Q: Why is it important for the commercial canning process to destroy the endospores of Clostridium…
A: An endospore is basically a dormant, tough and non-reproductive structure produced by some bacteria.
Q: What do you mean by bassidiospores?
A: Fungi are eukaryotic organism that includes yeasts, molds and mushrooms. They are placed in kingdom…
Q: What do you call this type of bacterium? How is it structurally different from a spirillum?
A: Bacteria are small single-celled organisms. They are found almost everywhere on Earth and are vital…
Q: What is meant by a bacterial “colony” or colony-forming unit?
A: Introduction A colony is made up of two or more conspecific individuals who live in close proximity…
Q: How is Thermoplasma able to live in acidic, very hot coal refuse piles when it lacks a cell wall?
A: Thermoplasma belongs to genus Thermoplasma) is a phylum of prokaryotic organisms that means they…
Q: Why does an facaltive anaerobic bacterium usually grow better with oxygen than without?
A: A facultative anaerobe is one which is able to survive in both aerobic (oxygen) as well as anaerobic…
Q: Why are ether-linked lipids in Thermodesulfobacterium unusual?
A: Bacteria are a group of prokaryotic microscopic single celled organisms. They live in diverse…
Q: . If you wanted to determine the number of endospores in a sample of soil, what could you do before…
A: Endospores are defined as the differentiated cell formed or produced within cells of a particular…
Q: What are endospores? Why are they formes?
A: An endospore is a tough, dormant, non-reproductive structure which is produced by a small number of…
Q: When are endospores produced?
A: Bacteria are a group of prokaryotic microscopic single celled organisms. They live in diverse…
Q: What is formed when an endospore germinates?
A: Spore formation is very common in bacteria. These spores are non-Motile in nature e.g. Conidia,…
Q: How to distinguish bacteria if a bacterial colony formation happens and a certain bacteria appearing…
A: Bacteria flourish on culture media in the form of colonies. A colony is specified as a visible mass…
Q: What external structure on the endospore acts as a protective barrier? What is its composition?
A: Bacteria are unicellular prokaryotic organisms that maintain a definite shape since it contains a…
Q: What are bacterial colonies and how are theyformed?
A: Solid media or medium is a liquid or gel which is designed in such a way to provide support for the…
Q: What steps are necessary to ensure the sterility of materialcontaminated with bacterial endospores?
A: During endospore formation, the bacteria protoplasm is condensed to a limited volume, which leads to…
Q: How are different and/or alike the akinetes and the bacterial endospores?
A: Akinetes are non-motile cells that actually differentiate from the vegetative cells. It is dormant…
Q: Discuss the resistance and significance of endospores.
A: The endospore is a non-reproductive structure which is produced by archaea and some bacteria. It is…
Q: How can you tell the difference between yeast and bacteria?
A: Microorganisms or microbes are microscopic organisms that exist as unicellular, multicellular, or…
Q: What Are The Conditions When Gram Positive Bacteria Can Appear Gram Negative?
A: Gram positive bacteria have thick cell wall and they give positive result in gram stain test , in…
Q: What are the dimensions of therod-shaped bacterium Escherichia coli?
A: Bacteria are microscopic, single-celled, prokaryotic organisms. They are much smaller than other…
Q: Which is Baker's yeast?
A: A fungus is any member of the group of eukaryotic organisms that includes microorganism such as…
Q: When observing the endodpore slide in the microscope, what is the difference between endospore and…
A: In spore staining the dye, Malachite green is used for staining the spore, and steaming is used as…
Q: In what ways do the macroscopic features of bacterial colonies differ from those of molds?
A: Molds are a type of fungus. These are small, white, green, orange, purple, or black. They live…
Q: What factors can cause a lag phase in a bacterial growth curve?
A: The bacterial growth curve represents the number of live cells in a bacterial population over a…
Q: How is the presence or absence of viable endospores related to sterility?
A: Endospore is a resistant asexual spore that develops inside the bacteria under the extreme…
Q: What is obligate aerobe and obligate anaerobe?
A: Microorganisms are divided into two categories anaerobes and aerobes. These categories are based on…
Q: What is the stimulus for endospore production in bacteria?
A: The structures that are formed inside certain bacteria known as Endospores. Common bacteria species…
Q: Describe the structure of endospores.
A: Endospores are produced by bacteria belonging to the phylum Firmicutes. Bacteria are unicellular and…
Q: Relative to cells, how big are endospores?
A: Endospores are thick walled ; round dormant structure which develops with in the vegetative…
Q: What is a microaerophile?
A: Prokaryotes require different environmental conditions for their survival. Some prokaryotes survive…
Q: Where are extremophiles found?
A: Extremophiles are organisms that are found and adapted to thrive in extreme environments.
Q: Do all endospores necessarily stain green? If not, explain why.
A: Endospores are a non-reproductive structure developed by bacteria that belongs to the Firmicutes…
Q: Are bacterial endospores reproductive structures? Explain why or why not.
A: Bacteria is a unicellular, prokaryotic, microscopic organism that maintains a definite shape since…
Q: How might the bacterial growth curve change if a facultative anaerobe was first monitored for growth…
A: *Facultative anaerobes are bacteria which can grow in presence or absence of oxygen. * oxygen…
Q: In determination of microbial motility, what morphological structure is responsible for bacterial…
A: Introduction: Bacterial motility: Bacteria have developed a huge variety of movement mechanisms to…
Q: Why is E. coli O157:H7 an organism of concern in contaminated foods? The strain is represented as…
A: E.coli is a prokaryotic organism (bacteria) found in intestine of animals including humans, this…
Q: In what phase of the bacterial growth curve do cells die at rapid rates?
