You set up an anaerobic jar and after incubation the indicator strip is blue. What can you conclude from this? Are the organisms growing on your plate anaerobes? Explain.

Q: You have 2 organisms, A and B. One is an obligate aerobe and the other is an obligate anaerobe. You…

A: Microorganisms are categorized based on their oxygen requirement: Obligate aerobes Obligate…

Q: Briefly explain how you can determine the presence of coliform bacteria in a water sample.

A: Coliforms are a type of bacteria. These organisms are normally harmless to the species or hosts 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: Two different bacterial samples, A and B, were inoculated onto SIM media. What can you conclude…

A: SIM (Sulfide, Indole and Motility) test is done to differentiate the Gram negative bacilli based on…

Q: Which organism(s) would likely be classified as an alkaliphile?

A: The pH is a negative logarithm of the hydrogen ion concentration. It measures how many hydrogen ions…

Q: equires oxygen at a lower concentration than typically found in air.   Question 3 options:   a)…

A: Throughout nature, aerobic and anaerobic environments can be found in diverse niches. These…

Q: Which has a greater impact on the survival of an organism, temperatures above its maximum…

A: The microbes grow in a wide temperature range. The microbial growths are found to be higher at their…

Q: The figure below is an electron micrograph of the gram-negative bacterium Azotobacter vinelandii,…

A: Bacteria are small microscopic prokaryotic organisms. They lack a true nucleus and other double…

Q: You have discovered a new microorganism that oxidizes ammonia. How will you determine if this…

A: Thaumarchaeote is a prokaryote which belongs to Archaebacteria. The archaebacteria and bacteria…

Q: After comparing the growths on the two plates of Brewer’s anaerobic agar with the growths in the six…

A: Anaerobic agar is used for anaerobic microorganisms cultivation. The anaerobic bacteria are not…

Q: James inoculated a species of bacteria into KIA media and realized that it has a yellow butt and a…

A: This question is about identification of lactose non fermenting strain which is to be grown in…

Q: Organism 1 Organism 2

A:

Q: Which of the following would you most expect to find in a fecal contaminated water sample?…

A: Water pollution is described as the fouling of bodies of water. Water pollution occurs when rivers,…

Q: (a) Escherichia coli, and (b) Staphylococcus epidermidis b-

A:

Q: Why do we test water for coliforms if they are not considered pathogenic?

A: Introduction Coliforms are gram-negative, non-sporulating and motile or immotile bacteria. They…

Q: A chemolithoautotroph is respiring using only iron (Fe3+) and nitrite (NO2-). This bacterium does…

A: INTRODUCTION Chemolithoautotrophs These are organisms that obtain energy from oxidizing inorganic…

Q: Make vinegar using starch as raw material. Outline the process steps in a schematic diagram stating…

A: The term vinegar actually refers to the two-step process of fermentation from carbohydrate to…

Q: Salmonella typhi is a facultative anaerobe. Explain why.

A: Salmonella is a genus of Gram-negative bacteria that are rod-shaped (bacillus) and belong to the…

Q: The generation time of a bacterium was measured at two different temperatures. Which results would…

A: The small microscopic, unicellular organisms that are generally not visible to the naked eye are…

Q: What would you need to culture the following microorganisms? (Note the hints and/or choices after…

A: Thermophile - Organisms tolerant to high temperature  Mesophile - organisms tolerant to moderate…

Q: Microbes that can survive and thrive in extreme environments are called extremophiles. In this…

A: Extremophiles are organisms, typically microbes, that are capable of thriving and surviving in…

Q: Why is it important to determine the number of mesophilic spores in a food ingredient?

A: Sometimes  spore forming mesophilic bacteria found in food ingradient, mainly in dairy product. It…

Q: Is the Peptone Iron Agar (PIA) a complex or defined medium? Explain based on its composition. Is the…

A: Depending on their composition, media can be classified as defined and undefined media. Defined…

Q: Breakdown of the items in the image can occur through an anaerobic process to generate a renewable,…

A: In the absence of oxygen, bacteria utilize anaerobic digestion to break down organic materials,…

Q: You observe a culture of bacterial cells that has been grown in liquid thioglycolate media and…

A: Thioglycolate broth is a differential medium enriched with several nutrients such as casein, yeast…

Q: O

A: vinegar  is a solution of acetic acid produced by 2 steps .in a first step fermentable sugars are…

Q: ou are given an unknown bacterium in the lab and have to determine unknown bacterium's oxygen needs.…

A: Each living organism has certain kind of respiration process for synthesizing energy by breaking…

Q: If you had a mixed culture that contained a Gram-negative enteric bacterium and Gram-positive…

A: MSA or mannitol sale agar used in microbiology. It encourages growth of some group of bacteria…

Q: Besides being able to tolerate a range of pH some bacteria change their environment by producing…

A: Due to metabolic activities of the bacteria/microbes, different bye-products are produced which…

Q: What is the role of these organisms in the Winogradsky column and what are the physical indications…

A: The Winogradsky column is a synthetic microbial environment and a reliable source of different…

Q: You collected a sample from a patient with a suspected STI. After Gram staining, you observed this…

A: The staining of bacteria is an important method of classifying the bacteria There could be multiple…

Q: Why do low concentrations of alcohol inhibit Gram-negative bacteria more than Gram-positive…

A: As per our company guideline we are supposed to answer only first question or first 3 subparts of…

Q: Explain why gram negative bacteria in general are more toxic than gram positive bacteria.

A: Introduction : Bacteria are small microscopic prokaryotic organisms. These organisms lack a true…

Q: based on the article What happens to the microbial environment as cheeses like Gouda, Cheddar, or…

A: Introduction  Microbiota, also known as gut flora or microbiome, refers to the community of…

Q: Bacteria that prefer to grow at room temperature at low pH are: Mesophilic acidophiles…

A: Bacterial growth is influenced by many factors such as temperature, oxygen requirements, pH, source…

Q: Why will a strict anaerobe grow in thioglycollate broth even when the medium is exposed to…

A: Introduction :- Anaerobic bacteria are microorganisms that can thrive without oxygen. For instance,…

Q: Oxygen is always beneficial to micro-organisms. Discuss this statement in the context of factors…

A: Micro organisms are the microscopic organisms that are present on the earth in abundance. These…

Q: Temperature 20°C 37°C 60°C 100°C O CFU 8 CFU 3 CFU O CFU Microbes inoculated on aga 2 CFU O CFU…

A: Microbes are classified into various groups based on their nutrient requirements. Based on the…

Q: if a bacterium lacks cytochrome C oxidase, does that make the bacterium an anaerobe? Explain?

A: Cytochrome c oxidase  is an enzyme present in the cytochrome sub unit. This is found in the electron…

Q: Suppose you observed a bacterium growing on Mannitol Salt agar (MSA) with a yellow colony appearance…

A: Staphylococcus aureus is a bacterium that is commonly found on the skin and in the nasal passages of…

Q: A bacterial organism is catalase positive and cytochrome oxidase positive. This could suggest that…

A: The oxidase test is a biochemical test that is used to determine the presence of an enzyme called…

Nutrient Growth Medium

It is a culture medium or nutrient broth for all kinds of microorganisms to grow properly and create their colony. This matrix provides support to increase the population of microbes through the method of cell proliferation. It is regarded as the food material for those organisms. It is a type of in vitro mechanism, in which the development of life is processed outside the host body. It can be solid, semi-solid, or liquid in nature. Different kinds of cells develop in different types of media.