Hc 5) The molecule above is a) A monounsaturated fat common in animal grease b)

Question

Hc 5) The molecule above is a) A monounsaturated fat common in animal grease b) A saturated fat common in adipose tissue c A trans fat resulting from high temperature cooking or partial dehydrogenation d) A polyunsaturated fat that might be found in certain oils 6) Reaction1 above is part of what aspect of metabolism? a) Amino acid breakdown b) Fatty acid oxidation c) A transaldolase exchange reaction d) Sugar amine breakdown 7) Reaction I above involves what cofactor? a) NADH b) Thiamine Pyrophosphate c) Biotin d) Pyridoxal Phosphate Reaction 2 8) Reaction 2 above would likely involve what mechanism a) TPP mediated condensation b) Schiff-base mediated condensation c) Biotin-mediated condensation d) Thiol mediated condensation 9 Based on what you know of similar reactions you have studied, you would expect the free energy of reaction 2 in the direction written to be (c g, in the cytoplasm of a cell) a) A large negative free energy (ncarly irmeversible forwards) b) A large positive free energy (nearly irreversible backwards) c A free energy not far from zero (reversible) d) It depends on which enzyme one uses to run the reaction

Explanation / Answer

5. D

The given triglyceride contains the glycerol part joined with palmitic acid, oleic acid and alpha-linolenic acid. Both oleic acid and alpha-linolenic acid are unsaturated with cis geometric configuration. Hence, it is neither option 1 & 2 that is monosaturated or saturated, nor option 3 that is a trans fat. Hence, the correct answer is D.

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