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.
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, 5. 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.
6. 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.
7. What is the primary function of phosphoglycerides mentioned in this
mod- ule?: forming membrane bilayers
8. 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.
2/5
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.
1/5
, 5. 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.
6. 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.
7. What is the primary function of phosphoglycerides mentioned in this
mod- ule?: forming membrane bilayers
8. 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.
2/5
