Growth of microbes in a solid media is identified by the formation of? a) Pellicle at the top of media b) Colonies c) Sediment at the bottom d) Turbidity

Q: Which of the following is NOT a chemical method of microbial control? a) refrigeration b) ethyl…

A: In order to stop the spread of infections and diseases, microbes must be under control. Thereby…

Q: enrichment culture to isolate aerobic and anaerobic nitrogen-fixing bacteria, sulfate-reducing…

A: Enrichment culture:  This type of culture containing  certain growth media ,allows  and  favours the…

Q: When hydrogen peroxide is placed on a colony of an unknown bacterium, bubbles form. Based on this…

A: Correct option is, (d) Is catalase-positive.

Q: Why would farmers be concerned about nitrifying bacteria?

A: Nitrifying bacteria are a small group of aerobic bacteria belonging to the family Nitrobacteraceae…

Q: Most human bacterial pathogens are labeled as __ according to their temperature requirement: a)…

A: Microorganisms known as mesophiles thrive in habitats with moderate temperatures, often between 20°C…

Q: Describe the basic process of biofilm formation.

A: Biofilm refers to the collective growth of microorganisms on different surfaces. The microorganisms…

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: All bacteria produce spores. a) Trueb) False

A: Bacteria are the most important microorganisms to the food processor. Some bacteria are beneficial…

Q: Which of the following is not a matching pair?a) Potable water—presence of pathogensb) High BOD—high…

A: Filamentous bulking refers to the uncontrolled growth of filamentous bacteria. Primary treatment…

Q: You perform a Gram staining technique on two bacterial species and observe that one is stained…

A: Gram staining is a technique used to differentiate between two groups of bacteria namely…

Q: A specimen transferred onto a fresh agar plate is initially in which phase of bacterial growth?

A:

Q: In the exponential phase of microbial growth, Log cell numbers Time 1 1 1 1 1 1 I 1 1 a) net cell…

A: Microbial growth curveThe microbial growth curve shows the pattern of microbial growth.There are…

Q: The sediment observed in stained blood smear caused by: a) Overstraining b) More Haematoxylin in the…

A: Here we have to explain about why sediment observed in stained blood smear.

Q: Blood agar media  is a _________.   Selective media Differential media Rich media Enriched media…

A: A medium can be defined as gel or liquid which helps in growth of a bacterial culture. Medium is…

Q: Is it acceptable to give a formal name to a microbe that hasn't been isolated and cultivated? What…

A: There are two main microbiology methods used for isolating bacteria from a clinical sample in order…

Q: Which bacteria are inhibited from growing on eosin methylene blue (EMB) and agar? a)halophilic…

A: EOSIN METHYLENE BLUE  - eosin methylene blue is a selective strain for gram - negative bacteria . It…

Q: Which of the following is often added to wine to inhibit growth of the natural microbial populations…

A: Wine production:                        In red wine, the role of malolactic fermentation act as a…

Q: egorise the microbial growth into four phases. In your own words, briefly describe eac

A: An organism that is microscopic is known as the microorganisms. These are tiny , small organisms…

Q: Which of the following methods of control kills the microbe? a) incineration b) desiccation c)…

A: Introduction Microorganisms are referred to as that organism that is single-celled and can only be…

Q: Endospores are     a) resistant to extreme temperatures     b) produced by some prokaryotes…

A: Some bacteria of phylum Firmicutes produce a non-reproductive, tough, and a dormant structure called…

Q: You inoculated two tubes of liquid cuture media with 100 bacterial cells and incubated one tube at…

A: "Microbiology" is the study of microorganisms and associated topics. Microbiology has gone a long…

Q: A selective media  a) inhibit the growth of certain bacteria while allowing others to grow b)…

A: An example of selective media includes- eosin methylene blue that is toxic to Gram-positive bacteria…

Q: Biofilms represent an important environmental niche. A) How does growth on a surface differ from…

A: Biofilm is the aggregation of microbes on an inanimate surface or any living surface. They first…

Q: Agar is extracted froma) Fungib) Bacteriac) Algaed) Virus

A: Agarose and agaropectin are known to combine together to form agar. This jelling substance naturally…

Q: When a medical technologist wants to determine if a clinical specimen contains a Mycobacterium…

A: Answer is a.) Acid -fast stain.

Q: What are the requirements to support microbial growth?

A: Microbial growth refers to growth (increases in the number of cells) of a microbial population. In…

Q: The use of sterile techniques and agar media enables microbiologists to study: a) Bacterial growth…

A: Agar is a polysaccharide composed of agarose and agaropectin. It is a gelatinous substance used in…

Q: What is a generally minimum pH for growth and toxin production by Clostridium botulinum and other…

A: Clostridium botulinum is a Gram-positive, rod-shaped, anaerobic, spore-forming, motile bacteria that…

Q: Bacteria use the following mechanism(s) to resist antibiotics:

A: Antibiotic resistance Antibiotic are the class of compounds that inhibits the growth of bacteria or…

Q: The autoclave uses a combination of ___ to accomplish its function: a) temperature and pressure b)…

A: a) temperature and pressureExplanation:An autoclave is a widely used device in various fields,…

Q: What is the difference between defined media and complex media?

A: media is a solution in which is rich in nutrients.  it is very suitable for the growth of microbes…

Q: Thermoplasma and Picrophilus grow best in which of the following extreme conditions?a) Low pH     b)…

A: Answer is d.) a and c.

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: Explain 2 factors that influence microbial growth.

A: The growth of microorganisms  are very much dependent on different factors that controls the growth…

Q: What is differential medium and differential media? Explain the difference ?

A: Difference between differential medumium -   .- A differential medium support the expansion of any…

Q: Diseases that involve biofilm-producing bacteria are of serious concern. They are not as easily…

A: A biofilm is thin but a robust layer of mucilage , adhered to a surface like human skin , tooth ,…

Q: Benzoic acid is an antimicrobial chemical naturally found inwhich of the following foods?a) Apples…

A: The unicellular minute organisms which are not visible from the naked eye are known as microbes.…

Q: Which process converts ammonium (NH4+ ) into nitrate (NO3− )?a) Nitrogen fixationb) Ammonificationc)…

A: Nitrite removal is even easier, with nitrite being oxidized by the enzyme nitrite oxidoreductase and…

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: Microbes have their biggest impact in which step of wastewater treatment? A) O preliminary B) O…

A: Wastewater treatment as the term suggests is the treatment of the sewage water in order to eliminate…

Q: Which of the following is correct about biofilms? O 1) They are comprised only of psychrophiles. O…

A: Biofilms are collective group of organisms that grow together on different surfaces. Bacteria,…

Q: Strict anaerobes cannot live in the presnece of oxgyen because: a.)they have to mitochondria…

A: Cell biology is the investigation of cell design and capacity, and it spins around the idea that the…

Q: Write a paragraph explaining the Gram stain result and the differences in the endospores of these…

A: The Gram staining procedure is used to classify bacterial species into two broad groups namely…

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."