course hero which of the following is an example of a biofilm?

Which direction does a bacterium run in a nutrient solution?

What is a color layer?

What is the fertility plasmid?

Which organisms have a thick layer of peptidoglycan in their cell wall?

Why do cells retain primary stain?

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What is an example of a biofilm?

Plaque that forms on teeth is an example of a biofilm. Most bacteria are capable of forming biofilms. However, certain species have more of a disposition toward biofilms than others. In addition to plaque-forming bacteria on teeth, streptococci staphylococci, and lactobacilli also frequently form biofilms.

What is a biofilm quizlet?

What is a biofilm? Organized communities of bacteria that adhere to a surface surrounded by a mesh like matrix of extracellular polymeric substances (EPS) - often contains single bacterial species but can contain hundreds.

What are the types of biofilm?

Many different bacteria form biofilms, including gram-positive (e.g. Bacillus spp, Listeria monocytogenes, Staphylococcus spp, and lactic acid bacteria, including Lactobacillus plantarum and Lactococcus lactis) and gram-negative species (e.g. Escherichia coli, or Pseudomonas aeruginosa).

What is in a biofilm?

A biofilm is composed of attached microbial cells encased within a matrix of extracellular polymeric secretions (EPS), which surround and protect cells. The EPS matrix is typically composed of polysaccharides, proteins, lipids, and extracellular DNA (eDNA).

Which of the following is an example of a biofilm quizlet?

Which of the following is an example of a biofilm? Bacteria growing in plaque.

Where is biofilm found quizlet?

Where is biofilm found? on any solid surface that is wet or moist.

Which of the following is not an example of a biofilm?

Which of the following is NOT an example of a biofilm? Slime found on an asparagus is NOT an example of a biofilm.

Which of the following is true of biofilms?

The biofilms contain microorganisms that attach themselves to a surface. They can be formed on the surface of living organisms. They can also be found on the surface of non-living things. Therefore, the correct option is (B).

Is saliva a biofilm?

Salivary biofilm, coating the surface of the restorative material, significantly decreased sucrose-dependent adhesion of Streptococcus sobrinus and Streptococcus mutans to the bleached and non-bleached surfaces, compared to non-coated specimens (p < 0.05). Saliva had a minor effect on adhesion of Actinomyces viscosus.

Why do biofilms form quizlet?

Biofilms are communities of microorganisms enmeshed in a matrix of extracellular polymeric substance. The formation of a biofilm occurs when planktonic cells attach to a substrate and become fixed.

Which bacteria can form biofilms?

Both gram-positive and gram-negative bacteria can form biofilms on medical devices, but the most common forms are Enterococcus faecalis, Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus viridans, E. coli, Klebsiella pneumoniae, Proteus mirabilis and Pseudomonas aeruginosa [7].

Are biofilms one type of bacteria?

A biofilm community can be formed by a single bacterial species, but in nature biofilms almost always consist of rich mixtures of many species of bacteria, as well as fungi, algae, yeasts, protozoa, other microorganisms, debris and corrosion products.

What are biofilms quizlet Chapter 27?

- A biofilm is the sticky layer surrounding a bacterial cell wall. - Biofilms are cooperative colonies of bacteria.

What are biofilms made up of quizlet?

Biofilms are the accumulation of thousands of bacteria communicating and working together for the survival of their colony.

What is a biofilm and what role does biofilm play in disease quizlet?

Biofilm is a thin but robust layer of mucilage adhered to a solid surface that contains bacteria and other microorganisms. They are responsible of many diseases in humans because they are resistant to antibiotics and defense systems, which make it hard to cure.

What is a bacterial biofilm considered quizlet?

Biofilms. Communities of bacteria adhered to a surface surrounded by a matrix of Extracellular Polymeric Substances.

Which direction does a bacterium run in a nutrient solution?

d. The bacterium will run in a straight direction all the way to the nutrient solution.

What is a color layer?

a. Colored layers of threadlike structures surrounding the cell

What is the fertility plasmid?

A cell contains a fertility (F) plasmid that allows it to produce a structure for exchanging DNA with another cell. What structure is coded for by the genes of this plasmid?

Which organisms have a thick layer of peptidoglycan in their cell wall?

thermophiles. Gram-positive organisms have a thick layer of peptidoglycan in their cell wall. This differs from gram-negative organisms which have a relatively thinner layer of peptidoglycan in comparison, covered by a hydrophobic LPS layer. This difference forms the basis of the Gram staining procedure.

Why do cells retain primary stain?

with their thick layer of peptidoglycan, retain the primary stain because the large dye complexes are inaccessible, and the cells remain purple .

Which direction does a bacterium run in a nutrient solution?

d. The bacterium will run in a straight direction all the way to the nutrient solution.

What is a color layer?

a. Colored layers of threadlike structures surrounding the cell

What is the fertility plasmid?

A cell contains a fertility (F) plasmid that allows it to produce a structure for exchanging DNA with another cell. What structure is coded for by the genes of this plasmid?

Which organisms have a thick layer of peptidoglycan in their cell wall?

thermophiles. Gram-positive organisms have a thick layer of peptidoglycan in their cell wall. This differs from gram-negative organisms which have a relatively thinner layer of peptidoglycan in comparison, covered by a hydrophobic LPS layer. This difference forms the basis of the Gram staining procedure.

Why do cells retain primary stain?

with their thick layer of peptidoglycan, retain the primary stain because the large dye complexes are inaccessible, and the cells remain purple .