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CHEM 210 Lipids Exam Q&A – Biochemistry Chapter 5 Study Guide 2026/2027, Exams of Biochemistry

Johns Hopkins University (JHU)Biochemistry

Detailed CHEM 210 Chapter 5 study guide covering lipid structure, fatty acids, phosphoglycerides, and membrane biology. Includes key concepts such as saturated vs unsaturated fats, cholesterol function, and the fluid mosaic model. Ideal for exam preparation and understanding lipid metabolism and membrane structure. lipids, fatty acids, phospholipids, cholesterol, membrane structure, fluid mosaic model, biochemistry exam

Typology: Exams

2025/2026

Available from 03/25/2026

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CHEM 210 Module 5 Exam Newest
2026/2027
1. How is the definition of lipid different from protein and carbohydrate?: The
lipid definition is based on the functional definition of being soluble in a non-polar
solvent. Proteins and carbohydrates are based on the structure.
2. What are three functions of lipids?: Any three of: energy, storage, vitamin,
protection, and insulation
3. How does the omega numbering system differ from the simplified nota-
tion?: The simplified notation starts number at the carboxylic acid, while the omega
system starts at the opposite end - from the -CH3.
4. What does unsaturated mean for a fatty acid?: Unsaturated indicates that one
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Download CHEM 210 Lipids Exam Q&A – Biochemistry Chapter 5 Study Guide 2026/2027 and more Exams Biochemistry in PDF only on Docsity!

CHEM 210 Module 5 Exam Newest

  1. How is the definition of lipid different from protein and carbohydrate?: The lipid definition is based on the functional definition of being soluble in a non-polar solvent. Proteins and carbohydrates are based on the structure.
  2. What are three functions of lipids?: Any three of: energy, storage, vitamin, protection, and insulation
  3. How does the omega numbering system differ from the simplified nota- tion?: The simplified notation starts number at the carboxylic acid, while the omega system starts at the opposite end - from the - CH3.
  4. What does unsaturated mean for a fatty acid?: Unsaturated indicates that one

or more double bonds are present.

  1. What is the difference between a fat and oil?: An oil is a lipid that is a liquid at room temperature, while fat is a solid at room temperature.
  2. How are phosphoglycerides similar to triacylglycerols? How they different?- : similar: Both have glycerol as a backbone structure. Both have fatty acids attached to the glycerol. Differences: phosphoglycerides have two fatty acids attached to the glycerol and, as the name implies, triacylglycerols have three fatty acids. Phosphoglyceride has a polar head group attached.
  3. What is the primary function of phosphoglycerides mentioned in this mod- ule?: forming membrane bilayers
  4. Describe at least two functions of sphingolipids.: They serve as blood group determinants, the structure of membrane bilayers, and in the myelin sheath of neurons.
  1. organic molecule that dissolves in a non-polar solventt: lipid
  2. what can a solid fat and liquid fat dissolve in: hexane
  3. functions of lipids: energy storage, form wax for protection, cell membrane, and vitamins
  1. where are odd number fatty acid chains found: in nature and most organisms have a process for digesting them
  2. consist of a long carbon chain containing a carboxylic acid functional group at one end: fatty acid
  3. what does it mean to be a saturated fatty acid: no double bonds present
  4. what does it mean to be unsaturated: there one or more double bonds present
  5. definition of polyunsaturated fatty acid: contains 2 or more double bonds in a single fatty acid chain
  6. why do PUFA's require less energy to digest: they contain fewer carbon-car- bon single bonds to break and are considered good fats
  7. function of triaglycerols: store energy and provide insulation by trapping heat
  8. why are triglycerides good molecules for storage: dense storages of energy because they have long chains of carbon and hydrogen in the form of fatty acid chains. large deposits of these molecules allow camels to store water in the form of fat and bears to hibernate
  9. structure of triaglycerol: glycerol molecule serves as the backbone with three fatty acids attached via an acyl linkage to the glycerol to make a complete molecule
  10. what kind of bond is found in triaglycerol in the polar head: ester bond
  11. what will make a triaglglycerol more liquid like: one or more unsaturated
  1. proteins that go all the way through to transport molecules: integral proteins
  1. FepA membrane protein function: transports vitamin B12 and iron across bilayer with beta barrel motif structure
  2. loosely associated with the membrane and can be separated chemically from the membrane found on either the inner layer of interior or exterior surface: peripheral protein (surface protein)
  3. fluid mosaic model characteristics: - complex mixture of molecules
  • lipids, proteins, carbs
  • each layer has unique composition
  • dynamic movement of molecules
  • noncovalent interactions
  1. form globe like protein also called integral protein: globular protein
  2. Glycerol contains how many carbon atoms?: 3
  3. Which of the following are derived from or made from fatty acids?: Spin- golipids and triaglycerols
  4. Triacylglycerols are made from:: A glycerol backbone and three fatty acids
  5. Which of the following refers to carboxylic acids that are structural com- ponents of lipids?: fatty acids
  6. A particular lipid is a liquid at room temperature, so it is called a(n) .: oil

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  1. are found in high concentrations in the membranes of the myelin sheath.: sphingolipids
  2. In a sphingolipid, the fatty acids are attached at carbon- 2 by this type of linkage?: amide linkeage
  3. Peripheral membrane proteins: Are associated with the inside or outside surface of the membrane
  4. Which statement best describes a general feature of membranes?: Individ- ual lipid molecules are free to move in the membrane
  5. Which vitamin is critical for blood coagulation?: Vitamin K
  6. is not found in membrane bilayers.: triaglycerols
  7. What molecule that protects against UV rays is found both in bacteria and in the eyes?: Caratonoids
  8. What molecule has four fused rings in its structure?: cholesterol
  9. In triacylglycerols, fatty acids are attached to glycerol via a/an linkage.: acyl
  10. A lipid is .: A molecule that dissolves in a non-polar solvent
  11. (Short answer) A particular fatty acid molecule has two bends, or kinks, in its structure. What is the cause of the bending or kinking?: Double bonds cause the fatty acids to bend or kink about in solution. These double bonds reduce

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  1. describes this mixture of lipids and protein from the membrane bilayer.: - fluid mosaic model