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.
View Larger Image. Whole-Wheat Pasta. Pasta is one of the most carbohydrate-dense foods, making it a great food to eat before big workouts and races, when you want to maximize muscle glycogen stores, and after big workouts, when you want to replenish those stores. But whole-wheat pasta is a better choice than pasta made with refined wheat flour.