Free Lipids MCQs with Answers
52 Lipids MCQs from Biochemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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- A. Apo A-II
- B. Apo C-II
- C. Apo C-III
- D. Apo B-II
Explanation: Apolipoprotein C-II activates lipoprotein lipase, which hydrolyses triglycerides in chylomicrons and VLDL.
Correct answer: Apo C-II- A. HMG CoA reductase
- B. Pyrophospho mevalonate decarboxylase
- C. Lecithin cholesterol acyl transferase (LCAT)
- D. Phospho mevalonate kinase
Explanation: LCAT esterifies free cholesterol in plasma by transferring a fatty acid from lecithin to cholesterol, producing cholesteryl ester.
Correct answer: Lecithin cholesterol acyl transferase (LCAT)- A. Symmertrical bi leaflet structures
- B. Rigid assembly of protein, lipid and carbohydrate
- C. Lipid moiety is amphipathic
- D. Lipid and protein moiety are held by covalent interactions
Explanation: Membrane lipids are amphipathic, having a polar hydrophilic head and nonpolar hydrophobic tails that form the bilayer.
Correct answer: Lipid moiety is amphipathic- A. Lipoproteins
- B. Aminoacids
- C. Bilirubin
- D. Cholesterol
Explanation: Bile acids are synthesized in the liver from cholesterol, which is converted into primary bile acids such as cholic acid and…
Correct answer: Cholesterol- A. Aldosterone
- B. Pregnenolone
- C. Estrogen
- D. Methyl testosterone
Explanation: Pregnenolone is formed from cholesterol and serves as an early steroid precursor that can lead to testosterone synthesis.
Correct answer: Pregnenolone- A. Protein only
- B. Lipids only
- C. Lipids and proteins
- D. None of the above
Explanation: The cell membrane is a phospholipid bilayer containing embedded and associated proteins, which provide transport, receptors and enzymatic…
Correct answer: Lipids and proteins- A. Hydrogen bonding
- B. Not known
- C. Vander wall forces
- D. Hydrophobic interactions
Explanation: Membrane phospholipids spontaneously form bilayers because their nonpolar hydrocarbon tails avoid water while their polar heads interact…
Correct answer: Hydrophobic interactions- A. LDL (Low density lipoprotein)
- B. VLDL (Very low density lipoprotein)
- C. Chylomicron
- D. HDL (High density lipoprotein)
Explanation: LDL carries the greatest proportion of cholesterol, especially cholesteryl esters, among the listed lipoproteins.
Correct answer: LDL (Low density lipoprotein)- A. 40%
- B. 30%
- C. 50%
- D. 75%
Explanation: Dietary fat normally supplies about 30% of total energy intake in a balanced diet.
Correct answer: 30%- A. Sphingomyelin
- B. Lecithin
- C. Cephalin
- D. Cerebroside
Explanation: Cerebrosides are glycolipids composed of ceramide plus a single sugar, not phosphate.
Correct answer: Cerebroside- A. Oleic acid
- B. Arachitlonic acid
- C. Linolenic acid
- D. Palmitic acid
Explanation: Oleic acid contains one carbon-carbon double bond, making it monounsaturated.
Correct answer: Oleic acid- A. Fructose
- B. Galactose
- C. Sucrose
- D. None of the above
Explanation: Cerebrosides are glycosphingolipids containing a single sugar, usually galactose in nervous tissue or glucose in some other tissues.
Correct answer: Galactose- A. Cholesterol
- B. FFA
- C. Lipoprotein
- D. Triglycerides
Explanation: Triglycerides accumulate in fatty liver when hepatic fatty-acid uptake and synthesis exceed oxidation and export in lipoproteins.
Correct answer: Triglycerides- A. Propionyl CoA
- B. Malonyl CoA
- C. Aceto acetyl CoA
- D. Fumaryl CoA
Explanation: Odd-chain fatty-acid oxidation ends with propionyl-CoA after repeated removal of two-carbon acetyl-CoA units.
Correct answer: Propionyl CoA15. The substance essential for transfter of fatty acids across mitochondrial membrance_____________?
- A. Creatine
- B. Carnitine
- C. Creatinine
- D. Coenzyme A
Explanation: Long-chain fatty acids cross the inner mitochondrial membrane through the carnitine shuttle.
Correct answer: Carnitine- A. Glycerol
- B. Glucose
- C. Acetyl-CoA
- D. Acetone
Explanation: Ketone bodies are synthesized in the liver mitochondria from excess acetyl-CoA produced mainly by fatty-acid beta-oxidation.
Correct answer: Acetyl-CoA- A. Carbohydrate
- B. Protein
- C. All of the above
- D. Fat
Explanation: Ketone bodies are produced mainly when fatty-acid oxidation supplies more acetyl-CoA than the citric acid cycle can use, such as during…
Correct answer: Fat- A. Acetoacetic acid and beta hydroxyl butyric acid
- B. Acetoacetic acid and oxalocacetic acid
- C. Acetoacetic acid and alpha ketoglutaric acid
- D. Acetoacetic acid and pyruvic acid
Explanation: The major ketone bodies increased in diabetic ketoacidosis are acetoacetic acid and beta-hydroxybutyric acid; acetone is the third ketone…
Correct answer: Acetoacetic acid and beta hydroxyl butyric acid- A. HMG CoA reductase
- B. HMG CoA lyase
- C. HMG CoA synthetase
- D. Mevalonate synthetase
Explanation: HMG-CoA reductase catalyses the conversion of HMG-CoA to mevalonate and is the rate-limiting, highly regulated step of cholesterol…
Correct answer: HMG CoA reductase- A. Cholesterol
- B. Pyruvate
- C. Mevalonate
- D. Acetyl CoA
Explanation: The cholesterol-synthesis pathway begins with acetyl-CoA and proceeds through HMG-CoA and mevalonate to cholesterol.
Correct answer: PyruvateLipids MCQs: common questions
Are these Lipids MCQs free?
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There are 52 Lipids MCQs in the Biochemistry bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Lipids MCQ have an explanation?
Yes. Each Lipids question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
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