Q: An apple pie has 3 million bacterial cells. The crust might have been inoculated with 500 bacterium.…
A: Bacteria are prokaryotic organisms. They reproduce asexually without the formation of gametes.…
Q: All bacteria produce spores. a) Trueb) False
A: Bacteria are the most important microorganisms to the food processor. Some bacteria are beneficial…
Q: Each of the following statements concerning asexual reproduction of bacteria is correct EXCEPT * O…
A: Among the animal and plant kingdoms, there have two types of reproduction, asexual reproduction, and…
Q: A certain culture of the bacteria stripped her classes and national has 10 bacteria to double every…
A: Bacteria divide by binary fission. This means each cell divides into two identical daughter cells.…
Q: 15. When a student adds antibiotic to the animal cell culture medium, the growth curve remains the…
A: Antibiotics are substances that inhibit growth or multiplication of bacteria. They are of two types…
Q: Which one of the terms below is NOT a stage in the typical growth curve of a bacterial cell under…
A: A typical growth curve of a bacterial cell under ideal condition in culture generally has four…
Q: 1. You have a culture of yeast that is at a density of 8x10' cells/mL 2. A lab technician took a…
A: Serial dilution is a process of diluting the stock sample to decrease its concentration by serially…
Q: Plateau Phase Death Phase Lag Phase Exponential Growth Phase Fen Ive cels Many e cees Dead cets 15…
A: Bacteria grow rapidly under a favorable environment where all the necessary conditions for its…
Q: Colony formation can be observed in liquid media. a) True b) False
A: Bacterial culture is the population of bacteria grown in the laboratory and in the culture, piles of…
Q: 20. Some bacilli are known as (AFB) 21. Staphylococci are known as 22. Some bacilli are motile; they…
A: As all the questions are related, first of all we can analyse the content and then find out the…
Q: Bacteria are not used as probiotic agents. True O False The growth of bacteria that form endospores…
A: Bacteria are prokaryotic microorganisms. Bacteria are ubiquitous in nature and are found almost in…
Q: In the period of bacterial growth,the phase where cells grow rapidly by binary fission is ? a)lag…
A: According to the question, we have to identify the period of bacterial growth, in a phase where…
Q: 1. Microorganisms are usually measured using in nanometer and microns. Viruses are about only 0.004…
A: The study of tiny living creatures such as bacteria, viruses, fungus, algae, and protozoa is known…
Q: 2. Shape and arrangement of your pathogen. Clostridium botulinum is a gram-positive bacteria that is…
A: Introduction The etiological agent of tuberculosis (TB), Mycobacterium tuberculosis, is a highly…
Q: During which of the four phases of growth would a gram-positive bacteria be most susceptible to…
A: Bacteria have a growth period of 3-4 days. When data from a complete growth period is gathered, a…
Q: True or False Exposure of bacterial cells to antibiotics: 50s is disrupted 60s is disrupted 80s is…
A: Organisms that have only one cell, are microscopic, and can exist anywhere(inside or outside the…
Q: How would you enrich for an organism that can use phenol as a carbon source?
A: Enrichment culture media is a type of growth media that is used to obtain the microorganisms of…
Q: Based on these results, which of the following statements is true regarding the effectiveness of…
A: A disinfectant is a chemical substance or compound that is used to inactivate or destroy the…
Q: 5. In this serial dilution process, WHICH PLATE will the microbiologist chose to count colonies for…
A: The microbial counts for the liquid and solid samples are usually determined - suspensions of E.…
Q: 1. A microbiologist sets up a serial dilution to analyze bacteria in raw milk. Tube 1-0.1 mL milk…
A: As per our guidelines, we are supposed to answer only one question. Kindly repost the question with…
Q: Consider the given bacterial growth curve (X axis is time, Y axis is log number of viable cells). At…
A: The number of live cells in a bacterial population over time is represented by the bacterial growth…
Q: Bacteria produce by sexual reproduction. O True O False
A: Reproduction is a kind of process which produces the progenies in the next generation from parent.
Q: Colony of (bacteria): A cluster of cells (or clones) which arise from a single bacterium by asexual…
A:
Q: A loopful of bacteria containing 1000 bacterial cells is inoculated into a nutrient broth and…
A: It is a multiple choice question.
Q: 8) Name the three basic shapes of the bacteria in the picture to the right. A B C a. b. 9) These…
A: Bacteria can exist as single celled or in pairs or groups. Bacteria are classified on the basis of…
Q: 12Bacterial growth can be measured a. Directly by counting bacterial cells b. Indirectly…
A: Introduction The bacterial cell cycle entails the replication of DNA and the partitioning of…
Q: A 23 year old woman has 10 E coli in her bladder. The organism has generation time of 20 minutes.…
A: Escherichia coli doubles itself asexually by the process known as binary fission. To predict the…
Q: 1. The time between inoculation and the beginning of growth is usually called the A) lag phase. B)…
A: Answer: Introduction: Microorganisms grown-up in closed culture also called as a batch culture in…
Q: The number of Microorganism A was exposed to a constant temperature of 117 C surviving spores of the…
A: D value is decimal reduction time and is described as time needed at a particular temperature for…
Q: TRUE OR FALSE only!
