1. Which lipoprotein functions primarily to transport cholesterol from extrahepa
ID: 277645 • Letter: 1
Question
1. Which lipoprotein functions primarily to transport cholesterol from extrahepatic tissues back to the liver?
HDLs
LDLs
chylomicrons
VLDLs
2. Which statement is most FALSE regarding the pentose-phosphate pathway?
a) NADH is produced
b) CO2 is produced as a product
c) it is primarily an anabolic pathway
d) it can generate ribose-5-phosphate from glucose-6-phosphate
3. The density of a lipoprotein has a positive correlation with the amount of _________ in the lipoprotein
a) TAGs
b) cholesterol
c) protein
d) free fatty acids
a) fatty acids with bent conformation - preventing the close intermolecular interactions which are present in fats like lard or butter.
b) cis-unsaturated fatty acids
c) poly-unsaturated fatty acids
d) trans-unsaturated fatty acids
a) these bonds are a result of the lone pairs on the glycerol alcohol groups attacking the carbonyl carbon in a fatty acid
b) these bonds are ester linkages
c) these bonds can be broken with the addition of water in the presence of a set of enzymes called lipases
d) each glycerol molecule is bound via a C=C double-bond in the fatty tail of the fatty acid
1. Which lipoprotein functions primarily to transport cholesterol from extrahepatic tissues back to the liver?
HDLs
LDLs
chylomicrons
VLDLs
2. Which statement is most FALSE regarding the pentose-phosphate pathway?
a) NADH is produced
b) CO2 is produced as a product
c) it is primarily an anabolic pathway
d) it can generate ribose-5-phosphate from glucose-6-phosphate
3. The density of a lipoprotein has a positive correlation with the amount of _________ in the lipoprotein
a) TAGs
b) cholesterol
c) protein
d) free fatty acids
4. Which of the following types of fatty acids would be absent (or present in very low concentrations) in sunflower oil?a) fatty acids with bent conformation - preventing the close intermolecular interactions which are present in fats like lard or butter.
b) cis-unsaturated fatty acids
c) poly-unsaturated fatty acids
d) trans-unsaturated fatty acids
5. Which of the following statements is most FALSE concerning the bonds that join a fatty acid together with glycerol into a TAG?a) these bonds are a result of the lone pairs on the glycerol alcohol groups attacking the carbonyl carbon in a fatty acid
b) these bonds are ester linkages
c) these bonds can be broken with the addition of water in the presence of a set of enzymes called lipases
d) each glycerol molecule is bound via a C=C double-bond in the fatty tail of the fatty acid
Explanation / Answer
1) Which lipoprotein functions primarily to transport cholesterol from extrahepatic tissues back to the liver - HDLs. option A.
2) Which statement is most FALSE regarding the pentose-phosphate pathway - CO2 is produced as a product. option B.
3) The density of a lipoprotein has a positive correlation with the amount of _________ in the lipoprotein - cholesterol. option B.
4) Which of the following types of fatty acids would be absent (or present in very low concentrations) in sunflower oil - trans-unsaturated fatty acids. option D.
5) Which of the following statements is most FALSE concerning the bonds that join a fatty acid together with glycerol into a TAG - each glycerol molecule is bound via a C=C double-bond in the fatty tail of the fatty acid. option D.
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