Final answer:
Cereal grains can range from around 5-15% crude protein (CP). The protein content is just one aspect of their overall nutritional value, as they also provide vitamins, minerals, and dietary fiber.
Step-by-step explanation:
Cereal grains can range from around 5-15% crude protein (CP). The actual percentage can vary depending on the specific grain and its processing. For example, wheat typically contains about 13% CP, while corn has around 9% CP. Other cereal grains like barley, oats, and rice can fall within this range as well.
It's important to note that the protein content of cereal grains is relatively low compared to other plant-based protein sources like legumes or soybeans. However, cereal grains still serve as an essential source of carbohydrates and provide energy in our diet.
Overall, when considering the nutritional content of cereal grains, their protein content is just one aspect. They also provide important vitamins, minerals, and dietary fiber.