The incomplete protein among the options provided is rice.
1. Incomplete Proteins: Incomplete proteins are proteins that do not contain all the essential amino acids needed by the body. Amino acids are the building blocks of proteins, and essential amino acids must be obtained through diet since the body cannot produce them on its own.
2. Rice: Rice is considered an incomplete protein because it lacks some of the essential amino acids required by the body for optimal functioning. Specifically, rice is low in the amino acid lysine.
3. Complete Proteins: On the other hand, eggs, steak, and salmon are examples of complete proteins. Complete proteins contain all the essential amino acids in the proper proportions needed by the body.
4. Examples: Eggs are known as a complete protein source as they contain all essential amino acids. Steak and salmon are also complete proteins, providing a good balance of amino acids necessary for the body.
In summary, among the options given, rice is the incomplete protein as it lacks certain essential amino acids needed by the body.
