KU BIOL 600 EXAM 4 QUESTIONS AND CORRECT
ANSWERS
the second round of fa synthesis involves the condensation reaction of
__________ and __________ - ANSWER malonyl acp, butyryl acp
the reaction of acetyl acp with malonyl acp produces a __________ compound
calledacetoacetyl acp - ANSWER 4 c
fa synthesis requires what for molecules - ANSWER acetyl coa, atp, co2,
nadph
fa synthase is multifunctional enzyme where all the components are located on a
polypeptide chin but exists a __________ dimer - ANSWER single, homo
the er performs what two key functions in fa synthesis - ANSWER elongation
past c16, introduces double bonds into saturated fa
phosphatidate is converted to __________ as the active precursor to the
synthesis of cadiolipin and phosphotidylinositol 4,5-bisphosphate - ANSWER
cdp diacylglycerol
if an alcohol is the active precursor and not diacylglycerol, the phospholipids
__________ and __________ are synthesized - ANSWER
phosphatidylethanoalamine, phosphatidylcholine
ceramide has __________ as its backbone structure instead of glycerol -
ANSWER sphingosine
the key regulatory enzyme in lipid synthesis is - ANSWER phosphatidic acid
phosphatase
what are the three stages of cholesterol - ANSWER mevalonate to isopentyl
pyrophosphate, six molecules of isopentyl pyrophosphate are condensed to
squalene, squalene is cyclized and converted into cholesterol
, how does the formation of ketone bodies contribute to cholesterol synthesis -
ANSWER with the breakdown of fatty acids into ketone bodies which are then
converted to acetoacetyl coa, which can then react with acetyl coa to form the
precursor of cholesterol, called hmc coa
one regulation method is transcriptional regulation. describe this process when
cholesterol levels are low - ANSWER when cholesterol levels are low the scap
protein attached to the srebp proteins move to the golgi complex where the
srebp is cleaved twice to cleave off the sre. sre then moves to the nucleus and
binds to dna resulting in the increase of those enzymes involved in cholesterol
production
what separates ldl's from hdl's - ANSWER ldl's have a higher lipid/protein ratio
than hdl's
ldl's are delivered into the cellular cytoplasm by what method - ANSWER
receptor mediated endocytosis
what vitamin made from cholesterol uses sunlight for its synthesis - ANSWER
vitamin d
name enzymes involved in the digestion of fats - ANSWER lipases
name enzymes involved in the digestion of proteins - ANSWER trypsin,
chymotrypsin, pepsin
name enzymes involved in the digestion of starch - ANSWER elastase
in amino acid degradation, the amino group is transferred by __________ into
__________ to form the amino acid __________ - ANSWER
aminotransferase, a-ketoglutarate, glutamate
in terrestrial vertebrates, the ultimate fate of nh4 is the formation of
__________ - ANSWER urea
fish excrete nh4 as __________ - ANSWER ammonia
ANSWERS
the second round of fa synthesis involves the condensation reaction of
__________ and __________ - ANSWER malonyl acp, butyryl acp
the reaction of acetyl acp with malonyl acp produces a __________ compound
calledacetoacetyl acp - ANSWER 4 c
fa synthesis requires what for molecules - ANSWER acetyl coa, atp, co2,
nadph
fa synthase is multifunctional enzyme where all the components are located on a
polypeptide chin but exists a __________ dimer - ANSWER single, homo
the er performs what two key functions in fa synthesis - ANSWER elongation
past c16, introduces double bonds into saturated fa
phosphatidate is converted to __________ as the active precursor to the
synthesis of cadiolipin and phosphotidylinositol 4,5-bisphosphate - ANSWER
cdp diacylglycerol
if an alcohol is the active precursor and not diacylglycerol, the phospholipids
__________ and __________ are synthesized - ANSWER
phosphatidylethanoalamine, phosphatidylcholine
ceramide has __________ as its backbone structure instead of glycerol -
ANSWER sphingosine
the key regulatory enzyme in lipid synthesis is - ANSWER phosphatidic acid
phosphatase
what are the three stages of cholesterol - ANSWER mevalonate to isopentyl
pyrophosphate, six molecules of isopentyl pyrophosphate are condensed to
squalene, squalene is cyclized and converted into cholesterol
, how does the formation of ketone bodies contribute to cholesterol synthesis -
ANSWER with the breakdown of fatty acids into ketone bodies which are then
converted to acetoacetyl coa, which can then react with acetyl coa to form the
precursor of cholesterol, called hmc coa
one regulation method is transcriptional regulation. describe this process when
cholesterol levels are low - ANSWER when cholesterol levels are low the scap
protein attached to the srebp proteins move to the golgi complex where the
srebp is cleaved twice to cleave off the sre. sre then moves to the nucleus and
binds to dna resulting in the increase of those enzymes involved in cholesterol
production
what separates ldl's from hdl's - ANSWER ldl's have a higher lipid/protein ratio
than hdl's
ldl's are delivered into the cellular cytoplasm by what method - ANSWER
receptor mediated endocytosis
what vitamin made from cholesterol uses sunlight for its synthesis - ANSWER
vitamin d
name enzymes involved in the digestion of fats - ANSWER lipases
name enzymes involved in the digestion of proteins - ANSWER trypsin,
chymotrypsin, pepsin
name enzymes involved in the digestion of starch - ANSWER elastase
in amino acid degradation, the amino group is transferred by __________ into
__________ to form the amino acid __________ - ANSWER
aminotransferase, a-ketoglutarate, glutamate
in terrestrial vertebrates, the ultimate fate of nh4 is the formation of
__________ - ANSWER urea
fish excrete nh4 as __________ - ANSWER ammonia
