Which of the following are true of the above picture? (Select all that apply.) V The bacteria are Gram positive The bacteria are Gram negative | The bacteria are a pure culture

Q: One ml of a water sample was placed in a Petri dish with melted agar. After incubation, 129 colonies…

A: A colony-forming unit, or CFU, is a measurement of the concentration of microorganisms in a test…

Q: How can natural pigments produced by bacteria reveal their Gram stain reaction? O Natural pigments…

A: Gram staining is a procedure through which a bacterial species can be classified and distinguishes…

Q: A culture of E. coli has a concentration of 5 x 108 cells/mL. How many times do you have to dilute…

A: Given: 1. Number of colonies: 2502. No. of bacteria in culture: 5 X 108 3. Volume plated: 0.1 ml 4.…

Q: After proper incubation, you obtain your Mannitol Salt agar (MSA) plate and your MacConkey (MAC)…

A: MacConkey Agar is a selective and differential medium while MSA is a selective media and both are…

Q: bacterium is grown in an environment with tryptophan added to the medium.  Describe how the bacteria…

A: Tryptopham  is an amino acid and is a necessary ingredient to  synthesise its protein. There are…

Q: Students in a microbiology lab are provided with a culture of E. coli, and don't know how long it's…

A: Bacterial growth is increase in the quantity of cellular constituents and number .It depends upon…

Q: Observing the actual growth on your incubated plates, complete the table below. Describe the growth…

A: Bacterial transformation is a process in which the bacteria takes up the naked DNA (Deoxyribonucleic…

Q: Gram positive and Gram negative differ in their detail or diagram these differences. (two words).…

A: The gram-positive bacteria retain the crystal violet colour and stains purple whereas the…

Q: The colonies growing on the surface of solid media represent: Select one: a. A group of different…

A: The CFU/ml are often calculated using the formula:cfu/ml = (no. of colonies x dilution factor) /…

Q: The number of bacteria in a culture increases rapidly. The table below gives the number N (t) of…

A: Given Values: Number of bacteria at a time (t=0) = 1000 Number of bacteria at a time (t=3.1 hours) =…

Q: In an experiment Staphylococcus, streptococcus and enterococcus are bacteria that are stained dark…

A: Introduction:  The bacteria are classified on the basis of staining as gram-positive and…

Q: Which of the following is/are correct? a. Stained preparations of bacterial cells reveal much more…

A: Gram staining is used to identify bacteria. It is used to find bacterial infection in the cell.

Q: You decide to sample the bacteria growing on several items in a laboratory space. You follow aseptic…

A: By using an aseptic technique such as using applicator swabs dipped in a sterile broth solution to…

Q: place the statements into the following groups: Gram-negative organisms might incorrectly stain…

A: Gram staining is a staining technique used to differentiate two large groups of bacteria based on…

Q: Which of these is a correct match? (Select all that apply) O growth medium: an artificial liquid or…

A: Introduction: A growth medium or culture medium or nutrient broth is a solution which is freed of…

Q: A microorganism was streaked onto 4 nutrient agar plates and the plates were incubated at different…

A: Nutrient agar  A type of general media that supports growth of wide variety of microorganisms.

Q: Which of the following is false about a colony? O A colony is a population of cells formed from a…

A: The correct answer is E . A Colony is mixture of different bacterial cells  Bacterial colony is a…

Q: one or your lab partners has followed the rrecommended procedure of running Gram-positive and Gram…

A: Gram staining is a common laboratory test to characterize the bacteria into gram-positive and…

Q: Which one of the following is NOT considered a biohazard?            old bacterial cultures slides…

A: Biohazard is defined as any biological substance that can pose or cause a threat and harm to biotic…

Q: ) = 80e−0.05t + 8(t + 1)−0.5. Her model says that C(t) is the number of coliform group bacteria…

A: If considering the equation C(t) = 80e−0.05t + 8(t + 1)−0.5  Time is zero initially then  C =…

Q: The main difference between a gram-positive and a gram-negative bacteria, is that; a. Gram-positive…

A: The gram staining technique is used to distinguish bacteria into gram positive and gram negative…

Q: One of your lab partners has followed the recommended procedure of running Gram-positive and…

A: A popular method used to separate two large groups of bacteria, depending on the different…

Q: A microbiologist has isolated a new strain of bacteria, and is trying to characterize aspects of its…

A: Psychrophilic bacteria are cold loving bacteria that grows and reproduce at lower temperatures…

Q: Bacteria may be Gram + or Gram - due to their difference in staining. This stain is significant to…

A: Gram staining is one of the most common methods of staining used to classify bacterial species into…

