Which type of fatty acids only contain Carbon-Carbon single bonds?
a) Unsaturated.
b) Saturated.
c) Trans fats.
d) Steroids.

• A. Unsaturated.
• B. Saturated.
• C. Trans fats.
• D. Steroids.

Answer: (B)

Verified step by step guidance

1. Begin by understanding the basic structure of fatty acids. Fatty acids are long hydrocarbon chains with a carboxyl group at one end.
2. Identify the types of bonds present in fatty acids. Fatty acids can have single bonds (C-C) or double bonds (C=C) between carbon atoms.
3. Define saturated fatty acids. Saturated fatty acids contain only single bonds between carbon atoms, meaning they are 'saturated' with hydrogen atoms.
4. Contrast saturated fatty acids with unsaturated fatty acids. Unsaturated fatty acids have one or more double bonds, which introduce kinks in the chain and reduce the number of hydrogen atoms.
5. Recognize that trans fats and steroids are different categories. Trans fats are a type of unsaturated fat with trans double bonds, while steroids are a different class of lipids altogether, not directly related to the saturation of fatty acids.