow Negative We add Methyl Red Reagent Voges-Proskauer Test (VP test) Media = MRVP Broth Clear…Please answer questions 1 and 2 directly. 1. Discuss what is isoelectric precipitation/point? 2. Differentiate whey from casein (refer from the posted picture)GIVE A DETAILED AND COMPLETE DESCRIPTION FOR THE FOLLOWING: 1. What are the culture media used in the following tests? — indole production test (indole production from tryptophan) — lysine decarboxylase test 2. What are the expected results in the following tests? — indole production test (indole production from tryptophan) — lysine decarboxylase test