There are 21 amino acids that make up all the proteins in every living organisms. Protein can be found in a variety of foods. Although animal products tend to have more proteins, certain nuts and grains are also good sources of protein.

Question

Based on this information, which example best shows how proteins can be rearranged through chemical reactions to form new molecules?
A.
Amino acids in animals can be connected to form the proteins needed to repair the skin, but amino acids stay separated in plants and do not form proteins.
B.
Amino acids from nuts and grains change into different amino acids in an animal's digestive system, and then they rearrange to form needed proteins like those that make up skin.
C.
Proteins in the muscle tissue of animals can be broken down into amino acids and then remade into other needed proteins, but proteins found in plants cannot be broken down.
D.
Proteins from plants can be taken in by an animal and broken down into amino acids, which can combine in new ways to form the muscle tissue the animal needs to grow.

Answer 1

The example that best shows how proteins can be rearranged through chemical reactions to form new molecules is:

D. Proteins from plants can be taken in by an animal and broken down into amino acids, which can combine in new ways to form the muscle tissue the animal needs to grow.

This example illustrates the process of digestion and how amino acids derived from different protein sources can be recombined to form new proteins, such as muscle tissue, in animals.