Question

To make a C20:0 fatty acid, the first 16 carbon chain is made in __________, and...

To make a C20:0 fatty acid, the first 16 carbon chain is made in __________, and then the last 4 carbons are added in ____________.

Group of answer choices

Cytosol, ER

Mitochondria, nucleus

Mitochondria, ER

Mitochondria, mitochondria

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Answer #1

To make a C20:0 fatty acid, the first 16 carbon chain is made in cytosol, and then the last 4 carbons are added in ER.

Option A Is correct, because upto first 16 carbon chain, the fatty acid is made in cytosol with the help of various enzymes and then elongation occurs in endoplasmic reticulum (ER) and 4 carbons are added to make C20:0 fatty acid.

Option B, C and D are incorrect because upto first 16 carbon chain, the fatty acid is not made in mitochondria.

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