Share Lehninger Chapter 21 - Lipid Synthesis - Intro
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In the activation of a fatty acid, energy from the hydrolysis of ATP is used to
form a double bond in an oxidation reaction.
join the fatty acid to CoA
add a molecule of water across a double bond to give a hydro
oxidize the hydroxyl group on the β carbon.
The coenzyme(s) used in fatty acid synthesis is (are) __________.
NADPH
NADH
FADH2 and NADH
FADH2
The series of reactions that produces energy by hydrolyzing fats to units of acetyl CoA is called
β reduction
hydration
transamination
β oxidation.
During complete oxidation of the fatty acid CH3(CH2)18COOH, __________ molecules of acetyl CoA are produced, and the fatty acid goes through the β-oxidation cycle __________ times.
ten, ten
ten; nine
nine;nine
nine;eight
Most of the energy stored in the human body is in the form of
triacylglycerols
muscle tissue
glycogen
the amino acid pool
The small droplets of fat that are the first step in the digestion of dietary fats are called
emulsions
micelles
low-density lipoproteins.
high-density lipoproteins
A chylomicron is a
digestive enzyme
storage protein
transport lipoprotein.
lipase
Fatty acids are not a source of energy for the brain because
chylomicrons are too large for absorption by brain cells
they cannot diffuse across the blood-brain barrier
the citric acid cycle does not operate in the brain.
there is no lipase in the brain.
The source of energy for red blood cells is
glycerol
glucose
fatty acids
amino acids
The heart muscle's primary source of fuel is
glycogen
amino acids
fatty acids
glucose
Red blood cells do not metabolize fatty acids because they have
no DNA
no mitochondria
no nucleus
a cell membrane
The 2-carbon segments removed from a fatty acid during metabolism are used to form
acetyl CoA
CoA
pyruvate
glucose
The function of fatty acyl CoA is to
isomerize cis fatty acids.
produce a lipoprotein.
produce a 2-carbon segment for metabolism.
activate a fatty acid for metabolism
Beta-oxidation takes place in the
cell membrane
Golgi body
mitochondrial matrix
cytoplasm
