BCH210 Midterm 2| 300 Questions| With Complete Solutions
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Module
BCH210
Institution
University Of Toronto (U Of T
)
types of lipids (purpose) correct answer: storage, structural, and signalling
fatty acid chemical structure and charge correct answer: - fatty part is the carbon chain
- acid part is carboxyl group (-COOH)
- negatively charged
which conformations of saturated fatty acids are most stable? ...
bch210 midterm 2| 300 questions| with complete sol
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University of Toronto (U of T
)
BCH210
BCH210
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BCH210 Midterm 2| 300 Questions| With
Complete Solutions
types of lipids (purpose) correct answer: storage, structural, and
signalling
fatty acid chemical structure and charge correct answer: - fatty
part is the carbon chain
- acid part is carboxyl group (-COOH)
- negatively charged
which conformations of saturated fatty acids are most stable?
correct answer: - anti conformation
- extended conformation
unsaturated fatty acids correct answer: double bonds are almost
always in cis conformation which results in kinks in structure
mono-unsaturated fatty acids correct answer: one double bond
octadec-a-noic acid correct answer: saturated fatty acid with all
single bonds
octadec-e-noic acid correct answer: unsaturated fatty acid with
ONE double bond
poly-unsaturated fatty acid correct answer: two or more double
bonds
,octadec-adie-noic acid correct answer: unsaturated fatty acid
with TWO double bonds
fatty acid properties/trends correct answer: - more carbons,
higher melting point
- more double bonds, lower melting point
- number of double bonds has a lower melting point even if it
has more carbons
what non-covalent interaction is involved in packing of fatty
acids? correct answer: van der Waals packing interactions
the storage lipid correct answer: triacylglycerols
where are triacylglycerols primarily found? correct answer:
adipocyte cells (fat cells)
structure of triacylglycerols correct answer: glycerol with three
fatty acid chains
linkages important in triacylglycerols correct answer: ester
linkages
classes of triacylglycerols correct answer: - simple and mixed
(based on fatty acid chains)
Tristearin correct answer: example of simple triacylglycerol
example of mixed triacylglycerol correct answer: Palmitoleic
(cis), Myristic (short), Stearic (long)
,what disease are trans-fatty acids correlated with? correct
answer: cardiovascular disease (because trans conformation
make packing easy)
three types of membrane lipids (polar) correct answer:
phospholipids, glycolipids, sterols
types of phospholipids correct answer: glycerophospholipids
and sphingolipids
type of glycolipids correct answer: glycosphingolipids
type of sterols correct answer: cholesterol
polar head groups of membrane lipids correct answer: - OH
- sugar
- phosphate
membrane lipids with polar head groups correct answer: -
glycerophospholipids
- sphingolipids
- glycosphingolipids
Most abundant membrane lipids in cells? correct answer:
glycerophospholipids
glycerophospholipid structure correct answer: fatty acyl chains,
glycerol backbone, phosphate, head group
glycerophospholipid constants correct answer: glycerol and
phosphate
, glycerophospholipid variables correct answer: - fatty acid tails
(length, degree of saturation)
- head groups (size, charge)
what is diphosphatidylgylcerol found in? correct answer: the
mitochondria in the heart
second major class of membrane lipids? correct answer:
sphingolipids
sphingolipid structure correct answer: based on sphingosine
backbone (NOT glycerol)
linkage important in sphingolipid? correct answer: amide
linkage
where are sphingolipids degraded? correct answer: in lysosomes
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