Why is penicillin more effective on Gram positive?

Q: What gram-positive bacterium can give a positive presumptive test?

A: In microbiology, the presumptive test is used to find out the presence of gas-forming lactose…

Q: Why 10% bleach disinfectant are most against probiotic?

A: Disinfectant is a chemical liquid that destroys bacteria,  thereby causing disinfection.

Q: Is the all Staphylococcus species are gram positive?

A: Microbiology is the branch of science that deals with the study of microorganisms that are too small…

Q: Why is it important to limit the quantity of cells used to prepare a smear?

A: A thin layer of cells or tissues that are taken from the body of an organism under study which is…

Q: How does one can differentiate Streptococcus pyogenes from Staphylococcu

A: Answer is given below

Q: Considering that Staphylococcus epidermidis does not typically cause disease in a healthy person,…

A: Plasmids are small, self-replicating, extrachromosomal, circular double stranded DNA molecules…

Q: How did Georg Gaffky cultured Salmonella Typhi?

A: Salmonella enterica is a kind of bacteria. Typhoid fever is caused by a gram-negative bacteria…

Q: You have isolated a Gram positive cocci from a throat culture. You have determined that it is…

A: Gram-positive bacteria have a single cell wall anchored to the cell membrane by lipoteichoic…

Q: What is the differential agent in EMB medium? a. lactose  b. glucose c. phenol red

A: There are different media available for the growth of microorganisms: Basal media, enriched media,…

Q: What makes Mycobacterium resistant to staining?

A: Staining is a technique used in slide preparation to color the specimen.With light microscopy,…

Q: Why is the loop flamed before it is placed in a culture tube? Why is it flamed after completing the…

A: The term sterilization refers to any process that eliminates, kills, removes, or deactivates all…

Q: What color would you expect for a gram positive microorganism for each of his incorrect attempts?…

A: Gram staining is a technique which is used to identify the bacterial cell type, whether it is gram…

Q: What is the correct arrangement of the unknown bacterium growing on your MacConkey agar?

A: MacConkey agar (MAC) was the first solid differential media to be designed by Alfred Theodore…

Q: Where should a label be written on an agar plate?

A: The aseptic technique is applied in a laboratory setup to reduce the risk of contamination. It…

Q: What is culture media? Which culture media is used for gram negative bacteria and which one for gram…

A: Microbiology is the branch of science which deals with the study of different types microorganisms…

Q: How is the microbe that makes penicillin different from the one that makes streptomycin?

A: An antibiotic is a kind of antimicrobial substance dynamic against microbes. It is the main kind of…

Q: Which one of the following is the most resistant microorganism for sterilization: Select one: a.…

A: Microorganisms vary in their degree of susceptibility to disinfectants. Species such as Mycobacteria…

Q: what is the culture media for gram-positive bacteria?

A: The culture media for gram positive bacteria is Mannitol salt agar . The presence of bile salts, as…

Q: What structures are found on agar plates when the bacteriophage T4 has penetrated Escherichia coll?…

A: ANSWER;- Colonies

Q: How can a suspect bacterium be fingerprinted?

A: DNA fingerprinting is a technique for detecting a high number of minisatellites in the genome at the…

Q: What is the accepted theory regarding the mechanism of the Gram stain?

A: Bacteria on the basis of the structural organization of their cell wall are of two types:…

Q: Is there a relationship between Gram staining and sensitivity to various antibacterial compounds?…

A: Gram staining is a method to identify whether a bacteria is gram positive or gram negative based on…

Q: Why are the streak plates incubated at 7°C when selecting for psychrotrophic bacteria?

A: Bacteria are unicellular, prokaryotic organisms which are devoid of membrane bound organelles and a…

Q: erial slide agglutination technique important in diagnostic procedure?

A: Immunoassays are bioanalytical ways that use the specificity of an antigen-antibody reaction to…

Q: The culture primarily contains nutrients such as sugars and a gel (agar). Why don’t viruses grow in…

A: Culture media are an integral part of the microbiology lab. There are various kinds of media used in…

Q: Gram Stain is used to differentiate. O 1. Virus O 2. Onion Cells O 3. Blood Cells O 4. Bacteria

A: Microbial organisms occur below micron levels in their size. So to distinguish them properly we have…

Q: How does the bacterial cell structure contribute to the mechanism of Gram staining?

