BIO CHEMISTRY MCQs (PART 1) by General knowledge Solutions

BIO CHEMISTRY MCQs (PART 1)  by General knowledge Solutions

                                     

1. Waxes contain higher alcohols named as

• (A) Methyl 
• (B) Ethyl 
• (C) Phytyl 
• (D) Cetyl 

Correct  Answer:D

2. Lieberman-Burchard reaction is performed to detect 

• (A) Cholesterol 
• (B) Glycerol 
• (C) Fatty acid 
• (D) Vitamin D 

Correct  Answer:A

3. Lipose present in the stomach cannot hydrolyze fats owing to

• (A) Alkalinity 
• (B) Acidity 
• (C) High acidity 
• (D) Neutrality 

Correct  Answer:C

4. Fatty acids are oxidized by 

• (A) α -oxidation 
• (B) β -oxidation 
• (C) ω -oxidation 
• (D) All of these

Correct  Answer:D

 5. The fatty acids containing even number and odd number of carbon atoms as well as the unsaturated fatty acids are oxidized by 

• (A) α-oxidation
• (B) β-oxidation 
• (C) ω-oxidation 
• (D) All of these

Correct  Answer:B

 6. Long chain fatty acids are first activated to acyl CoA in the 

• (A) Cytosol 
• (B) Mitochodria 
• (C) Ribosomes 
• (D) Microsome 

Correct  Answer:A

7. Long chain acyl CoA penetrates mitochondria in the presence of 

• (A) Palmitate 
• (B) Carnitine 
• (C) Sorbitol 
• (D) DNP

Correct  Answer:B

 8. Acyl-CoA dehydrogenase converts Acyl CoA to α-β unsaturated acyl-CoA in presence of the coenzyme:

• (A) NAD+ 
• (B) NADP+ 
• (C) ATP 
• (D) FAD 

Correct  Answer:D


9. For the activation of long chain fatty acids the enzyme thiokinase requires the cofactor: 

• (A) Mg++ 
• (B) Ca++ 
• (C) Mn++ 
• (D) K+ 

Correct  Answer:B

10. ω-oxidation takes place by the hydroxylase in microsomes involving 

• (A) Cytochrome b 
• (B) Cytochrome c 
• (C) Cytochrome p-4500
• (D) Cytochrome a3 

Correct  Answer:C

11. Carboxylation of acetyl—CoA to malonyl — CoA takes place in presence of 

• (A) FAD+ 
• (B) Biotin 
• (C) NAD+ 
• (D) NADP+

Correct  Answer:C


 12. Malonyl-CoA reacts with the central 

• (A) —SH group 
• (B) —NH2 group 
• (C) —COOH group 
• (D) —CH2OH group

Correct  Answer:A

 13. Fatty acid synthesis takes place in the presence of the coenzyme: 

• (A) NAD+
•  (B) Reduced NAD 
• (C) NADP+ 
• (D) Reduced NADP

Correct  Answer:D


 14. Fatty acids are activated to acyl CoA by the enzyme thiokinase: 

• (A) NAD+ 
• (B) NADP+ 
• (C) CoA 
• (D) FAD+ 

Correct  Answer:C

15. Phospholipids help the oxidation of 

• (A) Glycerol 
• (B) Fatty acids 
• (C) Glycerophosphates
• (D) None of these

Correct  Answer:B

 16. The desaturation and chain elongation system of polyunsaturated fatty acids are greatly diminished in the absence of

• (A) Insulin 
• (B) Glycagon
•  (C) Epinephrine 
• (D) Thyroxine

Correct  Answer:A

 17. Prostaglandins are liberated in the circulation by the stimulation of 

• (A) Anterior pituitary glands 
• (B) Posterior pituitary glands 
• (C) Adrenal gland 
• (D) Thyroid gland 

Correct  Answer:C


18. Prostaglandins have a common structure based on prostanoic acid which contains carbon atoms:

• (A) 12 
• (B) 16 
• (C) 18 
• (D) 20 

Correct  Answer:D

19. The carbon chains of prostanoic acid are bonded at the middle of the chain by a 

• (A) 5-membered ring 
• (B) 6-membered ring 
• (C) 8-membered ring 
• (D) None of these

