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Lehninger Chapter 21 - Lipid Synthesis - Intro

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