Homework Answers
Gram positive bacteria : Gram-positive bacteria takes the colour of crystal violet stain in the Gram stain. This is characteristic of bacteria that have a cell wall composed of a thick wall of a particular substance called peptidologlycan.
Gram negative bacteria : Gram negative are the bacteria that do not take the crystal violet stain used in the Gram staining method for bacterial differentiation.
According to first picture:
1. Yes , the first picture is Gram positive bacteria because it gave positive response(purple colour) in Gram stain test. So, it is Gram positive bacteria .
2. The Gram positive bacteria are all rod shaped.
3. The Gram positive bacteria arranged in chains like structure .
According to second picture :
1 . Yes , the secoy picture is Gram negative bacteria because it not gave any positive response(pink colour) in Gram stain test . So it is Gram negative bacteria .
2. The Gram negative bacteria are coccus type.
3. The Gram negative bacteria may exist as single cell or remain attached to each other.
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Answer the following questions for each picture : 1) is it gram negative or gram positive?...
Answer the following questions for each picture: 1) is it gram negative or gram positive? 2)...
Answer the following questions for each picture: 1) is it gram negative or gram positive? 2) Is the shape rod or coccus? 3) is the arrangement chains or single?
1. The Gram reaction; Gram Positive or Gram Negative 2. The shape of the cells; bacillus,...
1. The Gram reaction; Gram Positive or Gram Negative 2. The shape of the cells; bacillus, coccus, spiral 3. The typical arrangement of the cells; single, pairs, clusters, chains etc. Shape of cells Arrangement of cells Name of organism Gram Reaction Bacillus cereus Enterobacter aerogenes Enterococcus durans Escherichia coli Micrococcus luteus Senatra marcescens Staphylococcus epidermidis streptococcus Salivarius Klebsiella pmeumonia Salmonella entertidis Shigella Sonnei Staphylococcus aureus Streptococcus pyogenes *Hint: The organisms used in the Lab. are listed in the Safety Guidelines...
The image below shows which of the following? O Gram positive coccus O Gram negative coccus...
The image below shows which of the following? O Gram positive coccus O Gram negative coccus O Gram positive bacillus Gram positive spirila O Gram negative spirila
Use the dichotomous key below to find a Gram-negative organism that is oxidase negative, does not...
Use the dichotomous key below to find a Gram-negative organism that is oxidase negative, does not produce acid from lactose, and is urease negative. Staphylococcus . Micrococcus Streptococcus . Lactobacillus 1. Gram-positive A. Catalase+ 1. Acid from glucose... 2. Glucose- B. Catalase 1. Coccus. 2. Rod. II. Gram-negative A. Oxidase- 1. Acid from lactose a. Uses citric acid.. b. Citric acid 2. Lactose- a. Urease positive. b. Urease negative B. Oxidase 1. Rod. 2 Coccus Citrobacter Escherichia Proteus Salmonella Pseudomonas...
My unkown's for this assignment were S. Salvirius (Gram positive) and H. Alvei (Gram negative), can you...
My unkown's for this assignment were S. Salvirius (Gram positive) and H. Alvei (Gram negative), can you help answer the questions on this assignment? Observed Macroscopic and Microscopic Characteristics of Each Unknown Gram Reaction Cellular Morphology Cellular Arrangement Colony Morphology G+ G−
QUESTIONS Predict the effect on Gram-positive and Gram-negative cells of the following mistakes made when performing...
QUESTIONS Predict the effect on Gram-positive and Gram-negative cells of the following mistakes made when performing a Grum stain. Consider cac mistake independently a. Failure to add the iodine. b. Failure to apply the decoloriser. 3 c. Failure to apply the safranin. d. Reversal of crystal violet and safranin stains. Both crystal violet and safranin are basic stains and may be used to do simple stairs on Gram-positive and Gram-negative cells. This being the case, explain how they end up...
Describe the color of Gram positive and Gram negative bacteria in each step of the Gram...
Describe the color of Gram positive and Gram negative bacteria in each step of the Gram staining procedure. (Be sure to account for the procedure, the reagent, and the colors of Gram negative and Gram positive bacteria in your description.)
1) Is Bacillus subtilis bacteria gram positive or negative? 2) Is Bacillus subtilis capsule - or...
