Question

select the true statements. phospholipids contain only carbon and hydrogen atoms. cell membranes contain phospholipids. phospholipids have carbon atoms arranged in two long chains.

Explanation:

• Phospholipids contain carbon, hydrogen, oxygen, nitrogen, and phosphorus atoms, so the statement "Phospholipids contain only carbon and hydrogen atoms" is false.
• Cell membranes are composed of a phospholipid bilayer, so the statement "Cell membranes contain phospholipids" is true.
• Phospholipids have two long hydrocarbon chains (composed of carbon atoms) as part of their structure, so the statement "Phospholipids have carbon atoms arranged in two long chains" is true.

Answer:

• B. Cell membranes contain phospholipids.
• C. Phospholipids have carbon atoms arranged in two long chains.