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Why are basic dyes needed to stain bacteria? a. They are negative in charge b. Nigrosin...
dyes, such as phenol red or methylene blue used in differential media? Why are dyes, such...
dyes, such as phenol red or methylene blue used in differential media? Why are dyes, such as A. to inhibit motility B. to stain microbes C to kill bacteria D. to see microbes to detect pH changes due to metabolism What is the purpose of differential medias to encourage growth of the desired bacteria B to isolate few bacteria to observe metabolism of the bacteria D. to stain bacteria E to determine motility 10 Why does Staphylococcus aureus turn yellow...
QUESTION 15 Why is crystal violet used in the Gram stain retained in the cell wall...
QUESTION 15 Why is crystal violet used in the Gram stain retained in the cell wall of Gram positive bacteria, but not in Gram negative bacteria? Gram positive bacteria have a thick peptidoglycan layer while Gram negative bacteria have a thin peptidoglycan layer. Gram positive bacteria form spores and Gram negative do not. O Gram positive bacteria have no peptidoglycan layer and Gram negative bacteria have a thick cell wall O Gram positive bacteria have capsules and Gram negative bacteria...
6) The Gram stain will stain bacteria on the basis of the chemistry of the: a)...
6) The Gram stain will stain bacteria on the basis of the chemistry of the: a) plasma membranes b) chromosomes c) cell wall d cytoplasmic proteins e) ribosomes 7) The Acid-Fast stain will stain bacteria on the basis of the chemistry of the a) plasma membranes b) chromosomes c) cell wall d) cytoplasmic proteins e) ribosomes 8) The morphology or shape of bacteria that are streptococcal or staphylococcal is dependant of the bacterial: a) cell wall b) plasma membrane c)...
need an explanation of how the gram stain is used and why it works. (this is...
need an explanation of how the gram stain is used and why it works. (this is not the gram stain procedure, but rather, how the dyes and steps work together to show Gram positive and Gram negative cell wall types)
microbiology QUESTION 7 Procedure for Differential Staining uses OA Two Basic Dyes OB. An Acidic Dye...
microbiology
QUESTION 7 Procedure for Differential Staining uses OA Two Basic Dyes OB. An Acidic Dye & a Basic Dye O C. Neutral dye with two colored ions O D. Acidic Dyes with contrasting colors QUESTION 8 commonly Both Clostridium species and Bacillus species types of bacteria are co OA Rod-shaped O B. Endospore-producers O C. Gram positive but older cultures appear negative O D. All of the above QUESTION 9 Both Mycobacterium tuberculosis and Coxiella burnetii are A. Gram...
43.Lipopolysaccharides (LPS) are found in: a. Gram-positive bacteria b. Gram-negative bacteria c. all Bacteria d. Archaea...
43.Lipopolysaccharides (LPS) are found in: a. Gram-positive bacteria b. Gram-negative bacteria c. all Bacteria d. Archaea e. Eukaryotes ------------------------- 44. There are similarities and differences between Gram-negative and Gram-positive bacteria. Which of the following is not true? a. The cell wall of Gram-negative cells is composed of only one or two layers of peptidoglycan whereas the cell walls of Grampositive bacteria have many peptidoglycan layers b. Only Gram-positive bacterial cells have a periplasm 2/6/18 8 c. The cell membranes of...
69. THE ENDOSPORE itself is might to stain_?_ color in an ACID FAST stain. (a) HOT...
69. THE ENDOSPORE itself is might to stain_?_ color in an ACID FAST stain. (a) HOT pink (c) purple (d) green (e) baby-blue 70. All STAINS begin with a properly prepared _?_ . (a) dye (b) slide (c) smear (d) dog (e) cat 71. Which of the following is an ENDOTOXIN found in some microbes? This is results in fever, blood vessel dilation and possibly SHOCK when it is released into the human blood stream? (a) the plasma membrane (b)...
Which of the following pairs is mismatched?
- Which of the following pairs is mismatched? d. iodine mordant e. none of the above a. alcohol-decolorizer b. crystal violet-basic dye c. safranin-acid dye 2, Suppose you Gram stained a sample from one colony and observed a field of red and blue cocci. Adjacent cells were not always the same color. You could conclude that you have d. old cells e. made a mistake a. a mixed culture b. young cells c. dividing cells 3. Which of the following...
What are the possible flagellar arrangements on bacteria? Describe the basic structure of peptidoglycan. What is...
What are the possible flagellar arrangements on bacteria? Describe the basic structure of peptidoglycan. What is the difference between gram positive and gram negative cell wall structure? Know the procedure and sequence of performing a gram stain, and what is happening to the bacterial cell after each step. What is the significance of a bacterial cell wall? (why is it so important?) How can hypertonic solutions be used to inhibit bacterial growth? What are the 3 types of motility seen...
Eosin is a red stain that has negative chromophores and malacite green is a green stain...
Eosin is a red stain that has negative chromophores and malacite green is a green stain that has positive chromophores. What would be the observed result of staining a smear with both eosin and malacite green? a) the bacteria would stain red and green b) the bacteria would stain red and the background green c) the background would stain both red and green d) the bacteria would stain blue and purple e) the bacteria would stain green and the background...
dyes, such as phenol red or methylene blue used in differential media? Why are dyes, such as A. to inhibit motility B. to stain microbes C to kill bacteria D. to see microbes to detect pH changes due to metabolism What is the purpose of differential medias to encourage growth of the desired bacteria B to isolate few bacteria to observe metabolism of the bacteria D. to stain bacteria E to determine motility 10 Why does Staphylococcus aureus turn yellow...
QUESTION 15 Why is crystal violet used in the Gram stain retained in the cell wall of Gram positive bacteria, but not in Gram negative bacteria? Gram positive bacteria have a thick peptidoglycan layer while Gram negative bacteria have a thin peptidoglycan layer. Gram positive bacteria form spores and Gram negative do not. O Gram positive bacteria have no peptidoglycan layer and Gram negative bacteria have a thick cell wall O Gram positive bacteria have capsules and Gram negative bacteria...
6) The Gram stain will stain bacteria on the basis of the chemistry of the: a) plasma membranes b) chromosomes c) cell wall d cytoplasmic proteins e) ribosomes 7) The Acid-Fast stain will stain bacteria on the basis of the chemistry of the a) plasma membranes b) chromosomes c) cell wall d) cytoplasmic proteins e) ribosomes 8) The morphology or shape of bacteria that are streptococcal or staphylococcal is dependant of the bacterial: a) cell wall b) plasma membrane c)...
microbiology
QUESTION 7 Procedure for Differential Staining uses OA Two Basic Dyes OB. An Acidic Dye & a Basic Dye O C. Neutral dye with two colored ions O D. Acidic Dyes with contrasting colors QUESTION 8 commonly Both Clostridium species and Bacillus species types of bacteria are co OA Rod-shaped O B. Endospore-producers O C. Gram positive but older cultures appear negative O D. All of the above QUESTION 9 Both Mycobacterium tuberculosis and Coxiella burnetii are A. Gram...
- Which of the following pairs is mismatched? d. iodine mordant e. none of the above a. alcohol-decolorizer b. crystal violet-basic dye c. safranin-acid dye 2, Suppose you Gram stained a sample from one colony and observed a field of red and blue cocci. Adjacent cells were not always the same color. You could conclude that you have d. old cells e. made a mistake a. a mixed culture b. young cells c. dividing cells 3. Which of the following...
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Question 501 pts
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