Correct  Answer:B

 20. All active prostaglandins have atleast one double bond between positions: 

• (A) 7 and 8
•  (B) 9 and 10
•  (C) 11 and 12 
• (D) 13 and 14

Correct  Answer:A


21. The enzyme systems for lengthening and shortening for saturating and desaturating of fatty acids occur in 

• (A) Intestine 
• (B) Muscle 
• (C) Kidney 
• (D) Liver  

Correct  Answer:D

22. Which of the following are classified as essential fatty acids?

• (A) Arachidonic acid 
• (B) Oleic acid 
• (C) Acetic acid 
• (D) Butyric acid 

Correct  Answer:A

23. Prostaglandins are synthesized in the body from

• (A) Myristic acid 
• (B) Arachidonic acid 
• (C) Stearic acid 
• (D) Lignoceric acid 

Correct  Answer:D

24. All the following saturated fatty acids are present in buffer except 

• (A) Butyric acid 
• (B) Capryllic acid 
• (C) Caproic acid 
• (D) Capric acid

Correct  Answer:C

 25. Biological functions of lipids include 

• (A) Source of energy 
• (B) Insulating material 
• (C) Maintenance of cellular integrity 
• (D) All of these

Correct  Answer:D

 26. Saponification number is 

• (A) mg of KOH required to saponify one gm of fat or oil 
• (B) mg of KOH required to neutralize free fatty acids of one gms of fat 
• (C) mg of KOH required to neutralize the acetic acid obtained by saponification of one gm of fat after it has been acetylated 
• (D) None of these 

Correct  Answer:C

27. Lipids have the following properties: 

• (A) Insoluble in water and soluble in fat solvent 
• (B) High energy content 
• (C) Structural component of cell membrane 
• (D) All of these 

Correct  Answer:D


28. Carbohydrate moiety in cerebrosides is 

• (A) Glucose 
• (B) Sucrose 
• (C) Galactose 
• (D) Maltose 

Correct  Answer:B

29. Which of the following is not an unsaturated fatty acid?

• (A) Oleic acid 
• (B) Stearic acid 
• (C) Linaoleic acid 
• (D) Palmitic acid 

Correct  Answer:B

30. All the following are functions of prostaglandins except 

• (A) Lowering of B.P 
• (B) Introduction of labour 
• (C) Anti inflammatory 
• (D) Prevention of myocardial infraction 

Correct  Answer:D

31. Calorific value of lipids per gm is 

• (A) 4 Kcal 
• (B) 8 Kcal 
• (C) 9 Kcal 
• (D) None of these 

Correct  Answer:C

32. Fatty acid present in kerotin is 

• (A) Lignoceric acid 
• (B) Cerebromic acid 
• (C) Nervonic acid 
• (D) Hydroxynervonic acid

Correct  Answer:A

 33. All the following are ketones except

• (A) Xylulose
• (B) Ribolose 
• (C) Erythrose 
• (D) Fructose 

Correct  Answer:C

34. Saponification:

• (A) Hydrolysis of fats by alkali 
• (B) Hydrolysis of glycerol by liposes 
• (C) Esterification 
• (D) Reduction 

Correct  Answer:A

35. Number of ml of 0.1 N KOH required to neutralize fatty acids from 5 gms of fat:

• (A) Iodine number 
• (B) Polenske number 
• (C) Reichert-Miessl number 
• (D) None of these

Correct  Answer:B

 36. Hydrated density of HD lipoproteins is 

• (A) 0.94 gm/ml 
• (B) 0.94–1.006 gm/ml
• (C) 1.006–1.063 gm/ml 
• (D) 1.063–1.21 gm/ml 

Correct  Answer:D

37. Saponification number indicates 

• (A) Unsaturation in fat 
• (B) Average M.W of fatty acid 
• (C) Acetyl number 
• (D) Acid number

Correct  Answer:B

38. Acrolein Test is positive for 

• (A) Glycerol 
• (B) Prostaglandins 
• (C) Carbohydrates 
• (D) Proteins 

Correct  Answer:A

39. Iodine number denotes 

• (A) Degree of unsaturation 
• (B) Saponification number 
• (C) Acid number 
• (D) Acetyl number 

Correct  Answer:A

40. Maximum energy produced by 

• (A) Fats 
• (B) Carbohydrates 
• (C) Proteins 
• (D) Nucleic acids

Correct  Answer:A

 41. Lecithins are composed of

• (A) Glycerol + Fatty acids + Phosphoric acid + Choline 
• (B) Glycerol + Fatty acids + Phosphoric acid + Ethanolamine 
• (C) Glycerol + Fatty acids + Phosphoric acid + Serine 
• (D) Glycerol + Fatty acids + Phosphoric acid + Beaine

Correct  Answer:A

 42. Sphingomyelins are composed of fatty acids, phosphoric acid and 

• (A) Sphingosine and choline 
• (B) Glycerol and sphingosine 
• (C) Glycerol and Serine 
• (D) Glycerol and Choline

Correct  Answer:A

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