Bioc 2580 exam UPDATED Exam Questions
and CORRECT Answers
Lipids - CORRECT ANSWER - - Are structurally diverse groups of molecules
- defined by the common property hydrophobicity
- use organic solvent to dissolve it
Glycolipids - CORRECT ANSWER - Contain both sugar and lipid portions
- important constituents of cell membrane
Lipoproteins - CORRECT ANSWER - Plasma lipoproteins that is associated with
cardiovascular health and disease
- Eg, VLDL, LDL, HDL
Fatty acids - CORRECT ANSWER - - Building blocks of many complex lipids
- Central intermediate in metabolism but free fatty acids present trace quantities
- Simple lipids
Saturated fatty acids - CORRECT ANSWER - Fatty acids with no double bonds
Unsaturated fatty acids - CORRECT ANSWER - Fatty acids with one or more double
bonds
Common features of fatty acids - CORRECT ANSWER - - Have even number of carbon
atoms
- Are unbranched
- Double bond are commonly cis- configurations (methylene-bridged)
, Melting points of saturated fatty acids - CORRECT ANSWER - - Have extended
configuration and those pack in fairly orderly way
- Have extensive variable in tractions
- As the chain length increases melting point increases and solubility decreases
Melting point of unsaturated fatty acids - CORRECT ANSWER - - Pack less regularly due
to kink, this lowering of the number of favorable interactions
- Melting point is drastically lowered
- Melting points is higher in trans than in cis
Glycerphospholipids - CORRECT ANSWER - Are amphipathic, combine hydrophilic
head and hydrophobic tail
Phosphatidylcholine - CORRECT ANSWER - Represent a class of lipid rather than a
molecule
Different fatty acids = different Phosphatidylcholine molecules
Monosaccharides - CORRECT ANSWER - glucose, fructose, galactose
- consists of a single sugar unit
Chemical properties of monosaccharides - CORRECT ANSWER - - Vary water soluble
- Poor soluble or insoluble in organic
solvants
- colourless
- most are sweet
- formula (CH2O)n
and CORRECT Answers
Lipids - CORRECT ANSWER - - Are structurally diverse groups of molecules
- defined by the common property hydrophobicity
- use organic solvent to dissolve it
Glycolipids - CORRECT ANSWER - Contain both sugar and lipid portions
- important constituents of cell membrane
Lipoproteins - CORRECT ANSWER - Plasma lipoproteins that is associated with
cardiovascular health and disease
- Eg, VLDL, LDL, HDL
Fatty acids - CORRECT ANSWER - - Building blocks of many complex lipids
- Central intermediate in metabolism but free fatty acids present trace quantities
- Simple lipids
Saturated fatty acids - CORRECT ANSWER - Fatty acids with no double bonds
Unsaturated fatty acids - CORRECT ANSWER - Fatty acids with one or more double
bonds
Common features of fatty acids - CORRECT ANSWER - - Have even number of carbon
atoms
- Are unbranched
- Double bond are commonly cis- configurations (methylene-bridged)
, Melting points of saturated fatty acids - CORRECT ANSWER - - Have extended
configuration and those pack in fairly orderly way
- Have extensive variable in tractions
- As the chain length increases melting point increases and solubility decreases
Melting point of unsaturated fatty acids - CORRECT ANSWER - - Pack less regularly due
to kink, this lowering of the number of favorable interactions
- Melting point is drastically lowered
- Melting points is higher in trans than in cis
Glycerphospholipids - CORRECT ANSWER - Are amphipathic, combine hydrophilic
head and hydrophobic tail
Phosphatidylcholine - CORRECT ANSWER - Represent a class of lipid rather than a
molecule
Different fatty acids = different Phosphatidylcholine molecules
Monosaccharides - CORRECT ANSWER - glucose, fructose, galactose
- consists of a single sugar unit
Chemical properties of monosaccharides - CORRECT ANSWER - - Vary water soluble
- Poor soluble or insoluble in organic
solvants
- colourless
- most are sweet
- formula (CH2O)n
