Answer the following questions about fatty acid biosynthesis in humans. A) Start

Question

Answer the following questions about fatty acid biosynthesis in humans. A) Starting de novo, how many carbons long will a fatty acid chain be after 5 rounds of synthesis? NOTE: The addition of the first malony group to the acetyl group is round #1 (de novo means from the beginning) Number lo B) What is the longest chain length fatty acid synthase can make? Number 16 C) Which of the following long-chain fatty adds cannot be synthesized by humans and are therefore essential fatty adds? gamma-linolenato linoleate arachidonate alpha-linolenate eicosatrienoate eicosapentaenoate

Explanation / Answer

a) After 5 rounds, 15 carbon long fatty acid chain is formed.

b) After 6 rounds, 16 carbon palmitic acid is produced.

c) Only two fatty acids are known to be essential for humans: alpha-linolenic acid or alpha linoleate (an omega-3 fatty acid) and linoleic acid or linoleate (an omega-6 fatty acid).   

gamma linoleate is a conditionally essential fatty acid.

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