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الحل خطوة بخطوة:
لدينا fatty acid فيه 20 carbon و 4 double bonds.
1️⃣ لو كان مشبعًا
قاعدة الحمض الدهني المشبع:
CₙH₂ₙO₂
عندما n = 20:
H = 2 × 20 = 40 H
2️⃣ نطرح الهيدروجين بسبب الروابط المزدوجة
كل Double bond = −2H
لدينا 4 روابط:
4 × 2 = 8H
3️⃣ نحسب الهيدروجين النهائي
40 − 8 = 32 H
✅ الإجابة الصحيحة: A. 32 H
🧠 القاعدة:
H = 2n − 2(number of double bonds)
= 40 − 8 = 32 H
A fatty acid has 20 carbon atoms and 4 double bonds.How many hydrogen atoms does it contain?Formula for a saturated fatty acid: CₙH₂ₙ₊₁COOH
A fatty acid has 20 carbon atoms and 4 double bonds.How many hydrogen atoms does it contain?Formula for a saturated fatty acid: CₙH₂ₙ₊₁COOH
A fatty acid is 18:3.How many hydrogen atoms are lost due to its double bonds?
If each double bond causes a loss of 2 hydrogen atoms, how many hydrogen atoms are lost compared with the corresponding fully saturated fatty acids?
A phospholipid contains arachidonic acid (20:4, ω-6) at the sn-2 position of glycerol. Which statement best explains its biological significance?
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2. A high iodine number indicates:
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15. Lysophosphatidylcholine is also called:
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14. The most common lysophospholipid is:
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13. Lysophospholipids are produced when:
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7. Phosphatidylinositol acts as a second messenger for:
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6. The stereoisomer of inositol present in phosphatidylinositol is:
