When people hear the word “protein,” the first food that often comes to mind is meat. Some people believe that they cannot obtain sufficient protein unless they eat meat. There are, however, many dietary sources of protein, both animal and plant. From the list below, choose all the correct statements about dietary sources of protein. Select all that apply.

Which of the following foods is the best source of polyunsaturated fatty acid?

Proteins, along with carbohydrates and lipids, are one of the three macronutrients. Proteins are composed of amino acids, which are divided into two nutritional categories: essential and nonessential amino acids. Choose the correct statement about essential, nonessential, and conditionally essential amino acids.

Fatty acids can be classified by their level of saturation, which is indicative of whether there are any double bonds between carbon atoms. Select the item that is the best choice to fill in the blank below. ____________ always have two or more double bonds between adjacent carbon atoms in the fatty acid chain, making them liquid at room temperature.

Complete proteins are primarily derived from animal products and contain all nine essential amino acids in adequate amounts to support good health. There are some plant sources of complete proteins, however. In addition, protein sources derived from plants lacking one or more of these amino acids can be paired with complementary foods to create a dish with all of the essential amino acids. Match each protein food with the correct category.

When you eat a peanut butter sandwich, what happens to the protein in the peanut butter and the whole-wheat bread after it has been chewed and swallowed? To describe and understand these processes, you must be able to use the vocabulary effectively. This activity asks you to match the correct terms to sentences about proteins and their structure. Match the words in the left column to the appropriate blanks in the sentences on the right.

Lipoproteins are classified by their density. Match the statement on the left with the correct term on right.  

A nonessential amino acid is made __________.

Although most Americans generally consume more than adequate levels of protein, protein-energy malnutrition does plague certain populations in the United States and abroad, especially in developing countries. A variety of genetic disorders can also affect protein metabolism. Fill in the blank about phenylketonuria. Phenylketonuria is a ______________.

The blood lipid profile associated with the lowest risk of cardiovascular disease is __________.