Question

one way the types of lipids differ is their chemical structures. the model shows the chemical structure of a fat. fats are also known as triglycerides. triglycerides store energy in the body. select the true statements. triglycerides have carbon atoms arranged in rings. fats contain nitrogen atoms. triglycerides have mostly carbon and hydrogen atoms.

Explanation:

To determine the true statements, we analyze each option using the given structure of stearin (a triglyceride):

1. "Triglycerides have carbon atoms arranged in rings."

Looking at the structure, the carbon atoms in the fatty acid chains are arranged in a straight (linear) chain, not in rings. So this statement is false.

2. "Fats contain nitrogen atoms."

The structure of stearin (and triglycerides in general) shows only carbon (C), hydrogen (H), and oxygen (O) atoms. There are no nitrogen (N) atoms. So this statement is false.

3. "Triglycerides have mostly carbon and hydrogen atoms."

In the stearin structure, the fatty acid chains are long and consist primarily of carbon (C) and hydrogen (H) atoms (with a small number of oxygen atoms in the ester groups). So this statement is true.

• "Triglycerides have carbon atoms arranged in rings" is false (carbons are in linear chains).
• "Fats contain nitrogen atoms" is false (no N atoms in the structure).
• "Triglycerides have mostly carbon and hydrogen atoms" is true (structure is dominated by C and H).

Answer:

The true statement is: Triglycerides have mostly carbon and hydrogen atoms.