A: Answer 1 - Petri dishes and test tubes are containers used in cultivating microorganisms, but it is…
Q: 1. You dilute an original sample 1:50. You then count the number of yeast cells in the 1:50…
A: Please note, in keeping with regulations and in order to provide good and accurate solutions, the…
Q: VI. The average radius of the prokaryotic celts is: a. 0.5-2.0 um b. 1.(-4.0 pm c. 1.0-10.0 pm d.…
A: The average radius of prokaryotic cells is 1.0-4.0μm in diameter.Option is (b)correct answer Soil…
Q: The capsule is one of the most important factors of bacterial * virulence true False O
A: In the question we will ist provide the answer along with the explanation supporting our answer and…
Q: Which of the following is not true or related to bacterial capsule formation A. Rigid and attached…
A: Bacteria are unicellular prokaryotic microorganisms (nucleus is not enclosed in a nuclear membrane)…
Q: The graph represents the growth rates of different types of bacteria labeled W-z at different…
A: Answer: CARDINAL TEMPERATURE : Every microorganism grows at a certain temperature below which…
Q: True or False: Bacteria reproduce asexually using binary fission. O True O False
A: Bacteria is a prokaryote which has no nucleus and memory bound organelles.
Q: 6/ The critical process in microscopic preparation of samples is * Mounting O Labelling Staining 8/…
A: 6- The critical process in microscopic preparation of sample is staining. In staining process cells…
Q: Directions: Please provide 3-4 sentences giving a brief description of how your experiment could be…
A: Yeasts are able to grow in foods with a low pH (5.0 or lower) and in the presence of sugars, organic…
Q: Bacterial binary fission is proof that cells arise from pre-existing cells. True False
A: Introduction :- In biology, fission is the division of a single organism into two or more pieces,…
Q: You observe an area of no bacterial growth on ar agar plate after incubation with a bacteriophage…
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: hich of the following is a risk factor for Legionella spp. colonization and survival and why?
A: Legionella sp. causes pneumonia when inhaled with small water droplets in the environment. Hence,…
Q: Two flasks of E. coli are grown in batch culture in the same medium (2% glucose and amino acids; no…
A: The microorganism can be grown in-vitro. They can grow in semi-solid, liquid, or solid substances.…
Q: Which of the following is not consistent with an endospore? a. It is not a means of asexual…
A: The primary function of most of the endospore is for ensuring survival of a bacterium which goes…
Q: The picture shows bacteria (Escherichia coli) under a microscope Do you bacterial growth or no (…
A: In microbiology the bacterial culture plate is used for observing the growth of the microorganisms.…
Q: 39. Incubation period of disease is NOT influenced by which one of the following factor ? Group…
A: External temperature.
Q: There are 10 mL of a culture of a bacteria at 104 cells/mL into 990 mL of the same broth at the same…
A: Introduction The growth curve of bacteria is the type of curve that tells us about the number of…
Q: . Bacterial spores function in bacterial reproduction . a) True b) False
A: a spore is a unit of sexual or asexual reproduction that is formed, in unfavourable conditions.…
Q: When microbiologists are working with bacterial batch cultures, we would expect to see no net change…
A: The most frequent laboratory growth method for studying bacterial growth is batch culture, however,…
Q: A microbiologist sets up a serial dilution to analyze bacteria in raw milk. Tube 1 – 0.1 mL milk…
A: Dilution is a phenomenon in which final solution are prepared having concentration comparatively…
Q: Bacteria growth and multiplication play a role in infectious diseases : Bacteria can increase in…
A: According to the question given above, we have to find out the growth curve effect on the generation…
