Homework Answers
The statement is false.
It is because it is the inert property of gelatin to remain liquefied at higher temperatures, but become solidified at lower temperatures. So, if gelatin would have been hydrolysed by bacteria, some halo or clear zones must have been observed. As it did not happen, the conclusion about bacteria hydrolyzing gelatin does not hold true.
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Question 3 of 6 Page 3 of 6 Question 3 (1 point) You remove an inoculated...
g submissions until Tuesday, March 10, 2020 at 3:00 pm Question 6 of 6 | Page...
g submissions until Tuesday, March 10, 2020 at 3:00 pm Question 6 of 6 | Page 6 of Question 6 (1 point) You inoculated a test tube containing urea agar with an unknown bacterium. After incubation, the urea agar changed from yellow to bright pink in color. Select all of the statements below that best reflect the results of this experiment. a Ob The enzyme urease is present. Urea is hydrolyzed. The agar medium is now alkaline. The agar medium...
Question 1 (1 point) An unknown organism was inoculated into a phenol red tub and produce...
Question 1 (1 point) An unknown organism was inoculated into a phenol red tub and produce a yellow coloration. The same organism was inoculated into a purple broth tube resulted in growth after the incubation period. Green slant tubes were also inoculated and resulted in a blue coloration. However, this organism was negative for motility within a SIM tube. Which of the following is the unknown species? Salmonella typhimurium Shigella sonnei Enterobacter aerogenes Klebsiella pneumoniae Escherchia coli O Proteus mirabilis...
Can anyone help me by checking my answers? please indicate the answer in a numerical order....
Can anyone help me by checking my answers? please indicate the
answer in a numerical order. thank you.
Question 1 1 pts TRUE or FALSE: When we are working with our metabolic unknown samples, we should prepare a new TSA slant each day. True False Question 2 2 pts Which of the following is NOT a possible result of a test in which your unknown bacteria were introduced into a tube of phenol red lactose broth? Fermentation of lactose producing...
you perform three 1:3 dilutions from a stock solution. You then remove 100 microliters from your...
you perform three 1:3 dilutions from a stock solution. You then remove 100 microliters from your last test tube and plate on a nutrient agar plate. You count 167 colonies post incubation. What was the concentration of the original culture (CFU/mL)? a45090 b4509 c6.9 d16700
Question 1 (1 point) In this lab you will attempt to hydrolyze the triacylglycerols ("fat") found...
Question 1 (1 point) In this lab you will attempt to hydrolyze the triacylglycerols ("fat") found in milk. What are the expected products for this hydrolysis? triacylglcerol and fatty acids fatty acids and glycerol glycerol and water water and triglycerides Question 2 (1 point) In this lab you will attempt to hydrolyze the triacylglycerols ("fat") found in milk. If hydrolysis is successful, what will happen to the pH of the milk solution? pH will increase pH will decrease OpH will...
Please answer 3 question Question 3 (1 point) If you pour water and cyclohexane in the...
Please answer 3 question
Question 3 (1 point) If you pour water and cyclohexane in the same test tube, what will happen? The chemicals will react to form cyclohexanol. The chemicals will mix completely. The water will float on top of the cyclohexane. The cyclohexane will float on top of the water. Question 4 (1 point) A student carried out the procedure in this lab and found an orange color formed in the cyclohexane. What is that evidence of? The...
QUESTION 1 All members of the bacterial family Enterobacteriaceae have an E. coli- like electron transport...
QUESTION 1 All members of the bacterial family Enterobacteriaceae have an E. coli- like electron transport chain, which means they are oxidase negative. True False QUESTION 2 The Synder test is intended to determine an individual's susceptibility to The pH of the medium has been adjusted to 4.8 and it includes a > 1% concentration of agar. This is to mimic the environmental conditions of reduced preferred by the cariogens. The primary cariogen is and the secondary is SNA's have...
Question 1 1 pts In this experiment, how can you tell when the baking soda is...
