Lipid molecules contain either saturated or unsaturated fatty acids. You may have seen different types of fatty acids listed in nutrition labels on foods Based on what you have learned about fatty acids, bonding, and naming of chemical compounds, see if you can make an educated guess as to what the chemical structures of the following fatty acids are.  A. Monounsaturated fatty acids: Think about what unsaturated fats contain, and what number is indicated by the prefix mono- B. Polyunsaturated fatty acids: Think about what the prefix poly- means in the terms polypeptide and polymer. C. Trans fats: Think about how the prefix trans- is used in naming alkenes.

Lipoprotein particles are relatively large, sphericalclumps of protein and lipid molecules (see Figure 3.18)that circulate in the blood of mammals. They are likesuitcases that move cholesterol, fatty acid remnants, triglycerides, and phospholipids from one place to anotherin the body. Given what you know about the solubilityof lipids in water, which types of lipids would you predict to be on the outside of a lipoprotein clump, bathedin the water-based fluid portion of blood?

Lipid solubility is an important parameter that determines the predicted effectiveness of new pharmaceutical medications ahead of their release for public use. Which of the following provides the best explanation for the relevance of lipid solubility in medications? A B с D High lipid solubility will ensure the presence of energy-storing lipid molecules to support the chemical functions of the medication. Low lipid solubility will allow the medication to remain longer in the body, increasing its effectiveness. Low lipid solubility will facilitate more favorable interactions with enzymes in the body. allowing the medication to act more quickly. High lipid solubility will allow the medication to more readily diffuse through the cell membrane.

Glucose polymers: Which of the following is/are FALSE? a. Beta-glycosidic bonds are found in starch, glycogen and chitin b. Beta-glycosidic bonds are found in cellulose and chitin C. alpha-glycosidic bonds are found in starch and glycogen d. alpha-glycosidic bonds are found in chitin and cellulose O b,c.d O a, b, c, d а, d a,b, d

The figure below illustrates the molecular structures of two fatty acids. A B H₂C The structural formula of erucic acid and behenic acid с H₂C D erucic acid behenic acid Which of the following best explains why erucic acid is liquid at room temperature but behenic acid is solid at room temperature? O OH The presence of a double carbon to carbon bond in erucic acid prevents the molecule from packing closely together. The lack of any double carbon-carbon bonds in behenic acid causes the molecule to be come polar and therefore packed more tightly. The larger number of carbon atoms in erucic acid prevents the molecule from packing tightly together. OH The smaller number of carbon atoms in behenic acid creates stronger covalent bonds between the carbon atoms allowing for them to pack more tightly together.

For each lipid below list the components of the structure and specific linkages in the structure.   Cerebroside: Triacylglycerol: Sphingomyelin: Cholesterol:

During hydrogenation, cis double bonds are converted to trans double bonds.  In the lab, we compare three fats, each of which has fatty acid chains that are exactly the same length (number of carbons) and observe the following: Fat 1 contains only saturated fatty acids 16 carbons long, and has a melting point of 65 degrees C. Fat 2 contains only cis unsaturated fatty acids 16 carbons long, and has a melting point of 35 degrees C. Fat 3 contains only trans fatty acids 16 carbons long, and has a melting point of 65 degrees C. Both Fat 2 and Fat 3 contain fatty acids with a single double bond; fat 1 has no double bonds.  Why do Fat 3 and Fat 1 have more similar melting points than Fat 3 and Fat 2? Group of answer choices The number of hydrogen atoms in the fatty acids of fats 1 & 3 is higher, and having more hydrogen atoms raises the melting point of the fat. The fatty acids in fats 1 & 3 have a linear shape, so they pack tightly together and have lots of hydrophobic…