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.
Pasta is what's known as a complex carbohydrate. Complex carbohydrates are starches, whereas the other type of carbohydrate -- simple carbs -- are sugars. Fiber is another carbohydrate that's important to your health because it aids digestion and can help reduce cholesterol and stabilize your blood sugar levels.