Q: Which of the following statements is true of the bacteria pictured above? (Select all that apply) O…

A: Bacteria are microscopic organisms which belong to prokaryote because these are unicellular…

Q: The graph shows the number of microbial cells (log scale) against time in a liquid culture. In which…

A: Bacterial growth is divided into four stages. During the lag phase, the bacterium prepares itself by…

Q: You are incubating cells for 3 hours. The initial number of cells present in the sample were 102.…

A: Generation time is the time interval required for cells or a population to divide. Generation time…

Q: If one is trying to determine if a culture is pure or mixed, which medium would you choose? Why?…

A: In microbiology, to study the different types of microorganism we use different mediums which are…

Q: Shown below is the growth of E. coli in nutrient agar plates after exposure to different doses of UV…

A: E.coli or Escherichia coli, is a rod shaped, coliform, gram negative bacteria which is facultative…

Q: A pure culture is........... A. A culture of three to four different organisms B. A culture of one…

A: Culture in microbiology is spread of microorganisms in a medium of development . Per body tissue or…

Q: Which of the following statements are true of the bacteria pictured above? (Select all that apply.)…

A: Vibrio parahaemolyticus is an aerobic bacteria with vibrio-shaped cells and is Gram-negative…

Q: What is growth in "pure culture"? O Growth of human pathogens Growth of just one species in the lab…

A: A microbial culture is a method of multiplying microbial organisms by letting them reproduce in a…

Q: about the Gram stain is false?   A-In the Gram stain, a dye called crystal violet is used to stain…

A: Gram staining is a differential staining method  used for differentiating bacterial species into two…

Q: You have a culture of bacteria with an unknown number of bacteria in it. You have at your disposal…

A: Dilutions of microbial cultures or clinical and environmental samples are regularly needed in the…

Q: suffering severely due to alkaloid production a

A: Plants have an important source of life-saving medications where it is used in two ways such as…

Q: Which of the following would typically be the initial indicator of bacteria growing within a blood…

A: Blood agar is one of the commonly used culture methods used for growing micro organisms and growth…

Q: In the petri dish in Figure 1, the bacteria Esherichia coli (E. coli) was grown and treated with…

A: `E.Coli - E.Coli or Escherichia coli is a type of bacteria that normally lives in your intestines.…

Q: A SAB agar plate is exposed to air for 30 minutes and then incubated. The 10 colonies which grew on…

A: Sabouraud Dextrose Agar (SDA) is used for the isolation, cultivation and maintenance of…

Q: Examine the image below. The bacteria in this image have been treated with gram straining procedure.…

A: The Gram stain procedure distinguishes between Gram positive and Gram negative groups by coloring…

Q: We use salting and freezing to preserve our food against bacteria. Explain why is food preserved…

A: Food preservation refers to the practices of food processing that reduce the deterioration of food…

Q: A culture starts with 8600 bacteria. After 1 hour the count is 10, 000. A. Find a function the…

A: Bacteria are prokaryotic organisms that are devoid of cellular organelles like endoplasmic reticulum…

Q: Suppose you performed a Gram stain from a pure culture of bacteria and observed a field of red and…

A: Gram stain is a common method useful to differentiate two large groups of bacteria based on their…

Q: All except which of the following are important aspects to consider in determining the G+C content…

A: The G + C content in mol% of DNA is the proportion of guanine and cytosine with respect to the total…

Q: Explain how microbial agents A through D in the following diagram compare in effectiveness against…

A: It is used to determine the susceptibility of a given test organism (clinical) against a range of…

Q: Which of the following reports bacteria counts as colony-forming units? Turbidity Most probable…

A: Bacteria are microscopic unicellular organisms that can be grown in culture for the benefit of the…

Q: You are testing ground beef to determine how many bacteria are present per gram of meat. You place 1…

A: Given: Number of colonies = 122 The volume of sample plated in ml = 0.1 ml Dilution = 10-3 Dilution…

Q: . Which agar plate(s) would tell you if bacteria have been transformed? Circle the right answer(s)…

A: Bacterial transformation is the process of transfer of bacterial gene by which the bacteria take up…

Q: Which of the following regarding controlling microbial growth is true? a) Microbial death rate…

A: Microbes are small organisms that may cause diseases.

Q: Which of the following is true of the bacteria pictured above? (Select all that apply.) The bacteria…

A: According to guidelines we have to answer the first question only. so please kindly post the…

Modes of Nutrition

It is a biological process of providing or obtaining food that is necessary for growth and health. It includes many physiological processes - absorption, ingestion, assimilation, catabolism, excretion, etc. In biology, the science that deals with nutrition's physiological and chemical processes are called "nutritional science."