BCH 3025 Exam 4 Practice | 135 Questions And Answers
in animal cells, where does fatty acid synthesis occur? ANS in the cytosol
linolate and beta linolenate are essentail fatty acids because... ANS mammals cannot introduce more than
one double bond in fatty acid chains
what is the function of eicosanoids? ANS they are signaling molecules
which of the following is true about fatty acid synthase of vertebrates? ANS it has a flexible
phosphopanthetheine arm
which of the following occurs during the first cycle of fatty acid chain synthesis? ANS the malonyl group
from malonyl-coa is transferred to the acyl carrier protein (ACP)
in animals, what is the source of acetyl-coa used in fatty acid synthesis ANS citrate
what is the rate determining step in fatty acid synthesis? ANS the formation of malonyl-coa
fatty acyl-coa desaturase, which introduces a double bond in a saturated fatty acid is a ANS mixed-
function oxidase
which of the following is true about triacylglycerols? ANS they are derived from phosphatidic acid
which of the following is true about the regulation of triacylglycerol metabolism? ANS people with severe
diabetes mellitus fail to synthesize fatty acids from carbohydrates
how does aspirin reduce inflammation? ANS it inhibits the formation of prostoglandins
squalene, the 30-carbon precursor to cholesterol is composed of- ANS six isoprene units
all sterols: ANS are alcohols
, chylomicrons ANS are synthesized in the small intestine
which of the following lipoproteins participates in reverse cholesterol transport? ANS HDL
which of the following is true about glycerophospholipids? ANS they have a head group joined by a
phosphodiester linkage
which of the following lipids or lipid-derived molecules has a glycerol backbone? ANS plasmalogen
which of the following occurs when cholesterol enters cells? ANS cholesterol is released from LDL
particles when the particles become internalized by lysosomes
which chemical reaction depicts nitrification ANS NO2 --> NO3
glutamine is derived from which glycolysis or citric acid cycle intermediate? ANS beta-ketoglutarate
newborn infants sometimes develop jaundice because of an accumulation of ANS bilirubin
in the de novo pathway, what is the immediate precursor to dTMP ANS dUMP
which of the following is true about the de novo synthesis of nucleotides? ANS amino acids are precursors
of nucleotides
plants carry out ANS reduction of nitrate
which of the following molecules is not derived from glycine ANS serotonin
the conversion of serine to glycine requires which of the following? ANS tetrahydrofolate (h4 folate)
nucleoside diphosphate kinase catalyzes which reaction? ANS ATP + dCDP <--> ADP + dGDP
in animal cells, where does fatty acid synthesis occur? ANS in the cytosol
linolate and beta linolenate are essentail fatty acids because... ANS mammals cannot introduce more than
one double bond in fatty acid chains
what is the function of eicosanoids? ANS they are signaling molecules
which of the following is true about fatty acid synthase of vertebrates? ANS it has a flexible
phosphopanthetheine arm
which of the following occurs during the first cycle of fatty acid chain synthesis? ANS the malonyl group
from malonyl-coa is transferred to the acyl carrier protein (ACP)
in animals, what is the source of acetyl-coa used in fatty acid synthesis ANS citrate
what is the rate determining step in fatty acid synthesis? ANS the formation of malonyl-coa
fatty acyl-coa desaturase, which introduces a double bond in a saturated fatty acid is a ANS mixed-
function oxidase
which of the following is true about triacylglycerols? ANS they are derived from phosphatidic acid
which of the following is true about the regulation of triacylglycerol metabolism? ANS people with severe
diabetes mellitus fail to synthesize fatty acids from carbohydrates
how does aspirin reduce inflammation? ANS it inhibits the formation of prostoglandins
squalene, the 30-carbon precursor to cholesterol is composed of- ANS six isoprene units
all sterols: ANS are alcohols
, chylomicrons ANS are synthesized in the small intestine
which of the following lipoproteins participates in reverse cholesterol transport? ANS HDL
which of the following is true about glycerophospholipids? ANS they have a head group joined by a
phosphodiester linkage
which of the following lipids or lipid-derived molecules has a glycerol backbone? ANS plasmalogen
which of the following occurs when cholesterol enters cells? ANS cholesterol is released from LDL
particles when the particles become internalized by lysosomes
which chemical reaction depicts nitrification ANS NO2 --> NO3
glutamine is derived from which glycolysis or citric acid cycle intermediate? ANS beta-ketoglutarate
newborn infants sometimes develop jaundice because of an accumulation of ANS bilirubin
in the de novo pathway, what is the immediate precursor to dTMP ANS dUMP
which of the following is true about the de novo synthesis of nucleotides? ANS amino acids are precursors
of nucleotides
plants carry out ANS reduction of nitrate
which of the following molecules is not derived from glycine ANS serotonin
the conversion of serine to glycine requires which of the following? ANS tetrahydrofolate (h4 folate)
nucleoside diphosphate kinase catalyzes which reaction? ANS ATP + dCDP <--> ADP + dGDP
