BIO CHEMISTRY MCQs (PART 3)

BIO CHEMISTRY MCQs (PART 3)

1.       An example of a hydroxy fatty acid is

(A) Ricinoleic acid

(B) Crotonic acid

(C) Butyric acid

(D) Oleic acid

 2. An example of a saturated fatty acid is

(A) Palmitic acid

(B) Oleic acid

(C) Linoleic acid

(D) Erucic acid

3. If the fatty acid is esterified with an alcohol of high molecular weight instead of glycerol, the resulting compound is

(A) Lipositol

(B) Plasmalogen

 (C) Wax

(D) Cephalin

 4. A fatty acid which is not synthesized in the body and has to be supplied in the diet is

(A) Palmitic acid

(B) Lauric acid

(C) Linolenic acid

(D) Palmitoleic acid

 5. Essential fatty acid:

(A) Linoleic acid

(B) Linolenic acid

(C) Arachidonic acid

(D) All these

 6. The fatty acid present in cerebrosides is

(A) Lignoceric acid

(B) Valeric acid

(C) Caprylic acid

 (D) Behenic acid

 7. The number of double bonds in arachidonic acid is

(A) 1

(B) 2

(C) 4

(D) 6

8. In humans, a dietary essential fatty acid is

(A) Palmitic acid

(B) Stearic acid

(C) Oleic acid

(D) Linoleic acid

9. A lipid containing alcoholic amine residue is

(A) Phosphatidic acid

(B) Ganglioside

(C) Glucocerebroside

(D) Sphingomyelin

10. Cephalin consists of

 (A) Glycerol, fatty acids, phosphoric acid and choline

(B) Glycerol, fatty acids, phosphoric acid and ethanolamine

 (C) Glycerol, fatty acids, phosphoric acid and inositol

(D) Glycerol, fatty acids, phosphoric acid and serine

 11. In mammals, the major fat in adipose tissues is

(A) Phospholipid

(B) Cholesterol

 (C) Sphingolipids

(D) Triacylglycerol

12. Glycosphingolipids are a combination of

(A) Ceramide with one or more sugar residues

(B) Glycerol with galactose

(C) Sphingosine with galactose

(D) Sphingosine with phosphoric acid

13. The importance of phospholipids as constituent of cell membrane is because they possess (A) Fatty acids

(B) Both polar and nonpolar groups

 (C) Glycerol

 (D) Phosphoric acid

14. In neutral fats, the unsaponificable matter includes

(A) Hydrocarbons

(B) Triacylglycerol

(C) Phospholipids

(D) Cholsesterol

 15. Higher alcohol present in waxes is

(A) Benzyl

(B) Methyl

(C) Ethyl

 (D) Cetyl

 16. Kerasin consists of

 (A) Nervonic acid

(B) Lignoceric acid

(C) Cervonic acid

(D) Clupanodonic acid

 17. Gangliosides are complex glycosphingolipids found in

 (A) Liver

(B) Brain

 (C) Kidney

(D) Muscle

 18. Unsaturated fatty acid found in the cod liver oil and containing 5 double bonds is

 (A) Clupanodonic acid

(B) Cervonic acid

(C) Elaidic acid

(D) Timnodonic acid

19. Phospholipid acting as surfactant is

(A) Cephalin

(B) Phosphatidyl inositol

 (C) Lecithin

 (D) Phosphatidyl serine

 20. An oil which contains cyclic fatty acids and once used in the treatment of leprosy is

(A) Elaidic oil

(B) Rapeseed oil

(C) Lanoline

(D) Chaulmoogric oil

 21. Unpleasant odours and taste in a fat (rancidity) can be delayed or prevented by the addition of

(A) Lead

 (B) Copper

(C) Tocopherol

(D) Ergosterol

 22. Gangliosides derived from glucosylceramide contain in addition one or more molecules of (A) Sialic acid

(B) Glycerol

(C) Diacylglycerol

(D) Hyaluronic acid

 23. ’Drying oil’, oxidized spontaneously by atmospheric oxygen at ordinary temperature and forms a hard water proof material is

