Which of these is an advantage of the low pH of yogurt? It allows for a...
Which of these is an advantage of the low pH of yogurt?
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It allows for a milder flavor |
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It decreases shelf life |
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It reduces bacterial growth |
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It provides the perfect environment for E. coli enzymes to function |
Homework Answers
organic acids produced by fermentation not only lower the pH but are also toxic for many microorganisms (thereby reducing bacterial growth) thus prolonging the shelf life while giving the acidic flavour
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Which of these is an advantage of the low pH of yogurt?
It allows for a...
please help answer, thank you! In this eight-year experiment, 12 populations of E. coli, each begun...
please help answer, thank you!
In this eight-year experiment, 12 populations of E. coli, each begun from a single cell, were grown in low- glucose conditions for 20,000 generations. Each culture was introduced to fresh growth medium every 24 hours. Occasionally, samples were removed from the populations, and their fitness in low-glucose conditions was tested against that of members sampled from the ancestral (common ancestor) E. coli population. Which of the following, if it occurs in the absence of any...
number 2 Plasmid-small extrachromosomal dsDNA which contains genes that regulate non-essential life functions Transformation-acquired genes from...
number 2
Plasmid-small extrachromosomal dsDNA which contains genes that regulate non-essential life functions Transformation-acquired genes from free-floating DNA in the environment Competent cell-bacterial cell wall and cytoplasmic membrane become porous and allows transforming DNA to enter the cell 2. Explain why-control E. coli cells cannot grow on L.BA+amp and L.BA+amp+X-Gal. 3. goal: Name a procedure which can replace the heat shock process and achieve the same electroportation What in the ninnee of andinn amnicillin to I RA2
48Which of the following includes normal residents that are restricted to mucus membranes and may cause...
48Which of the following includes normal residents that are restricted to mucus membranes and may cause systemic infections following dental procedures? Staph Lactobacillus Bifidobacter Clostridium Strep 47Changes in pH and temperature have an effect on the function of an enzyme by… amino acid substitution neutralization reactions regulating the rate of gene expression changing protein folding and shape competitive inhibition 46Which of the following is the most resistant form of life? cysts bacterial endospores enveloped viruses fungal asexual spores fungal sexual...
Food Microbiology Purpose To utilize the process of fermentation to make yogurt To describe organisms responsible...
Food Microbiology Purpose To utilize the process of fermentation to make yogurt To describe organisms responsible for food borne illnesses and summarize a recent outbreak Introduction Microorganisms have been used for centuries for food preservation and to improve or change its taste. Evidence exists that yogurt, which is milk fermented by bacteria, has been around for over 4000 years. Today, many of the foods we eat are the result of microorganisms acting on foods for a specific and desired effect....
Which pattern of survivorship is most likely for an organism such as the penguin, which produces only a single offspring at a time,
7. Which pattern of survivorship is most likely for an organism such as the penguin, which produces only a single offspring at a time, provides a lot of parental care and has a relatively long lifespan? Most offspring survive for most of their potential life span and then die at approximately the same time. The probability of death due to natural causes is high throughout the life span. Survivorship is low early in life and then levels off. Young individuals have a...
2. hypothesize the best conditions (pH and temperature) under which the enzyme chymotrypsin functions with an...
2. hypothesize the best conditions (pH and temperature) under
which the enzyme chymotrypsin functions with an appropriate
reference. also, hypothesize what will occur in the presence of an
inhibitor and the type of inhibition.
EXPERIMENT 5: ENZYME ACTIVITY WITH a-CHYMOTRYPSIN Prelab Assignment 1. Prepare a flow chart, covering one half of the experimental work (either part A and C if your lab bench is on the window side of the lab or part B and D if your locker is...
Q14. In the lab info it says that as a rule, most microbes can adjust to...
Q14. In the lab info it says that as a rule, most microbes can adjust to a range of salt concentrations. 7/29/2019 Which cell structure allows microbes to physically withstand hypotonic environments? Cell wall MSA has two properties. It is both selective and differential. When bacteria grow on this media, there is a visible difference between bacteria that ferment mannitol, and the bacteria that do not See Figure 2 (a)-effects of selective/differential media. Q15. Which of the following is correct...
please help 21- Which of the following is an acid fast microorganism a) E. col b)...
please help
21- Which of the following is an acid fast microorganism a) E. col b) S aureus c) S pneumonia d) Mycobacterium smegmatis 22-23 You are given a mixed culture containing E: coli and M. luterus. Explain how you would isolate them and prepare a pure culture of each. Be specific. is ideal due to 24-To cultivate fungi, a selective medium such as its low pH that inhibits bacterial growth. a. Sabouraud agar b. Nutrient agar c. Mueller Hinton...
