What is one function of proteins in a cell? A. Proteins supply Immediate energy. B. Protelns store genetic information. C. Proteins regulate chemical reactions. D. Proteins are stored for future energy use.

## Step 1<br />Proteins are essential components of all living cells and include many substances, such as enzymes, hormones, and antibodies, that are necessary for the proper functioning of an organism. They are involved in virtually every process within cells.<br /><br />## Step 2<br />Proteins are not primarily used for immediate energy supply; that role is typically filled by carbohydrates. Therefore, option A is incorrect.<br /><br />## Step 3<br />Genetic information is stored in DNA and RNA, not proteins. Thus, option B is incorrect.<br /><br />## Step 4<br />Proteins do regulate chemical reactions in the body. They act as enzymes, which are catalysts that speed up chemical reactions without being consumed in the process. This makes option C correct.<br /><br />## Step 5<br />Proteins are not stored for future energy use; fats are typically stored for this purpose. Hence, option D is incorrect.