1) Is Bacillus subtilis bacteria gram positive or
negative?
2) Is Bacillus subtilis capsule - or + ?
3) Does Bacillus subtilis has motile?
4) What is the morphology and arrangement of Bacillus
subtilis?
QUESTIONS 1) Are acid fast cells gram positive or gram negative? Explain why it might be...
QUESTIONS 1) Are acid fast cells gram positive or gram negative? Explain why it might be difficult to determine the Gram reaction of acid fast cells. 2) What is the significance of the mycolic acid layer in the following contexts? A) To bacteria for survival and infection B) During the acid fast staining procedure QUESTIONS 1) What is the difference between a pure culture and a pure colony? Is a streaking for isolation plate a pure culture when your original...
Gram-positive and gram-negative bacteria differ in that A. Gram-positive bacteria have more peptidoglycan in their cell...
Gram-positive and gram-negative bacteria differ in that A. Gram-positive bacteria have more peptidoglycan in their cell walls. B. Gram-positive bacteria have fimbriae but gram-negative bacteria do not. C. Gram-positive bacteria are spiral-shaped, and gram-negative bacteria are either rod-shaped or spherical. D. Only gram-negative bacteria can form endospores. E. There is no difference between gram negative and gram positive bacteria F. Gram positive are positively charged and gram negative are negatively charges An unknown bacterial species was found in the blood...
Answer the following questions for each picture: 1) is it gram negative or gram positive? 2) Is the shape rod or coccus? 3) is the arrangement chains or single?
1. The Gram reaction; Gram Positive or Gram Negative 2. The shape of the cells; bacillus, coccus, spiral 3. The typical arrangement of the cells; single, pairs, clusters, chains etc. Shape of cells Arrangement of cells Name of organism Gram Reaction Bacillus cereus Enterobacter aerogenes Enterococcus durans Escherichia coli Micrococcus luteus Senatra marcescens Staphylococcus epidermidis streptococcus Salivarius Klebsiella pmeumonia Salmonella entertidis Shigella Sonnei Staphylococcus aureus Streptococcus pyogenes *Hint: The organisms used in the Lab. are listed in the Safety Guidelines...
The image below shows which of the following? O Gram positive coccus O Gram negative coccus O Gram positive bacillus Gram positive spirila O Gram negative spirila
Use the dichotomous key below to find a Gram-negative organism that is oxidase negative, does not produce acid from lactose, and is urease negative. Staphylococcus . Micrococcus Streptococcus . Lactobacillus 1. Gram-positive A. Catalase+ 1. Acid from glucose... 2. Glucose- B. Catalase 1. Coccus. 2. Rod. II. Gram-negative A. Oxidase- 1. Acid from lactose a. Uses citric acid.. b. Citric acid 2. Lactose- a. Urease positive. b. Urease negative B. Oxidase 1. Rod. 2 Coccus Citrobacter Escherichia Proteus Salmonella Pseudomonas...
QUESTIONS Predict the effect on Gram-positive and Gram-negative cells of the following mistakes made when performing a Grum stain. Consider cac mistake independently a. Failure to add the iodine. b. Failure to apply the decoloriser. 3 c. Failure to apply the safranin. d. Reversal of crystal violet and safranin stains. Both crystal violet and safranin are basic stains and may be used to do simple stairs on Gram-positive and Gram-negative cells. This being the case, explain how they end up...
Describe the color of Gram positive and Gram negative bacteria in each step of the Gram staining procedure. (Be sure to account for the procedure, the reagent, and the colors of Gram negative and Gram positive bacteria in your description.)
1) Is Bacillus subtilis bacteria gram positive or
negative?
2) Is Bacillus subtilis capsule - or + ?
3) Does Bacillus subtilis has motile?
4) What is the morphology and arrangement of Bacillus
subtilis?
QUESTIONS 1) Are acid fast cells gram positive or gram negative? Explain why it might be difficult to determine the Gram reaction of acid fast cells. 2) What is the significance of the mycolic acid layer in the following contexts? A) To bacteria for survival and infection B) During the acid fast staining procedure QUESTIONS 1) What is the difference between a pure culture and a pure colony? Is a streaking for isolation plate a pure culture when your original...
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