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 help muscles contract. chicken and beans are protein sources. proteins are the primary energy source for cells. proteins are found only in animals.

Explanation:

• The text states "They help transport molecules, contract muscles...", so "Proteins help muscles contract" is true.
• The first paragraph says "beef, chicken, cheese, eggs, nuts, and beans have in common? They are all sources of protein", so "Chicken and beans are protein sources" is true.
• Carbohydrates are the primary energy source for cells, not proteins, so "Proteins are the primary energy source for cells" is false.
• The text mentions "found in animals and plants", so "Proteins are found only in animals" is false.

Answer:

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