BIO CHEMISTRY MCQs (PART 2) by General knowledge Solutions
BIO CHEMISTRY MCQs (PART 2) by General knowledge Solutions
1. Depot fats of mammalian cells comprise mostly of
2. When choline of lecithine is replaced by ethanolamine the product is
3. Which of the following is a hydroxy fatty acid?
4. Acrolein test is answered by
5. The smell of fat turned rancid is due to
6. Phospholipids are important cell membrane components because
7. Which one of the following is not a phospholipid?
Correct Answer:D
8. A fatty acid which is not synthesized in human body and has to be supplied in the diet:
9. In cephalin, choline is replaced by
Correct Answer:B
10. The triacyl glycerol present in plasma lipoproteins are hydrolyzed by
11. Amphiphatic lipids are
12. Which of the following is not essential fatty acid?
13. The calorific value of lipid is
- (A) Cholesterol
- (B) Cholesterol esters
- (C) Triacyl glycerol
- (D) Phospholipids
2. When choline of lecithine is replaced by ethanolamine the product is
- (A) Sphingomyelin
- (B) Cephalin
- (C) Plasmalogens
- (D) Lysolecithine
3. Which of the following is a hydroxy fatty acid?
- (A) Oleic acid
- (B) Ricinoleic acid
- (C) Caproic acid
- (D) Stearic acid
4. Acrolein test is answered by
- (A) Cholesterol
- (B) Glycerol
- (C) Glycosides
- (D) Sphingol
5. The smell of fat turned rancid is due to
- (A) Presence of vit E
- (B) Presence of quinones
- (C) Phenols
- (D) Volatile fatty acids
6. Phospholipids are important cell membrane components because
- (A) They have glycerol
- (B) They can form bilayers in water
- (C) They have both polar and non polar potions
- (D) They combine covalently with proteins
7. Which one of the following is not a phospholipid?
- (A) Lecithin
- (B) Plasmalogen
- (C) Lysolecithin
- (D) Gangliosides
Correct Answer:D
8. A fatty acid which is not synthesized in human body and has to be supplied in the diet:
- (A) Palmitic acid
- (B) Oleic acid
- (C) Linoleic acid
- (D) Stearic acid
9. In cephalin, choline is replaced by
- (A) Serine
- (B) Ethanolamine
- (C) Betaine
- (D) Sphingosine
Correct Answer:B
10. The triacyl glycerol present in plasma lipoproteins are hydrolyzed by
- (A) Linqual lipase
- (B) Pancreatic lipase
- (C) Colipase
- (D) Lipoprotein lipase
11. Amphiphatic lipids are
- (A) Hydrophilic
- (B) Hydrophobic
- (C) Both (A) and (B)
- (D) Lipophilic
12. Which of the following is not essential fatty acid?
- (A) Oleic acid
- (B) Linoleic acid
- (C) Arachidonic acid
- (D) Linolenic acid
13. The calorific value of lipid is
- (A) 4.0 Kcal/gm
- (B) 6.0 Kcal/gm
- (C) 9.0 Kcal/gm
- (D) 15 Kcal/gm
Correct Answer:C
14. Rancidity of butter is prevented by the addition of
14. Rancidity of butter is prevented by the addition of
- (A) Vitamin D
- (B) Tocopherols
- (C) Presence of priotin
- (D) Presence of ‘Cu’
