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

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

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter22: Prokaryotes: Bacteria And Archaea

Section: Chapter Questions

Problem 2VCQ: Figure 22.16 Which of the following statements is true? Gram-positive bacteria have a single cell...

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Which statement is false regarding bacterial cell walls? A. Both Gram positive and Gram negative bacteria contain peptidoglycan in the cell wallB. Gram negative bacteria have a thin layer of peptidoglycan and stain pinkC. Gram (+) bacteria are positively charged due to phosphate groups in teichoic acidsD. Gram (-) bacteria have an outer cell wall containing lipopolysaccharideE. Both teichoic acids and lipopolysaccharide can be used to separate bacterial species
Which of the following statement about the bacterial cell wall is INCORRECT? a. The cell wall is relatively nonpermeable and restricts the passage of sugars and amino acids. b. Gram-positive cells have more peptidoglycan in theircell walls than Gram-negative cells. c. Gram-negative cells have a membrane both inside andoutside their cell walls. d. The cell wall establishes a bacterium’s shape as a coccus,bacillus, or spirillum.
Describe the cross - section side view of a Gram - negative cell . Clearly state where the following would be located or write the letters in order of appearance from the outside to the inside . If any of these structures are not present , make sure to leave them out . A ) peptidoglycan ; ( B ) periplasm ; ( C ) porin ; ( D ) LPS ; ( E ) teichoic acids ; ( F ) plasma membrane : ( G ) outer membrane : ( H ) nucleoid
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.
What is the process to perform a Gram Stain? What happens if you make a mistake on a step (Think about different mistakes you could make)? What are the proper results? What structures do Archaeans use to attach to surfaces (Look like treble hooks)? What are bacterial inclusions? What are the similarities and differences in Gram - cells and Gram + cell structure? What is the function of ribosomes and what are they mad up of? What component of bacterial cells helps to combat/regulate osmotic forces? What are Koch’s postulates? What are they used for? Explain the process of endospore formation in endospore-producing organisms. What are the major components of the bacterial & eukaryotic cell? What is/are a pilus/pili and what do microbes use them for? What is the prokaryotic flagellum made up of?
You use the Gram staining procedure to stain a bacterium that lacks a cell wall. Would you consider the bacterium appear Gram positive or Gram negative ? And why?
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 is present in both gram-positive and gramnegativecell walls?a. an outer membrane. c. teichoic acidb. peptidoglycan d.lipopolysaccharides
Which of the following statements is true? Select one: O a. Gram-positive bacterial walls have a relatively thin layer of peptidoglycan anchored to the acids O b. Peptidoglycan is a fatty acid O c. The cell walls of bacteria are composed of peptidoglycan O d. Peptidoglycan is found mainly in the cell walls of fungi, algae and plants
An acid-staining method was performed on a bacterial smear using the dyes carboifuchsin and methylene blue. The resulting stained slide contained only cells that appeared blue when visualized using a microscope. Which of the following couid explain why only blue cells were present?
start with the results of your Gram Stain. In the spaces labeled appearance& observations, indicate what you see. For instance, "red, long, rod-shaped cells." Under Results indicate the correct term that goes along your observation. For the gram stain, it is sufficient to write the word "positive" or negative in this space.
Why do low concentrations of alcohol inhibit Gram-negative bacteria more than Gram-positive bacteria? Explain how the alcohol interacts with: 1) Gram-negative cell wall structures 2) Gram-positive cell wall structures