Question

what do beef, chicken, cheese, eggs, nuts, and beans have in common? they are all sources of protein. proteins are biological macromolecules, or large carbon - based molecules, found in animals and plants. proteins are one of the three main types of biological macromolecules found in the foods we eat. the other two are carbohydrates and lipids. proteins have diverse functions in living things. proteins help regulate body processes and speed up chemical reactions in cells. they help transport molecules, contract muscles, defend the body against pathogens, and provide structural support for tissues. select the true statements. proteins are the primary energy source for cells. proteins help muscles contract. chicken and beans are protein sources. proteins are found only in animals.

Explanation:

• Carbohydrates are the primary energy source for cells, not proteins, so the first statement is false.
• The text states that proteins help muscles contract, so the second statement is true.
• The text mentions that chicken and beans are sources of protein, so the third statement is true.
• Proteins are found in both animals and plants, so the fourth statement is false.

Answer:

• Proteins help muscles contract.
• Chicken and beans are protein sources.