(A) Coconut oil

(B) Peanut oil

(C) Rape seed oil

(D) Linseed oi

l 24. Deterioration of food (rancidity) is due to presence of

(A) Cholesterol

(B) Vitamin E

(C) Peroxidation of lipids

(D) Phenolic compounds

 25. The number of ml of N/10 KOH required to neutralize the fatty acids in the distillate from 5 gm of fat is called

(A) Reichert-Meissel number

(B) Polenske number

(C) Acetyl number

(D) Non volatile fatty acid number

 26. Molecular formula of cholesterol is

(A) C27H45OH

(B) C29H47OH

(C) C29H47OH

(D) C23H41OH

27. The cholesterol molecule is

(A) Benzene derivative

(B) Quinoline derivative

(C) Steroid

(D) Straight chain acid

28. Salkowski test is performed to detect

(A) Glycerol

(B) Cholesterol

(C) Fatty acids

(D) Vitamin D

29. Palmitic, oleic or stearic acid ester of cholesterol used in manufacture of cosmetic creams is (A) Elaidic oil

(B) Lanoline

 (C) Spermaceti

 (D) Chaulmoogric oil

30. Dietary fats after absorption appear in the circulation as

(A) HDL

(B) VLDL

(C) LDL

(D) Chylomicron

 31. Free fatty acids are transported in the blood

(A) Combined with albumin

(B) Combined with fatty acid binding protein

(C) Combined with β -lipoprotein

(D) In unbound free salts

32. Long chain fatty acids are first activated to acetyl-CoA in

(A) Cytosol

(B) Microsomes

(C) Nucleus

(D) Mitochondria

33. The enzyme acyl-CoA synthase catalyses the conversion of a fatty acid of an active fatty acid in the presence of

(A) AMP

(B) ADP

(C) ATP

(D) GTP

 34. Carnitine is synthesized from

(A) Lysine and methionine

 (B) Glycine and arginine

(C) Aspartate and glutamate

(D) Proline and hydroxyproline

 35. The enzymes of β-oxidation are found in

(A) Mitochondria

(B) Cytosol

(C) Golgi apparatus

(D) Nucleus

36. Long chain fatty acids penetrate the inner mitochondrial membrane

(A) Freely

(B) As acyl-CoA derivative

(C) As carnitine derivative

(D) Requiring Na dependent carrier

37. An important feature of Zellweger ’s syndrome is

(A) Hypoglycemia

(B) Accumulation of phytanic acid in tissues

(C) Skin eruptions

(D) Accumulation of C26-C38 polyenoic acid in brain tissues

38. An important finding of Fabry’s disease is

(A) Skin rash

(B) Exophthalmos

 (C) Hemolytic anemia

 (D) Mental retardation

39. Gaucher’s disease is due to deficiency of the enzyme:

 (A) Sphingomyelinase

(B) Glucocerebrosidase

(C) Galactocerbrosidase

(D) β-Galactosidase

 40. Character ist ic f ind ing in Gaucher ’s disease is

 (A) Night blindness

(B) Renal failure

(C) Hepatosplenomegaly

(D) Deafnes

s 41. An important finding in Neimann-Pick disease is

 (A) Leukopenia

 (B) Cardiac enlargement

(C) Corneal opacity

(D) Hepatosplenomegaly

42. Fucosidosis is characterized by

(A) Muscle spasticity

 (B) Liver enlargement

(C) Skin rash

(D) Kidney failure

 43. Metachromatic leukodystrophy is due to deficiency of enzyme:

 (A) α-Fucosidase

 (B) Arylsulphatase A

 (C) Ceramidase

 (D) Hexosaminidase A

 44. A significant feature of Tangier disease is

(A) Impairment of chylomicron formation

(B) Hypotriacylglycerolmia

 (C) Absence of Apo-C-II

(D) Absence of Apo-C-I

 45. A significant feature of Broad Beta disease is

(A) Hypocholesterolemia

(B) Hypotriacylglycerolemia

(C) Absence of Apo-D

(D) Abnormality of Apo-E