A: The bacterial growth is the complex process which involves anabolic and catabolic reactions which…
Q: Why do most iron-oxidizing bacteria grow at anacidic pH?
A: Iron-oxidizing bacteria are those chemotropic bacteria that obtain the energy for their living and…
Q: What features of the endospore contribute to its resistance to harsh conditions?
A: Endospore is the non-reproductive and dormant structure produced by bacteria. The formation of these…
Q: Where would you expect to find purple sulfur bacteria in nature?
A: Bacteria are members of a large group of unicellular microorganisms. Bacteria have cell walls but…
Q: Which of the following is typically found in aquatic bacteria, especially among phototrophic types,…
A: Phototrophic bacteria: Phototrophic bacteria obtain energy for their development and survival from…
Q: Outline the regulatory mechanisms used by Bacillus subtilis to control endospore formation
A: Bacteria is a unicellular prokaryotic organism that cannot be seen through the naked eye. Some…
Q: Why does exposure to UV radiation cause death in vegetative cells but not endospores?
A: An endospore is a rough, non-reproductive, and dormant structure. It is produced by the bacteria in…
Q: What conditions are necessary to destroy endospores? In what device are these conditions achieved?
A: Endospores are dormant vegetative cells that have a thick outer covering making them resistant to…
Q: What is the morphology and optimum growing conditions of Thermophilic Molds?
A: These are multicellular filamentous fungi.They have thallus which lack true root ,leaves and stem.…
Q: What are the disadvantages of gram-negative heterotrophic bacteria?
A: As we know that gram staining is differential staining method for differentiating bacterial species…
Q: Which among statements A-D is not applicable to endospore formation?
A: Endospore is a highly resistant non-reproductive structure developed by gram positive bacteria…
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- Question 7 Microbiology BIOL 2420 What does the line at the end of the arrow represent? Question 7 options: a) therapeutic index of the antibiotic b) minimum inhibitory concentration c) end of diffusion of the antibiotic d) more than one of thesequestion 11 Explain the role of streptomycin in the lab. 1. Streptomycin was the bacteria to which we applied the antibiotic 2. Streptomycin refers to the spreading process that precedes incubation. 3. Streptomycin is the growth medium that bacteria require to grow. 4. Streptomycin was the antibiotic to which we exposed the bacteriaQuestion 5 You spread a small amount of a water sample from the environment on an enriched media agar plate. After 24 hours, the plate is covered with many small yellow colonies. Does this plate contain a pure culture of bacteria? ○ No, because it came from the environment, there are lots of different organisms. ○ We know there are multiple species present, but each colony is a different species. ○ Yes, we know the plate contains a pure culture because there are individual colonies. ○ We do not know if the plate contains a pure culture or a mixed culture. or even if individual colonies are pure or mixed based on their appearance alone.
- Question 6 Which of the following is the correct sequence for the aseptic transfer of a bacterial culture? - 1. 2. 3. 4. 5. 6. 7. Remove the lid of the media receiving the culture & flame the mouth of this tube. - 1. 2. 3. 4. 5. 6. 7. Flame the mouth of the culture tube. - 1. 2. 3. 4. 5. 6. 7. Insert the wire loop with the culture to inoculate the bacteria on or in the new media. - 1. 2. 3. 4. 5. 6. 7. Reheat the mouth of the culture tube and replace the cap. - 1. 2. 3. 4. 5. 6. 7. Sterilize the loop by heating it from base to tip uniformly orange-hot. - 1. 2. 3. 4.…Question 4 To means to allow the bacteria time to grow and reproduce for a period of time in ideal conditions . 1. inoculate 2. colonize 3. agarize 4. incubateQuestion:- Two different patients suspected of having a urinary tract infection submitted fresh urine samples to a lab for culture and antibiotic sensitivity testing. The samples were inadvertently left out overnight at room temperature. The next day, a medical technologist discovered the samples. Upon opening the first sample, the strong smell of ammonia was noticed. The second urine sample did not have a strong ammonia smell. Based on these observations, which urine sample most likely contained cells of the bacterium Proteus Vulgaris? Explain your answer. If these two urine samples had not been noticed until a week later, would you expect there to be a difference in the “odor” of the samples? Explain your answer.
- Question 5 Microbiolgy BIOL 2420 Suppose you do this test on a hypothetical Staphylococcus species with the antibiotics penicillin (P10) and chloramphenicol (C30). You record a zone of inhibition size of 25 mm for both disks. Which antibiotic would be more effective against this organism? Question 6 options: a) both would be equally effective b) chloramphenicol c) penicillinQuestion 8 How did we determine the degree of bacterial growth? 1. We approximated the number of colonies 2. we compared the weight of the plates before and after incubation 3. we watched for a color change in the agar 4. we watched for the release of metabolic gasesQuestion 7: How could immunotherapy be used to kill superbugs and how would this therapy distinguish between bacterial cells and human cells?
- Question 7 On which of these plates would you be most surprised to see colonies of E. coli growing after incubation? 1. antibiotic resistant E. coli on streptomycin positive plate 2. antibiotic resistant E. coli on streptomycin negative plate 3. antibiotic non-resistant E. coli on streptomycin positive plate 4. antibiotic non-resistant E. coli on streptomycin negative plateQuestion 2 A spreader was used to 1. to uniformly disperse bacteria across the surface of the agar 2. to transfer bacteria from the test tube to the agar plate 3. to simulate mutations for antibiotic resistance 4. to disperse the antibioticQuestion 26 A ___ is an even layer of bacteria on an agar plate. a progenitor cell b bacterial lawn c Kirby-Bauer test d colony