What color do you expect a Gram-positive cell to be at each step of the Gram...

What color do you expect a Gram-positive cell to be at each step of the Gram staining procedure? Why?

What color do you expect a Gram-negative cell to be at each step of the Gram staining procedure? Why?

Solutions

Expert Solution

	Colour of gram positive bacteria	Colour of gram negative bacteria
1st step, addition of crystal violet stain	Crystal Violet is the Purple coloured stain and therefore the bacteria turns purple	same as Gram Positive Bacteria
2nd step, addition of iodine	Crystal Violet iodine Complex are formed which are trapped in the mesh work of peptidoglycan layer and the bacteria appears purple	same as Gram Positive Bacteria
3rd step, addition of alcohol	Crystal Violet iodine complexes are not washed off from the cell because peptidoglycan is thick and the bacteria is still purple	Crystal Violet iodine complexes are washed off and bacteria appears Colourless
4th step, addition of safranine	Gram Positive Bacteria is still purple and will remain purple	Gram negative bacteria was colourless and now it will appear red

Please rate high.

gladiator answered 2 years ago

Next > < Previous

Related Solutions

Describe the color of both gram-positive and gram-negative cells after each of the four steps in...

Describe the color of both gram-positive and gram-negative cells after each of the four steps in the gram staining method (not including rinsing with water). Why does alcohol easily decolonize gram negative bacteria, but not those that are gram-negative? How are the results of a gram stain important in prescribing a treatment for a bacterial information?

For each type of cell wall in bacteria (gram positive vs. gram negative ) describe the...

For each type of cell wall in bacteria (gram positive vs. gram negative ) describe the unique components present in each and list how each layer of the cell wall is connected together ( what molecules accomplish this)?

1)What color would a Gram-negative cell be if we skipped the iodine? What color would a...

1)What color would a Gram-negative cell be if we skipped the iodine? What color would a Gram-positive cell be if we skipped the same step? Why? 2)Are all bacteria either Gram-positive or Gram-negative? If not, what is an example of a different type of bacteria? How does it differ from a Gram-positive/negative cell?

Choose one antibiotic that you would expect to show different effects on Gram-positive and Gram-negative bacteria....

Choose one antibiotic that you would expect to show different effects on Gram-positive and Gram-negative bacteria. Which bacterium is more susceptible? Why do you think this might be the case?

What are the differences in cell envelope structure between gram-negative and gram-positive bacteria? How might these...

What are the differences in cell envelope structure between gram-negative and gram-positive bacteria? How might these differences become important if you wish to genetically engineer bacteria to excrete proteins into the extracellular fluid?

On which type of agar might you expect to see good growth of a gram positive...

On which type of agar might you expect to see good growth of a gram positive bacteria species? Blood agar MacConkey agar Hektoen enteric agar All of the above

Describe the structure of the cell envelope of a gram-positive bacteria and compare it with that...

Describe the structure of the cell envelope of a gram-positive bacteria and compare it with that of a gram-negative bacteria. Give detailed answer.

Explain the differences between Gram positive bacteria wall and Gram negative bacteria cell wall.

1) Create a chart that compares and contrasts the structure of gram-positive and gram-negative cell walls....

1) Create a chart that compares and contrasts the structure of gram-positive and gram-negative cell walls. 2) Gram negative bacteria are considered more harmful than gram positive bacteria.What are the two reasons that contribute to this situation due to the unique characteristic of the outer membrane of Gram-negative bacteria? (Minimum length : 150 words)

Describe the difference between gram-positive and gram-negative bacterial cell walls. Explain which stains bind to gram...

Describe the difference between gram-positive and gram-negative bacterial cell walls. Explain which stains bind to gram positive and which ones bind to gram negative cells. Which of these bacteria is more susceptible to antibiotics and why?

Subjects