Q.71 Match List I with List II
| LIST I | LIST II |
|---|---|
| A. VLDL B. Chylomicrons C. HDL D. LDL | I. Transport cholesterol from peripheral tissues to liver II. Transport cholesterol from liver to other tissues III. Movement of dietary triacylglycerol to various tissues IV. Transport of endogenously synthesized triacylglycerols |
Choose the correct answer from the options given below:
- (A)–(III); (B)–(IV); (C)–(I); (D)–(II)
- (A)–(IV); (B)–(III); (C)–(I); (D)–(II)
- (A)–(I); (B)–(II); (C)–(III); (D)–(IV)
- (A)–(II); (B)–(III); (C)–(IV); (D)–(I)
VLDL transports endogenously synthesized triacylglycerols, chylomicrons move dietary triacylglycerol to tissues, HDL transports cholesterol from periphery to liver, and LDL delivers cholesterol from liver to tissues. The correct option is (B): (A)–(IV); (B)–(III); (C)–(I); (D)–(II).
Question Breakdown
This matching question evaluates lipoprotein functions in lipid transport, crucial for biochemistry in NEET/GATE Life Sciences exams.
Individual Matches
A. VLDL → IV. Transport of endogenously synthesized triacylglycerols
VLDL, produced by liver, carries liver-synthesized triglycerides to peripheral tissues.
B. Chylomicrons → III. Movement of dietary triacylglycerol to various tissues
Chylomicrons, from intestinal cells, transport dietary fats absorbed from meals.
C. HDL → I. Transport cholesterol from peripheral tissues to liver
HDL performs reverse cholesterol transport, removing excess cholesterol from tissues.
D. LDL → II. Transport cholesterol from liver to other tissues
LDL delivers cholesterol from liver to cells for membrane synthesis and hormones.Option Evaluation
Option A-VLDL B-Chylo C-HDL D-LDL Validity Reason First III IV I II False A/VLDL ≠ dietary; B/Chylo ≠ endogenous. Second IV III I II True Perfect match: endogenous (VLDL), dietary (Chylo), reverse (HDL), forward (LDL). Third I II III IV False All mismatched (HDL ≠ peripheral cholesterol delivery). Fourth II III IV I False HDL/LDL reversed; ignores triacylglycerol roles. Lipoprotein transport pathways—VLDL endogenous triacylglycerols, chylomicrons dietary triacylglycerol, HDL from peripheral tissues to liver, LDL from liver to tissues—are high-yield for competitive exams distinguishing exogenous vs endogenous lipid movement.
Lipoprotein Functions Table
Lipoprotein (List I) Function (List II) Origin Primary Lipid A. VLDL IV. Endogenous triacylglycerols Liver Triglycerides B. Chylomicrons III. Dietary triacylglycerol Intestine Dietary TG C. HDL I. Cholesterol periphery → liver Liver/Intestine Cholesterol D. LDL II. Cholesterol liver → tissues VLDL metabolism Cholesterol Exam Strategy
Remember: Chylo = dietary (exogenous), VLDL = liver-made (endogenous), HDL = “good” reverse transport, LDL = “bad” delivery. Common error: Swapping HDL/LDL directions.
