Which component is present only in the cell wall of Gram-positive bacteria but NOT in Gram-negative bacteria?
Correct answer: A. Teichoic acids
- A. Teichoic acids
- B. Lipids
- C. Peptidoglycan
- D. Periplasmic space
Explanation
Teichoic acids are unique components found only in the cell walls of Gram-positive bacteria. They are acidic, phosphate-containing polysaccharides that play a crucial role in maintaining the structural integrity of the cell wall and providing a negative charge to the cell surface.Gram-positive bacteria have a thick peptidoglycan layer (20-80 nanometers) and a teichoic acid layer, whereas Gram-negative bacteria have a thinner peptidoglycan layer (2-3 nanometers) and an outer membrane containing lipopolysaccharides.
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About Kingdom Prokaryotae
Kingdom Prokaryotae includes bacteria and cyanobacteria, organisms with no membrane-bound nucleus or membrane-bound organelles. It covers their cell wall, capsule, flagella, plasmids, forms of nutrition, binary fission, useful and harmful roles, and the differences between prokaryotic cells and eukaryotic cells.
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