A: Bacteria are prokaryote organisms, that lack well-defined cell organeles and nuclei. Bacterial cell…

Q: you are given a mixed culture of S. aureus, E. coli and P. aeruglinosa. How would you isolate each…

A: In the study of microorganisms, a mixed culture is one that contains more than one type of organism…

Q: How does the agar dilution method differ from streaking toobtain isolated colonies?

A: Both these are methods to culture microorganisms and have their respective pro and cons as mentioned…

Q: what is the function of each one of the Gram-stain reagents?

A: Gram staining is the technique used to classify the bacterial species into broad groups based on the…

Q: What are some of the disadvantages of using natural penicillin for treatment of infections?

A: Antibiotics are antimicrobial substances that control or inhibit the growth of microorganisms,…

Q: What is the definition of Gram Positive?

A: When the stain combines with bacteria in a sample and  the bacteria will either stay purple or turn…

Q: It is expected that amoxicillin would be more effective against Gram-positive bacteria.  Explain…

A: Amoxicillin is a beta-lactam antibiotic that functions by attaching itself to the membrane proteins…

Q: Bacterial resistant is big problems, How to avoid such a problem?

A: Bacterial resistance means a bacteria is resistant to be killed from antibiotics or bactericidal or…

Q: how could you determine if there is any contamination on your agar?

A: Agar consists of two polysaccharides, agarose and agaropectin, but agarose making up about 70% of…

Q: How is the Gram stain used clinically to help identify the cause of an infection?

A: Gram stain or sometimes "Gram staining", likewise called Gram's method, is a technique for staining…

Q: Why can't gram staining be used for mycobacterium?

A: Gram staining is one of the staining techniques. This is usually used for differentiating between…

Q: If you notice on your agar plate that there are more than one color of colonies-- What does this…

A: A bacterial colony is what you Called a set of bacteria derived from the same mother cell. which…

Q: What is the Fluorochrome staining technique for Mycobacterium

A: Mycobacterium - they are a type of germ. There are different kind of mycobacterium. Still others…

Q: Why are agar plates incubated upside down?

A: The Petri dish has existed for over a decade, whereas simple, cell-growing equipment remains…

Q: what is the theory about the mechanism of the gram-stain reaction

A: Introduction :- A Gram stain test looks for bacteria in areas where an infection is thought to have…

Q: Which bacterial type ( Gram positive or Gram negative) is more sensitive to the antibiotic…

A: Penicillin is the group of antibiotics which were originally derived from the penicillium molds. It…

Q: Why is it so important to develop tests to ID bacteria

A: Answer: BACTERIA : These are the unicellular microorganisms, which are prokaryotic in nature.…

Q: Could a bacteria gram stain one way before infecting someone then gram stain the way after it has…

A: In medicinal microbiology, differential stains are to dye different cells to make them…

Q: Why does  nigrosin not stain the bacteria?

A: Nigrosin is an acidic stain, used in the negative staining technique. Staining is a part of…

Q: Why are aseptic techniques implemented during inoculation?

A: Aseptic means without contamination and Inoculation means transfer of a bacterial sample onto a…

Q: Abigail did not dry the top of her agar plate and stored it top up. Now she wants to count colonies…

A: Microorganisms are small organism that cannot be seen by naked eyes. Microorganism can be harmful to…

Q: What is the purpose of using the streak plate method?

A: Solution-  Introduction -  Streak plate technique is used  for the isolation into a pure culture of…

Bacterial Morphology

The bacteria are prokaryotic organisms that are single-celled, and are found to exist as free-living and possess a microscopic size. The morphology is found to vary in the bacteria, where some of them are identified as individual organisms and the others are detected as colonies. The size and shape of the bacterial cell also represent its morphology. 

Bacterial cell structure

Bacteria are single-celled, tiny creatures that may enter healthy tissues and grow rapidly. Bacteria are microscopic organisms that are tiny and unicellular. These are members of the prokaryote kingdom. They live in water, air, soil, and all-natural environments. They are used in industrial and therapeutic processes, and they support a wide range of plant and animal life. The first organism to appear on the planet. Bacteria-like creatures are the oldest known fossils. Bacteria can consume a wide range of organic and inorganic elements, and some may even survive in harsh conditions.