Gram positive bacterias have a cell wall which will stain in violet color. Gram negative bacterias, howâ¦ever, have an extra layer of cell wall around them which prevents the cell wall from being dyed. These gram negative bacterias will need an additional stain called safranin to make the bacterias redish color.
Answer   Pasta is a source of carbohydrates, so to the extent that the body needs carbohydrates, absolutely! And most pasta is pretty much low or no fat. The sauce eaten â¦ with the pasta is often very calorie and fat rich with meats, oils, cheeses and butter.
Wholewheat flour has about 3 times the fiber of regular pasta made with white flour, Coloured pastas such as carrot, beef, or spinach are certainly pretty and add variety, but they don't count as a vegetable serving. Make sure you add a vegetable to the pasta dish to get it's nutrient content higher.