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Questions and Answers
Which of the following is a characteristic of gram-negative bacteria?
Which of the following is a characteristic of gram-negative bacteria?
- They retain the crystal violet stain used in Gram-staining.
- They have a thick peptidoglycan cell wall. (correct)
- They lack an outer membrane
- They are less resistant to antibiotics than gram-positive bacteria
What is the function of the outer layer of lipopolysaccharides in gram-negative bacteria?
What is the function of the outer layer of lipopolysaccharides in gram-negative bacteria?
- To aid in the retention of the crystal violet stain used in Gram-staining.
- To provide a barrier against the entry of antibiotics. (correct)
- To provide structural support for the cell wall.
- To aid in the transport of nutrients across the cell membrane
Which of the following is a key difference between the cell envelopes of gram-negative and gram-positive bacteria?
Which of the following is a key difference between the cell envelopes of gram-negative and gram-positive bacteria?
- Gram-negative bacteria have a thicker peptidoglycan cell wall.
- Gram-positive bacteria lack an outer membrane
- Gram-negative bacteria lack a cytoplasmic cell membrane
- Gram-positive bacteria have a layer of lipopolysaccharides covering their peptidoglycan cell wall. (correct)
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