Which of the following statements about Huntington's is true? You can retry this question, the average...
Which of the following statements about Huntington's is true? You can retry this question, the average of your two answers is recorded. You should see feedback if you get a question wrong. O a. The mutated allele(s) has/have lost the function of keeping brain cells healthy, and is/are therefor a dominant disease O b. Huntington is a very rare and therfor recessive. c. Huntington strikes people after reproductive age and is therefor dominant. d. The mutated allele(s) has/have gained the...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic acid (pK,-3.86) and 0.050 M sodium lactate 1: The aqueous environment of cells: A. Is generally irrelevant to biochemical structures and processes B. Serves as a source of energy for biochemical A. 3.16 B. 4.56 processes С. 3.82 D. 3.9 C. Provides an appropriate context for polar molecules and H-bonding that are critical for life D. Allows biochemical molecules to move freely in solution...
please help answer, thank you!
In this eight-year experiment, 12 populations of E. coli, each begun from a single cell, were grown in low- glucose conditions for 20,000 generations. Each culture was introduced to fresh growth medium every 24 hours. Occasionally, samples were removed from the populations, and their fitness in low-glucose conditions was tested against that of members sampled from the ancestral (common ancestor) E. coli population. Which of the following, if it occurs in the absence of any...
number 2
Plasmid-small extrachromosomal dsDNA which contains genes that regulate non-essential life functions Transformation-acquired genes from free-floating DNA in the environment Competent cell-bacterial cell wall and cytoplasmic membrane become porous and allows transforming DNA to enter the cell 2. Explain why-control E. coli cells cannot grow on L.BA+amp and L.BA+amp+X-Gal. 3. goal: Name a procedure which can replace the heat shock process and achieve the same electroportation What in the ninnee of andinn amnicillin to I RA2
2. hypothesize the best conditions (pH and temperature) under
which the enzyme chymotrypsin functions with an appropriate
reference. also, hypothesize what will occur in the presence of an
inhibitor and the type of inhibition.
EXPERIMENT 5: ENZYME ACTIVITY WITH a-CHYMOTRYPSIN Prelab Assignment 1. Prepare a flow chart, covering one half of the experimental work (either part A and C if your lab bench is on the window side of the lab or part B and D if your locker is...
Q14. In the lab info it says that as a rule, most microbes can adjust to a range of salt concentrations. 7/29/2019 Which cell structure allows microbes to physically withstand hypotonic environments? Cell wall MSA has two properties. It is both selective and differential. When bacteria grow on this media, there is a visible difference between bacteria that ferment mannitol, and the bacteria that do not See Figure 2 (a)-effects of selective/differential media. Q15. Which of the following is correct...
please help
21- Which of the following is an acid fast microorganism a) E. col b) S aureus c) S pneumonia d) Mycobacterium smegmatis 22-23 You are given a mixed culture containing E: coli and M. luterus. Explain how you would isolate them and prepare a pure culture of each. Be specific. is ideal due to 24-To cultivate fungi, a selective medium such as its low pH that inhibits bacterial growth. a. Sabouraud agar b. Nutrient agar c. Mueller Hinton...
Which of the following statements about Huntington's is true? You can retry this question, the average of your two answers is recorded. You should see feedback if you get a question wrong. O a. The mutated allele(s) has/have lost the function of keeping brain cells healthy, and is/are therefor a dominant disease O b. Huntington is a very rare and therfor recessive. c. Huntington strikes people after reproductive age and is therefor dominant. d. The mutated allele(s) has/have gained the...
Multiple Choice (2 pts each) 6: Calculate the pH of a buffer containing 0.010 M lactic acid (pK,-3.86) and 0.050 M sodium lactate 1: The aqueous environment of cells: A. Is generally irrelevant to biochemical structures and processes B. Serves as a source of energy for biochemical A. 3.16 B. 4.56 processes С. 3.82 D. 3.9 C. Provides an appropriate context for polar molecules and H-bonding that are critical for life D. Allows biochemical molecules to move freely in solution...
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