Question

phospholipids are another type of lipid. they are the building blocks of cell membranes. the model shows the chemical structure of a phospholipid. select the true statements. cell membranes contain phospholipids. phospholipids contain only carbon and hydrogen atoms. phospholipids have carbon atoms arranged in two long chains.

Explanation:

1. For "Cell membranes contain phospholipids": The problem states "Phospholipids are another type of lipid. They are the building blocks of cell membranes", so this is true.
2. For "Phospholipids contain only carbon and hydrogen atoms": Looking at the chemical structure, there are atoms like oxygen (O), phosphorus (P), nitrogen (N) present (e.g., in the phosphate group and the choline - like group), so this is false.
3. For "Phospholipids have carbon atoms arranged in two long chains": From the given chemical structure of the phospholipid, we can see that there are two long hydrocarbon (carbon - hydrogen) chains, so this is true.

Answer:

• True: Cell membranes contain phospholipids.
• False: Phospholipids contain only carbon and hydrogen atoms.
• True: Phospholipids have carbon atoms arranged in two long chains.