1. Bacterial growth occurs sexually through binary fission
true or false
2. the
true or false
3. Bacterial Growth: generation time in bacteria is usually a couple of days.
true or false
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Which one of the terms below is NOT a stage in the typical growth curve of a bacterial cell under ideal conditions in culture? O Exponential phase Lag phase Stationary phase Leg Phase Death PhaseIm 100 4. You have a culture of yeast that is at a density of 8x10' cells/mL. You dilute the sample 1:10, then 1:1,000 again, and finally you dilute the sample an additional 1:5. You add 0.1 mL of the final dilution to a spread plate. Assuming that most of the cells in the original culture were living, how many colony- forming units do you expect to count on your pour plate the next day?Plateau Phase Death Lag Phase Exponential Growth Phase Phase Fen ve cels Many ive cets Dead cells 10 15 20 25 30 35 40 45 Hours Consider the above figure which depicts the growth curve of microorganisms such as Saccharomyces cerevisiae. Now, reflect upon the components which make up the growth medium used to cultivate yeast. Whilst the growth medium was being made, the component which provides a source of energy for yeast was omitted. VWhat component was left out? What effect will this have on the growth curve phases and the rate at which they occur, especially in regard to the 'Exponential Growth' phase of the yeast? Loganmm/10of Vahie Cels
- 8. Pigment or color (e.g.: opaque, translucid, red, yellow, rose, violet, etc..) is also another characteristic that can be used to identify your microorganism in a slant. Thus, write down the name of three microorganisms (using scientific notation: Escherichia coli) that present a pigmented pattern of growth in a slant (write down the color of each pigment) and the name of the disease that they may cause. 200%- 927 PM 0 日 2/7/2021 21 DELL Insert Delete F11 F12 PrtScr F9 F10 F7 F8 F6 F3 F4 F5 Esc F1 F2 Backspace & # 2$ 8 4 1 2 P Home R T E Enter K Shift V B Page Down Page Up Alt Ctrl Alt THome ノ/ *00 Σ1. What is the generation time of a certain bacteria with an initial number of bacterial cells of 1x104 increases to 1x10¹5 after 5 hours and 25 minutes? 2. How long would it take for a certain bacterial cell to increase from 1x10² to 1x10²7 when the generation time 25 min?7. E. Coli bacteria were grown in a 5.0 L batch cell culture reactor, with the following data collected: Cell Count (per mL) 10,277,000 Inoculation Time ---> Time 11:19 am 11:35 am 11:57 pm 12:08 pm 12:45 pm 1:07 pm 1:11 pm 1:16 pm 1:19 pm 1:34 pm 1:46 pm 1:57 pm 2:09 pm 2:33 pm 10,313,000 20,984,000 29,750,000 60,202,000 210,909,000 224,750,000 227,960,000 229,216,000 229,115,000 227,260,000 204,935,000 183,745,000 146,103,000 (inoculation is when the cells are first put in the growth media) A. Draw a log10 X vs. time graph and label the phases for batch cell growth. B. Calculate the specific growth rate, μ, and mass doubling time, td, for the exponential growth phase. C. Calculate kd, the specific rate of cell mass loss due to cell death (For B & C, it will be helpful to re-plot the y-axis as In X or In (X/X.), and focus on only the data in that phase) Using spreadsheet software will be helpful in drawing this graph and analyzing data for parts B & C. Be as quantitative as possible,…
- 4. You have a culture of yeast that is at a density of 8x107 cells/mL. You dilute the sample 1:10, then 1:1,000 again, and finally you dilute the sample an additional 1:5. You add 0.1 mL of the final dilution to a spread plate. Assuming that most of the cells in the original culture were living, how many colony- forming units do you expect to count on your pour plate the next day?8. Pigment or color (e.g.: opaque, translucid, red, yellow, rose, violet, etc..) is also another characteristic that can be used to identify your microorganism in a slant Thus, write down the name of three microorganisms (using scientific notation: Escherichia coli) that present a pigmented pattern of growth in a slant (write down the color of each pigment) and the name of the disease that they may cause. F10 F12 F6 %24 6. R. Home Enter K F G A Shift C Page Up Page Down Alt Ctrl Alt ΣIdentify the stages of bacterial growth Identify the stages of bacterial growth b. d. a. Time (hr) 10 a. lag or arithmetic b. Logarithmic or Exponential + C. Stationary (Plateau) d. Decline Describe the events in each stage Describe the events at each stage I nutrients, ↑ metabolic waste, overcrowding - cultivation becomes sterile - accelerated binary fission adaptation, synthesis of DNA, RNA, proteins answer all parts of the question.
- IS IT A FACT OR A BLUFF? 1. Bacterial genetic material is composed single stranded DNA as compared to human DNA which is double stranded. 2. Just like humans, all microbes need oxygen to grow and reproduce. 3. There are no living microbes in volcanic vent and in hot spring because microbes die at very high temperature. 4. Most bacteria growth is retarded at low temperature. 5. Bacterial ATP production happens in the mitochondria which is the powerhouse of the cell. After identifying your answer whether fact or bluff, you need to give justification to your answer. You Justification should be given in not more that 50 words.48)Researchers are designing several experiments to test the ability of Salmonella bacteria to develop antibiotic resistance. A culture of Salmonella bacteria is exposed to the same concentrations (200 mg/L) of an antibiotic for four days. The table shows the number of isolated resistant bacteria over a four-day period. Which of the following statements best explains these results? Day Number of Resistant Bacteria in the Culture 1 5 59 3 677 4 32,456 The bacteria were not affected by the antibiotic. After being exposed to the antibiotic, the bacteria altered their DNA. A new species of bacteria emerged after the antibiotics were introduced. Random mutations led some bacteria to be resistant and, over time, they increased in the population.6a. A sample is given to you that contains 6 million cells per ml. You must make a series of serial dilutions in order to get a countable number on a plate to prove that there are indeed 6 million cells per ml. The plate that you eventually put a sample of bacteria on must have between 10 and 100 colonies for ease of counting. What dilutions do you make to get this many colonies on a plate? How many colonies do you have on that plate? Show what dilutions you make (Write exactly how much liquid you move into each test tube and how much liquid was in the test tube, ex. Move 1 ml of culture into 9 ml of water – 10x dilution). Don’t forget to tell me how much liquid you eventually put on your plate. (If you want to draw something out, you could draw then take a picture of it with your phone and submit the image along with the worksheet). 6b. Do the same problem as in 6a, but now you have to do it in 3 test tubes or less. What dilutions do you do now? please use drawings to help…