Question

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:

• Proteins are involved in muscle contraction. Actin and myosin are proteins that play crucial roles in muscle movement.
• Chicken is an animal - based protein source, and beans are a plant - based protein source.
• Carbohydrates are the primary energy source for cells, not proteins. Proteins have many other functions like structural support, enzyme activity, etc.
• Proteins are found in both plants (e.g., in legumes like beans, in nuts) and animals (e.g., in meat, eggs).

Answer:

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