Question

a phospholipid molecule has two fatty acid molecules, one glycerol molecule, and a molecule called a phosphate group. the phosphate group is referred to as the \head,\ and the fatty acid chains are the \tails.\ the model shows the chemical structure of a phospholipid. select the true statements. fatty acid chains in a phospholipid have nitrogen and phosphorus atoms. unlike triglycerides, phospholipids have a phosphate group and two fatty acid chains. fatty acids in a phospholipid are called heads.

Explanation:

1. Analyze the first statement: Fatty - acid chains in a phospholipid are composed mainly of carbon and hydrogen atoms, not nitrogen and phosphorus atoms, so this statement is false.
2. Analyze the second statement: Triglycerides have three fatty - acid chains, while phospholipids have a phosphate group and two fatty - acid chains, so this statement is true.
3. Analyze the third statement: The phosphate group is the head, and the fatty - acid chains are the tails in a phospholipid, so this statement is false.

Answer:

Only the statement "Unlike triglycerides, phospholipids have a phosphate group and two fatty acid chains." is true.