Final answer:
Saturated fatty acids have no double bonds, while monounsaturated and polyunsaturated fatty acids have one or more double bonds. Trans fatty acids are artificially processed unsaturated fats. Food sources of essential fatty acids include fatty fish, seeds, nuts, and oils. One gram of fat contains about 9 kilocalories.
Step-by-step explanation:
a. Compare saturated, monosaturated, polyunsaturated, and trans fatty acids:
Saturated fatty acids have no double bonds in their carbon chain, making them solid at room temperature. Examples include butter and lard. Monounsaturated fatty acids have one double bond in their carbon chain and are liquid at room temperature but solidify at lower temperatures. Examples include olive oil and avocados. Polyunsaturated fatty acids have multiple double bonds and remain liquid even at low temperatures. Examples include sunflower oil and salmon. Trans fatty acids are unsaturated fatty acids that have been artificially processed to become solid at room temperature. They are found in many processed foods like margarine and baked goods.
b. List 5 food sources of essential fatty acids:
Examples of food sources rich in essential fatty acids, specifically omega-3 and omega-6 fatty acids, include fatty fish like salmon and tuna, flaxseed and chia seeds, walnuts, soybean oil, and hemp seeds.
c. How many kilocalories are in one gram of fat?
One gram of fat contains approximately 9 kilocalories (or calories). This is more than double the energy content of carbohydrates, which contain around 4 kilocalories per gram.