Which of the following statements is a reason why Acid-Fast Bacteria resist the ?Gram stain Because their cell wall architecture varies from both gram-negative and gram-positive bacteria. Because they lack the peptidoglycan layer. Because they have a thick peptidoglycan layer. Because they have a thick layer of fatty acids.

Which of the following statements is a reason why Acid-Fast Bacteria resist the ?Gram stain Because their cell wall architecture varies from both gram-negative and gram-positive bacteria. Because they lack the peptidoglycan layer. Because they have a thick peptidoglycan layer. Because they have a thick layer of fatty acids.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter13: Diversity Of Microbes, Fungi, And Protists

Section: Chapter Questions

Problem 1ACQ: Figure 13.6 Which of the following statements is true? a. Gram-positive bacteria have a single cell...

See similar textbooks

Similar questions

Which of the following is true about cell wall of gram-positive bacteria? O Not loss primary stain after alcohol O It consists of multiple peptidoglycan layer O Option 5 O It is thicker than that associated with gram-negative bacteria. All of these
Several students argued about why Gram-positive cells stain purple with the Gram stain whereas Gram-negative cells stain pink. Which explanation is correct? Multiple Choice Alcohol dehydrates peptidoglycan; the thick layer of dehydrated peptidoglycan in Gram-negative cells prevents the crystal violet from being washed out Safranin stains lipopolysaccharide, and because only Gram-negative cells have lipopolysaccharide, those cells look pink. Safranin stains lipopolysaccharide, and because only Gram-negative cells have lipopolysaccharide, those cells look pink. Alcohol dehydrates peptidoglycan; the thick layer of dehydrated peptidoglycan in Gram-positive cells prevents the crystal violet from being washed out. Crystal violet specifically stains peptidoglycan, and because Gram-positive cells have a thicker peptidoglycan layer those cells look purple. Alcohol destroys lipopolysaccharide in Gram-negative cell walls, allowing safranin to enter the cells and staining them pink.
Microbiologists use the Gram stain to differentiate among two groups of bacteria. How do Gram-positive and Gram-negative bacteria differ? Question 1 options: the presence or absence of peptidoglycan in the cell wall the presence or absence of muramic acid in the cell wall the presence or absence of outer plasma membrane the lipid composition of plasma membrane none of the above.
Bacteria in the phylum Firmicutes are distinguished from the phylum Actinobacteria on the basis of their spiral shapes. the presence of LPS in their membranes. their Gram stain reaction. the low G + C content of their DNA. the high G + C content of their DNA.
out Gram positive cells have a much thicker layer of than Gram negative cells. chitin O cellulose O periplasmic space O peptidoglycan
Porins allow for the transport of material (e.g. nutrients) through the of Gram cell wall
You conduct a gram stain on a bacterial culture. After counterstaining with safranin, cells are purple. What statements are true about the bacterial cells? (Choose all that are true.) Group of answer choices The cell wall of these cells helps to maintain cell shape and protect the cell from osmotic lysis. The cells have teichoic acids that have many important functions in gram positive bacteria Cells have a periplasmic space and a thin layer of peptidoglycan. The cells produce endotoxin (LPS) and may cause septic shock in an infected individual.
Which of the following statement about 3 bacterial cell wall is incorrect Peptidoglycan consists of long polysaccharide chainscross-linked with amino acids. The cell wall establishes a bacterium as a coccus, bacillus, or spirillum. The cell wall is relatively nonpermeable and restricts the passage of sugars and amino acids. Gram- negative cells have a membrane both inside andoutside their cell walls. Gram-positive cells have more peptidoglycan in their cell walls gram-negative cells
Which of the following statement/s is/are true about gram negative bacteria Cell wall has thin peptidoglycan layer Cell wall lipid content is very low Lipopolyscharride layer is present All of the above
Which of the following statements is incorrect regarding Gram negative bacteria Select one: O a. Lipopolysaccharide layeris present Ob. All of the mentioned above O c. Cell wall lipid content is very low O d.Cell waIlhas a thin peptidoglyean layer
Mycoplasmas are bacteria that lack cell walls. On the basis of this structural feature, which statement concerning mycoplasmas should be true? They are gram-negative. They are subject to lysis in hypotonic conditions. They lack a cell membrane as well. They should contain less cellulose than do bacteria that possess cell walls. They possess typical prokaryotic flagella.
Which one of the following statements about the Gram stain is false? A-In the Gram stain, a dye called crystal violet is used to stain the cells purple. B-Gram positive cells end up being stained purple. C-Gram negative cells have thinner peptidoglycan layers than Gram positive bacteria. D-In the Gram stain, alcohol is used to kill the bacteria E-Gram negative cells end up being stained pink or red.