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Questions and Answers
What is a characteristic of the cell walls of Bacteria?
What is a characteristic of the cell walls of Bacteria?
- They are absent in all species
- They are composed of lipopolysaccharides
- They lack peptidoglycan
- They contain a protein–carbohydrate complex called peptidoglycan (correct)
Which domain of organisms lacks peptidoglycan in their cell walls?
Which domain of organisms lacks peptidoglycan in their cell walls?
- Bacteria
- Archaea (correct)
- Eukarya
- All of the above
What is a function of the peptidoglycan layer in bacterial cell walls?
What is a function of the peptidoglycan layer in bacterial cell walls?
- To synthesize proteins
- To regulate cell growth
- To facilitate cell division
- To provide structural support (correct)
Which of the following is a characteristic of Gram-negative cell walls?
Which of the following is a characteristic of Gram-negative cell walls?
What is a difference between bacterial and eukaryotic cell membranes?
What is a difference between bacterial and eukaryotic cell membranes?
What is a characteristic that distinguishes eukaryotic from prokaryotic cells?
What is a characteristic that distinguishes eukaryotic from prokaryotic cells?
What is the primary function of the cell wall in prokaryotes?
What is the primary function of the cell wall in prokaryotes?
What is the term for the carbohydrate 'backbone' of the peptidoglycan layer?
What is the term for the carbohydrate 'backbone' of the peptidoglycan layer?
Which of the following is NOT a component of the cell envelope?
Which of the following is NOT a component of the cell envelope?
What percentage of the total dry weight of the cell does the cell wall constitute?
What percentage of the total dry weight of the cell does the cell wall constitute?
What is the term for the layer composed of a cross-linked polymeric mesh?
What is the term for the layer composed of a cross-linked polymeric mesh?
What is the outermost layer of the cell envelope, if present?
What is the outermost layer of the cell envelope, if present?
What is the main difference between the peptidoglycan layer in Gram positive and Gram negative bacteria?
What is the main difference between the peptidoglycan layer in Gram positive and Gram negative bacteria?
What is the function of lipopolysaccharide in Gram negative bacteria?
What is the function of lipopolysaccharide in Gram negative bacteria?
What is the characteristic of the Gram negative cell wall?
What is the characteristic of the Gram negative cell wall?
What is the location of teichoic acid in Gram positive bacteria?
What is the location of teichoic acid in Gram positive bacteria?
What is the difference between teichoic acid and lipoteichoic acid?
What is the difference between teichoic acid and lipoteichoic acid?
What is the composition of the Gram negative cell wall?
What is the composition of the Gram negative cell wall?
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