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

Explanation:

• For "Chicken and beans are protein sources": The text states beef, chicken, cheese, eggs, nuts, and beans are all sources of protein, so this is true.
• For "Proteins are the primary energy source for cells": Carbohydrates (not proteins) are the primary energy source for cells, so this is false.
• For "Proteins help muscles contract": The text says proteins "help contract muscles", so this is true.
• For "Proteins are found only in animals": The text mentions proteins are found in "animals and plants", so this is false.

Answer:

A. Chicken and beans are protein sources.
C. Proteins help muscles contract.