Correct Answer:B
15. Sphingomyelins on hydrolysis yields
- (A) Glycerol, fatty acids, phosphoric acid and choline
- (B) Glycerol, sphingosine, choline and fatty acids
- (C) Sphingosine, phosphoric acid, Glycerol and inositol
- (D) Sphingosine, fatty acids, phosphoric acid and choline
16. Inherited deficiency of enzyme cerebrosidase produces
- (A) Fabry’s disease
- (B) Niemann pick disease
- (C) Gaucher’s disease
- (D) Tay-sach’s disease
17. Phosphatidic acid on hydrolysis yields
- (A) Glycerol, fatty acids, phosphoric acid, choline
- (B) Glycerol, fatty acids, phosphoric acid
- (C) Glycerol, fatty acids, phosphoric acid, Glucose
- (D) Sphingol, fatty acids, phosphoric acid
18. The maximum number of double bonds present in essential fatty acid is
- (A) 1
- (B) 2
- (C) 3
- (D) 4
19. Cerebrosides are composed of
- (A) Sphingosine, fatty acids, glycerol and phosphoric acid
- (B) Sphingosine, fatty acids, galactose
- (C) Glycerol, fatty acids, galactose
- (D) Glycerol, fatty acids, galactose, sphingol
20. Acetoacetic acid and β-OH butyric acid are formed as
- (A) Kidneys
- (B) Heart
- (C) Liver
- (D) Intestine
21. Which amino acid is a lipotropic factor?
- (A) Lysine
- (B) Leucine
- (C) Tryptophan
- (D) Methionine
22. The class of lipoproteins having a beneficial effect in atherosclerosis is
- (A) Low density of lipoproteins
- (B) very low density lipoproteins
- (C) High density lipoproteins
- (D) Chylomicrons
23. Cholesterol is the precursor for the biosynthesis of
- (A) fatty acid
- (B) prostaglandins
- (C) bile acids
- (D) sphingmyelin
24. Which of the following condition is characterized by ketonuria but without glycosuria?
- (A) Diabetes mellitus
- (B) Diabetes insipidus
- (C) Prolonged starvation
- (D) Addison’s disease
25. Ketone bodies are formed in
- (A) Kidney
- (B) Liver
- (C) Heart
- (D) Intestines
26. Changes in serum high density lipoproteins (HDL) are more truly reflected by those of
- (A) HDL-1
- (B) HDL-2
- (C) HDL-3
- (D) HDLC
27. Mitochondrial lipogenesis requires
- (A) bicarbonate
- (B) biotin
- (C) acetyl CoA carboxylase
- (D) NADPH
28. Fatty acids having chain length of 10 carbon atoms enter the
- (A) Portal ciruclation
- (B) Lacteals
- (C) Systemic circulation
- (D) Colon
29. A soluble system for synthesis of fatty acids have been isolated from avian liver, required for the formation of long chain fatty acids by this system is
- (A) ATP
- (B) Acetyl CoA
- (C) NADPH
- (D) All of these
30. Most animal tissues contain appreciable amounts of lipid, when in the form of depot fat it consists largely of
- (A) Cholesterol ester
- (B) Phosphatides
- (C) Chylomicrons
- (D) Triacylglycerol
31. A fatty acid not synthesized in man is
- (A) Oleic
- (B) Palmitic
- (C) Linoleic
- (D) Stearic
Correct Answer:C
32. The ‘free fatty acids’ (FFA) of plasma:
- (A) metabolically inert
- (B) mainly bound to β-lipoproteins
- (C) stored in the fat
- (D) mainly bound to serum albumin
33. Adipose tissue which is a store house for triacyl glycerol synthesis the same using
- (A) The glycerol released by hydrolysis of triacyl glycerol
- (B) The glycerol-3-phosphate obtained in the metabolism of glucose
- (C) 2-phosphoglycerate
- (D) 3-phosphoglycerate
Correct Answer:B
34. Increase in blood of this class of lipoproteins is beneficial to ward off coronary heart disease:
- (A) HDL
- (B) LDL
- (C) VLDL
- (D) IDL
35. In the extra mitochondrial synthesis of fatty acids, CO2 is utilized
- (A) To keep the system anaerobic and prevent regeneration of acetyl CoA
- (B) In the conversion of malonyl to CoA hydroxybutyryl CoA
- (C) In the conversion of acetyl CoA to malonyl CoA
- (D) In the formation of acetyl CoA from 1 carbon intermediates
36. Current concepts concerning the intestinal absorption of triacylglycerols are that
- (A) They must be completely hydrolysed before the constituent fatty acids can be absorbed
- (B) They are hydrolysed partially and the material absorbed consists of free fatty acids, mono and diacyl glycerols and unchanged triacyl glycerols
- (C) Fatty acids with less than 10 carbon atoms are absorbed about equally via lymph and via portal blood
- (D) In the absence of bile the hydrolysis of triacyl glycerols is absorbed
Correct Answer:B
37. Main metabolic end product of cholesterol:
- (A) Coprosterol
- (B) 5-pregnenolone
- (C) Bile acid
- (D) Glycine
Correct Answer:C
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