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Questions and Answers
What is the main difference between gram-negative and gram-positive bacteria?
What is the main difference between gram-negative and gram-positive bacteria?
- Gram-negative bacteria have a thicker peptidoglycan layer
- Gram-negative bacteria have an outer membrane composed of lipopolysaccharides (correct)
- Gram-negative bacteria retain the crystal violet stain
- Gram-negative bacteria are more susceptible to antibiotics
Why are gram-negative bacteria more resistant to antibiotics?
Why are gram-negative bacteria more resistant to antibiotics?
- They have thicker cell walls
- They have a higher concentration of antibiotics in their cytoplasm
- They have an outer layer of lipopolysaccharides that impedes the entry of antibiotics (correct)
- They have a lower rate of antibiotic uptake
What is the composition of the cell envelope in gram-negative bacteria?
What is the composition of the cell envelope in gram-negative bacteria?
- A thick peptidoglycan layer and an outer membrane of lipopolysaccharides (correct)
- A thin peptidoglycan layer and an inner cytoplasmic cell membrane
- A thick peptidoglycan layer and an inner cytoplasmic cell membrane
- A thin peptidoglycan layer and an outer membrane of phospholipids
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