Chapter 23, Problem 18TE

To determine

The reason for egg being a better source of protein than peanut butter.

Answer to Problem 18TE

As it contains important amino acids which plant derived proteins lack.

Explanation of Solution

The egg is considered to be a good source of protein as it contains all the important amino acids which plant derived protein products lack. The peanut butter is a plant derived protein source. The animal protein such as egg consist of essential amino acids such as lysine, methionine or tryptophan. Such amino acids are important for the growth of muscles and proper functioning of the human body. Hence their intake is very necessary form other sources such as animal sources.

Conclusion:

Therefore,as it contains important amino acids which plant derived proteins lack.