149.The main difference in Gram (+)ve and Gram (–)ve bacteria resides in their (a) cell wall (b) cell membrane (c) cytoplasm (d) flagella
Option A Danish bacteriologists Christian Gram for the first time classified bacteria on the basis of the cell wall into two groups Gram +ve and Gram –ve by staining with crystal violet and safranin. Gram +ve cell walls are less complex with peptidoglycan compounds and proteins and no lipids in the cell wall. Whereas in Gram –ve cell walls are more complex with peptidoglycan compounds, phospholipids and lipopolysaccharides and contains 20% lipids.
