4. Positive-inside rule is used to facilitate the determination of membrane protein's orientation. (A) Please explain what the positive-inside rule is? (B) What feature of the plasma membrane leads to this rule?

Part2問答題(每十分,共四十分請在【答案卷】務必依序作答) 1. Please explain the process of how human body synthesize Oleic acid, C18:1, A9. Please include the steps of lipid elongation process, Acetyl-CoA, malonyl-CoA, NADPH and 09 desaturase in your explanation.