Lipids Study Questions

Lipids Study Questions - Lipids Study Questions Definition...

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Lipids Study Questions Definition What are lipids? Lipids are soluble inorganic solvents (ether or chloroform) that are not water soluble Fatty acid structure What is the basic structure of FAs? Fatty acids are made up of long carbon chains of 4-22 carbons Classification Fatty acids (FAs) What is valence? What is the valence of carbon? What kinds of bonds does it form? Valence is the characteristic number of chemical bonds formed by a particular chemical element. Carbon has a valence of four meaning that it always forms four bonds. Saturated fatty acids What kinds of bonds are found in saturated FAs? What do we mean by "saturated?" A saturated fatty acid is a fatty acid in which all of the carbon-carbon bonds are single bonds. It is saturated with hydrogen atoms, that is, it contains all the hydrogen it can in its structure. What types of foods are they found in? They are found in animal products, butter and tropical fats. What is their consistency at room temperature? Saturated fats are solid at room temperature. Monounsaturated fatty acids What kinds of bonds are found in monounsaturated FAs? What do we mean by "monounsaturated?"
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Monounsaturated fatty acids contain a single point of unsaturation, that is, a single double bond, in its structure. What foods are they found in? They are found in olive, canola, soybean, and peanut oil What is their consistency at room temperature? What happens to them in a refrigerator? At room temperature they are in liquid form, and once they are placed in the refrigerator they become cloudy Polyunsaturated fatty acids What kinds of bonds are found in polyunsaturated FAs? What do we mean by "polyunsaturated?" Polyunsaturated fatty acids contain more than one point of unsaturation, that is, more than one double bond, in its structure. What foods are they found in? Safflower, sunflower, and corn oil. What is their consistency at room temperature? With so many double bonds, polyunsaturates remain fluid at even lower temperatures; most, in fact, stay liquid even in a freezer Omega- 3 FAs What do we mean by omega-3? Where are these fats found? An omega-3 polyunsaturate has its first double bond at the third carbon from the omega end. There fats are found in fish oils, and is some plants such as flax, canola, soy, and other oils. FA Composition of Common Fats What's the predominant type of fatty acid (as in, how saturated is it) in olive oil? Canola? Beef? Corn oil? Butter? Lard? Coconut oil? Olive oil: monounsaturated fat Beef: Monounsaturated fat
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Canola: monounsaturated fat Corn Oil: Polyunsaturated fat Butter: Saturated fat Lard: Saturated and Monounsaturated Coconut oil: Saturated fat Hydrogenation What is hydrogenation? Why is it done? What kinds of fats result? What new kinds of fats are produced?
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Lipids Study Questions - Lipids Study Questions Definition...

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