Eukaryotes are organisms that have evolved membrane-bound organelles such as mitochondria Golgi apparatus, and in the case of plants chloroplasts. Eukaryotes may be multicellular organisms of many cell types which form different tissue structures. Cell membranes and coll walls are composed of a variety of lipids, proteins, and carbohydrate each which provides structure and function to the eukaryotic cell. Which macromolecule is a primary component of cell walls, and which argument provides evidence for how the structure of this molecule relates to its purpose within the cell war? A. Lipids are water insoluble fatty acids and the are the primary component of cell walls; they protect the cell and help maintain its shape because they form carbon rings. B. Carbohydrates like cellulose and chitin are the primary component of cell I walls; they protect the cell and help maintain Its shape because they form chains of rigid carbon rings. C. Lipids are water soluble fatty acids that are the primary component of cell walls; they regulate water uptake by the cell because they form carbon chains. D. Carbohydrates like cellulose and chitin are the primary c component of cell walls;they repel and prevent excess uptake of water because they form rigid linear carbon chains.

## Step 1<br />The question is asking about the primary component of cell walls in eukaryotic cells and how the structure of this molecule relates to its function within the cell wall. <br /><br />## Step 2<br />The options provided are:<br />A. Lipids are water-insoluble fatty acids and are the primary component of cell walls; they protect the cell and help maintain its shape because they form carbon rings.<br />B. Carbohydrates like cellulose and chitin are the primary component of cell walls; they protect the cell and help maintain its shape because they form chains of rigid carbon rings.<br />C. Lipids are water-soluble fatty acids that are the primary component of cell walls; they regulate water uptake by the cell because they form carbon chains.<br />D. Carbohydrates like cellulose and chitin are the primary component of cell walls; they repel and prevent excess uptake of water because they form rigid linear carbon chains.<br /><br />## Step 3<br />The correct answer is B. Carbohydrates like cellulose and chitin are the primary component of cell walls; they protect the cell and help maintain its shape because they form chains of rigid carbon rings. This is because carbohydrates like cellulose and chitin are known to be the primary components of cell walls in eukaryotic cells. They provide structural support to the cell and help maintain its shape. The structure of these carbohydrates, which form chains of rigid carbon rings, allows them to perform this function effectively.