Question 1 1 pts In this experiment, how can you tell when the baking soda is completely decomposed? O the water level in the beaker remains constant O the water in the beaker bubbles the sample begins to smoke the sample turns dark grey O the rubber stopper pops out of the test tube Question 2 1 pts Which of the following safety precautions is advisable? O all of these answer choices O avoid burns from the laboratory burner O...
Part A 1. If you had used more methylene chloride in each step, you could have...
Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...
Microbiology ONLY answer 1 2 3 4 5 6 7 8 9 10 11 12 13...
Microbiology
ONLY answer
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Salmonella is associated with the handling of contaminated beef True False Escherichia coli is a red-pigmented organism. True O False The results of the MR-VP test can be directly read from the test without the addition of any other chemicals. True False Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and...
g submissions until Tuesday, March 10, 2020 at 3:00 pm Question 6 of 6 | Page 6 of Question 6 (1 point) You inoculated a test tube containing urea agar with an unknown bacterium. After incubation, the urea agar changed from yellow to bright pink in color. Select all of the statements below that best reflect the results of this experiment. a Ob The enzyme urease is present. Urea is hydrolyzed. The agar medium is now alkaline. The agar medium...
Question 1 (1 point) An unknown organism was inoculated into a phenol red tub and produce a yellow coloration. The same organism was inoculated into a purple broth tube resulted in growth after the incubation period. Green slant tubes were also inoculated and resulted in a blue coloration. However, this organism was negative for motility within a SIM tube. Which of the following is the unknown species? Salmonella typhimurium Shigella sonnei Enterobacter aerogenes Klebsiella pneumoniae Escherchia coli O Proteus mirabilis...
Can anyone help me by checking my answers? please indicate the
answer in a numerical order. thank you.
Question 1 1 pts TRUE or FALSE: When we are working with our metabolic unknown samples, we should prepare a new TSA slant each day. True False Question 2 2 pts Which of the following is NOT a possible result of a test in which your unknown bacteria were introduced into a tube of phenol red lactose broth? Fermentation of lactose producing...
Question 1 (1 point) In this lab you will attempt to hydrolyze the triacylglycerols ("fat") found in milk. What are the expected products for this hydrolysis? triacylglcerol and fatty acids fatty acids and glycerol glycerol and water water and triglycerides Question 2 (1 point) In this lab you will attempt to hydrolyze the triacylglycerols ("fat") found in milk. If hydrolysis is successful, what will happen to the pH of the milk solution? pH will increase pH will decrease OpH will...
Please answer 3 question
Question 3 (1 point) If you pour water and cyclohexane in the same test tube, what will happen? The chemicals will react to form cyclohexanol. The chemicals will mix completely. The water will float on top of the cyclohexane. The cyclohexane will float on top of the water. Question 4 (1 point) A student carried out the procedure in this lab and found an orange color formed in the cyclohexane. What is that evidence of? The...
QUESTION 1 All members of the bacterial family Enterobacteriaceae have an E. coli- like electron transport chain, which means they are oxidase negative. True False QUESTION 2 The Synder test is intended to determine an individual's susceptibility to The pH of the medium has been adjusted to 4.8 and it includes a > 1% concentration of agar. This is to mimic the environmental conditions of reduced preferred by the cariogens. The primary cariogen is and the secondary is SNA's have...
Question 1 1 pts In this experiment, how can you tell when the baking soda is completely decomposed? O the water level in the beaker remains constant O the water in the beaker bubbles the sample begins to smoke the sample turns dark grey O the rubber stopper pops out of the test tube Question 2 1 pts Which of the following safety precautions is advisable? O all of these answer choices O avoid burns from the laboratory burner O...
Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...
Microbiology
ONLY answer
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Salmonella is associated with the handling of contaminated beef True False Escherichia coli is a red-pigmented organism. True O False The results of the MR-VP test can be directly read from the test without the addition of any other chemicals. True False Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and...
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