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Section V – Metabolism of Lipids
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Which one of the following statements concerning fatty acid molecules is CORRECT?
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A. They consist of a carboxylic acid head group attached to a carbohydrate chain.
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B. They are called polyunsaturated when they contain one or more carbon–carbon double bonds.
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C. Their melting points increase with increasing unsaturation.
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D. They almost always have their double bonds in the cis configuration when they occur naturally.
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E. They occur in the body mainly in the form of free (nonesterified) fatty acids.
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Which one of the following is NOT a phospholipid?
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Which one of the following statements about gangliosides is INCORRECT?
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A. They are derived from galactosylceramide.
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B. They contain one or more molecules of sialic acid.
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C. They are present in nervous tissue in high concentrations.
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D. The ganglioside GM1 is the receptor for cholera toxin in the human intestine.
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E. They function in cell–cell recognition.
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Gangliosides are derived from glucosylceramide.
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Which one of the following is a chain-breaking antioxidant?
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A. Glutathione peroxidase
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A, B, D, and E are classed as preventive antioxidants as they act by reducing the rate of chain initiation.
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After they are produced from acetyl-CoA in the liver, ketone bodies are mainly used for which one of the following processes?
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A. Excretion as waste products
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B. Energy generation in the liver
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C. Conversion to fatty acids for storage of energy
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D. Generation of energy in the tissues
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E. Generation of energy in red blood cells
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The subcellular site of the ...