2) Why do some bacteria species give a Gram positive reaction whereas other species give a Gram negative reaction? Explain.

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: 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: What does a positive h2s test result of your first test tell you about the biological and/or…

A: 1. In a positive hydrogen sulphide test, hydrogen sulphide evolved forms a black iron sulfide…

Q: List 5 physical factors required for bacterial growth.

A: An increase in the number of bacteria in a population is referred to as bacterial growth. It is the…

Q: Gram psotive bacteria contains a tick peptidoglycan layer and an outer membrane.  a) True b) False

A: Gram positive bacteria give a positive result in Gram staining test. This test is used to classify…

Q: What are the four most important differences between the average bacterium and the average animal?

A: Here are four key differences between the average bacterium and the average animal: 1. Cellular…

Q: Why are endospore forming bacteria commonly found in soil?

A: A bacteria is a cell which is susceptible to a variety of environmental stress. Any environmental…

Q: What effect does decreasing the incubation temperature have on bacterial growth rate? Why?

A: Bacterial growth is proliferation of bacterium into two daughter cells, in a process called binary…

Q: Which disinfectant is the most effective? and why? Which disinfectant(s) is (are) bactericidal? and…

A: Disinfectant A is most effective as  there is no growth of salmonella choleraesuis at dilution 1:2…

Q: How can you make bacteria competent?

A: The word 'competence' refers to the ability of a cell to alter its genetics by taking up…

Q: If a bacterial culture is started with 50 cells, what will be the cell number after four…

A: Cultured bacteria are any bacteria that grow in the lab by the microbiologist using the required or…

Q: Which statement among A -D is false? A) O Active transport processes allow a bacterium to maintain…

A: Membrane permeability is an important aspect for the cells to survive. A semipermeable cytoplasmic…

Q: What component of bacterial cells helps to combat/regulate osmotic forces?  2. What are Koch’s…

A: Bacteria are one of the most common and versatile organisms on Earth. Their small size, ability to…

Q: Mannitol salt agar is a selective media that inhibits the growth of Gram-negative bacteria due to…

A: A Growth medium is an environment created by combining various nutrients that support the growth of…

Q: Describe what happens in an E. coli bacterium that has been living on the top of your ridge for the…

A: We have a diverse set of microorganisms around us that make our environment. These can be pathogenic…

Q: 8. Pigment or color (e.g.: opaque, translucid, red, yellow, rose, violet, etc..) is also another…

A: while culturing bacteria , there are certain bacteria which can produce pigments . these pigments…

Q: How do I tell whether or not a bacteria is gram + or gram - ?

A: Gram staining is a simple technique, in which a bacterium can be identified and categorized under…

Q: Bacterium Z had the lab results below. What can you tell me about the protein metabolism of this…

A: Bacteria are much the same as other life forms so far as proteins are concerned — they contain…

Q: A group of bacteria are gram stained. They show up as pink. Which bacteria group is most likely…

A: Gram-staining is a technique which is used to differentiate between two types of bacteria on the…

Q: Gram-negative bacteria are generally more resistant to antibiotics than Gram-positive bacteria. What…

A: Gram positive and gram negative bacteria has some structures in common whereas some structure differ…

Q: What are two advantages that a motile bacteria has over non motile?

A: Motile refers to moving ability. It means that any substance that may move from one spot to the next…

Q: chemical(s) best at inhibiting both Gram- negative and Gram-positive bacteria [Choose ] [Choose ]…

A: Hi! Thanks for your question. As you have posted multiple questions and have not mentioned which one…

Q: Do you think that a Gram negative or Gram positive bacteria would be more negatively affected by a…

A: Introduction: The intricate multilayered structure of a bacterial cell envelope serves to shield…

Q: 3a. How can the Gram stain be used to classify bacteria?  b) What causes one type of bacteria to…

A: Staining technique is a technique which uses different types of dyes ( acidic and basic dyes ) to…

Q: For a bacterium that prefers a neutral pH and has an optimal (best) growth pH of 7, how would growth…

A: The optimum pH for the growth of microbes is the favorable pH for that organism. The lowest pH value…

Q: Is the fluid inside a bacterial cell considered a solution, acolloid, or both? Explain.

A: Suspensions and colloids are mixtures whose properties are in many ways intermediate   A suspension…

Q: 39 You perform a Gram stain and when you look down the microscope see the image shown. You can…

A: Bacteria contain a cell wall that is made up of peptidoglycan. Depending upon the nature of the cell…

Q: 11. Complete this diagram with these three species: Escherichia coli, Enterobacter aerogenes, and…

A: A dichotomous key is a visual tool. As the name suggests, at each stage of the key, there is one…

Q: Explain the reason that the obtained organism is either a bacterium or eukaryotes.

A: The reason that the obtained organism is either a bacterium or eukaryotes

Bacterial Genomics

The study of the morphological, physiological, and evolutionary aspects of the bacterial genome is referred to as bacterial genomics. This subdisciplinary field aids in understanding how genes are assembled into genomes. Further, bacterial or microbial genomics has helped researchers in understanding the pathogenicity of bacteria and other microbes.

Transformation Experiment in Bacteria

In the discovery of genetic material, the experiment conducted by Frederick Griffith on Streptococcus pneumonia proved to be a stepping stone.

Plasmids and Vectors

The DNA molecule that exists in a circular shape and is smaller in size which is capable of its replication is called Plasmids. In other words, it is called extra-chromosomal plasmid DNA. Vectors are the molecule which is capable of carrying genetic material which can be transferred into another cell and further carry out replication and expression. Plasmids can act as vectors.