30 Questions
Which staining technique is used to differentiate Gram-positive and Gram-negative bacteria?
Gram staining
What color do Gram-positive bacteria stain in Gram staining?
Blue
What color do Gram-negative bacteria stain in Gram staining?
Pink
Which bacterial structure can be revealed using special/structural staining techniques?
Capsules
Which type of bacteria are rod-shaped?
Bacilli
Which type of bacteria are oval-shaped and can appear as coccobacilli?
Coccobacilli
Which bacteria strain is found in Yakult?
Lactobacilli shirota
Which staining technique might have been used for the purple stain in Figure 27?
Another staining technique
Which bacteria are Gram-negative coccobacilli according to Figure 27?
Haemophilus
What is the purpose of differential staining?
To differentiate bacterial structures
Which staining technique is commonly used to differentiate Gram-positive and Gram-negative bacteria?
Gram staining
What color do Gram-positive bacteria stain in Gram staining?
Blue
Which bacterial structure can be revealed using special/structural staining techniques?
Spores
Which type of bacteria are oval-shaped and can appear as coccobacilli?
Haemophilus
Which bacteria strain is found in Yakult?
Lactobacilli
Which of the following is NOT a characteristic of bacteria that contribute to their ability to cause disease?
Lack of specific receptors on host cells
Which of the following enzymes is responsible for degrading collagen, the major protein of fibrous connective tissue?
Collagenase
Which of the following antiphagocytic factors is NOT correctly matched with its example?
Pili - S. pyogenes
Which of the following statements about bacterial pathogenesis is NOT true?
Bacteria always cause symptoms by infecting host cells.
Which of the following factors does NOT influence the degree of disease caused by bacteria?
Presence of extrachromosomal genes
Which of the following is NOT a natural defense mechanism of the human body against bacterial invasion?
Airways
Which of the following is NOT a way in which bacteria can adapt and better survive in their environment?
Increased susceptibility to the immune system
Which of the following is an example of a bacterial enzyme that dissolves coagulated plasma and aids in the rapid spread through tissues?
Streptokinase/fibrinolysin
Which of the following is NOT an example of an antiphagocytic factor produced by bacteria?
M protein
Which of the following is NOT a characteristic of bacterial biofilms?
Ability to invade host cells
Which of the following is NOT a way in which bacteria can adapt and better survive in their environment?
Gaining or losing genetic traits
Which of the following is NOT an example of an antiphagocytic factor produced by bacteria?
Surface protein A
Which of the following enzymes is responsible for degrading collagen, the major protein of fibrous connective tissue?
Collagenase
Which of the following is NOT a characteristic of bacterial biofilms?
A slimy coat on solid surfaces
Which of the following statements about bacterial pathogenesis is NOT true?
Virulent bacteria always cause excessive inflammatory or immune system response
Test your knowledge on lipopolysaccharide components (LPS) and their role in the outer membrane of bacteria. Learn about their asymmetrical nature, ability to exclude hydrophilic and hydrophobic molecules, and their role in protecting the cell.
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