Question

which of the following statements is true?
○ dietary fat provides 9 kcal/g.
○ a polyunsaturated fatty acid has two or more double bonds between carbons in the hydrocarbon chain.
○ olive oil is a rich source of monounsaturated fatty acids.
○ all of these are correct.

Explanation:

• Dietary fat provides 9 kcal/g: This is a well - known fact in nutrition. Fats are a concentrated source of energy.
• A polyunsaturated fatty acid has two or more double bonds between carbons in the hydrocarbon chain: By definition, unsaturated fatty acids have double bonds. Polyunsaturated means multiple (two or more) double bonds.
• Olive oil is a rich source of monounsaturated fatty acids: Olive oil is indeed high in monounsaturated fats, which are considered healthy fats.

Since all the individual statements are correct, the statement “All of these are correct” is also valid.

Answer:

All of these are correct.