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.
Grain products like bread, cereal, rice, and pasta are good for you. They are important sources of vitamins and minerals. Breads, cereals, rice, and pasta are also good sources of carbohydrates like starch and fiber. Many people think that starchy foods like breads, rice and pasta are fattening.
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.