BIO CHEMISTRY MCQs by General knowledge Solutions

BIO CHEMISTRYMCQs  by General knowledge Solutions

                                                                       

     

00. Mitochondrial α-ketoglutarate dehydrogenase complex requires all the following to function except 

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

01. Each of the following can be an intermediate in the synthesis of phosphatidyl choline except

• (A) Phosphatidyl inositol
• (B) CDP-choline
• (C) Phosphatidyl ethanolamine
• (D) Diacylglycerol

02. High iodine value of a lipid indicates

• (A) Polymerization
• (B) Carboxyl groups
• (C) Hydroxyl groups
• (D) Unsaturation

03. Cholesterol, bile salts, vitamin D and sex hormones are

• (A) Mucolipids
• (B) Glycolipids
• (C) Phospholipids
• (D) Isoprenoid lipids

04. Water soluble molecular aggregates of lipids are known as

• (A) Micelle
• (B) Colloids
• (C) Sphingol
• (D) Mucin

05. Hypoglycemia depresses insulin secretion and thus increases the rate of

• (A) Hydrolysis
• (B) Reduction
• (C) Gluconeogenesis
• (D) Respiratory acidosis

06. The process of breakdown of glycogen to glucose in the liver and pyruvate and lacate in the muscle is known as

• (A) Glyogenesis
• (B) Glycogenolysis
• (C) Gluconeogenesis
• (D) Cellular degradation

07. Across a membrane phospholipids act as carrier of

• (A) Organic compounds
• (B) Inorganic ions
• (C) Nucleic acids
• (D) Food materials

08. Osteomalacia can be prevented by the administration of calcium and a vitamin:

• (A) A
• (B) B
• (C) C
• (D) D

09. Milk sugar is known as

• (A) Fructose
• (B) Glucose
• (C) Sucrose
• (D) Lactose

10. The Instrinisic Factor (HCl and mucoproteins) present in the gastric juice help in the absorption of 

• (A) Vitamin B2
• (B) Tocopherols
• (C) Folic acid
• (D) Vitmain B12

11. Lipase can act only at pH:

• (A) 2.5–4
• (B) 3.5–5
• (C) 4 to 5
• (D) 5–7

12. Bile is produced by

• (A) Liver
• (B) Gall-bladder
• (C) Pancreas
• (D) Intestine

13. Non-protein part of rhodopsin is

• (A) Retinal
• (B) Retinol
• (C) Carotene
• (D) Repsin

14. A pathway that requires NADPH as a cofactor is

• (A) Extramitochondrial folic acid synthesis
• (B) Ketone body formation
• (C) Glycogenesis
• (D) Gluconeogenesis

15. LCAT activity is associated with which of the lipo-protein complex?

• (A) VLDL
• (B) Chylomicrones
• (C) IDL
• (D) HDL

16. In β−oxidation of fatty acids which of the following are utilized as co-enzymes?

• (A) NAD+ and NADP+
• (B) FAD H2 and NADH + H+
• (C) FAD and FMN
• (D) FAD and NAD+

17. The lipoprotein with the fastest electrophoretic mobility and lowest TG content are

• (A) VLDL
• (B) LDL
• (C) HDL
• (D) Chylomicrones

518. The essential fatty acids retard

• (A) Atherosclerosis
• (B) Diabetes mellitus
• (C) Nepritis
• (D) Oedema

19. The majority of absorbed fat appears in the forms of

• (A) HDL
• (B) Chylomicrone
• (C) VLDL
• (D) LDL

20. Daily output of urea in grams is

•  (A) 10 to 20
• (B) 15 to 25
• (C) 20 to 30
• (D) 35 to 45

21. Uremia occurs in

• (A) Cirrohsis of liver
•  (B) Nephritis
• (C) Diabetes mellitus
• (D) Coronary thrombosis

22. Carboxyhemoglobin is formed by

• (A) CO
• (B) CO2
• (C) HCO3
• (D) HCN

23. Methemoglobin is formed as a result of the oxidation of haemoglobin by oxidation agent:

• (A) Oxygen of Air
• (B) H2O2
• (C) K4Fe
• (CN)6
• (D) KMnO4

24. Methemoglobin can be reduced to haemoglobin by

• (A) Removal of hydrogen
• (B) Vitamin C
• (C) Glutathione
• (D) Creatinine

25. Fats are solids at

• (A) 10°C
• (B) 20°C
• (C) 30°C
• (D) 40°C

26. Esters of fatty acids with higher alcohol other than glycerol are called as

• (A) Oils
• (B) Polyesters
• (C) Waxes
• (D) Terpenoids

27. The main physiological buffer in the blood is

• (A) Haemoglobin buffer
• (B) Acetate
• (C) Phosphate
• (D) Bicarbonate

28. All of the following substances have been used to estimate GFR except

• (A) Inulin
• (B) Creatinine
• (C) Phenol red
• (D) Mannitol

29. Relationship between GFR and seum creatinine concentration is

• (A) Non-existent
• (B) Inverse
• (C) Direct
• (D) Indirect

30. Urine turbidity may be caused by any of the following except

• (A) Phosphates
• (B) Protein
• (C) RBC
• (D) WBC

31. Urine specific gravity of 1.054 indicates

• (A) Excellent renal function
• (B) Inappropriate secretion of ADH
• (C) Extreme dehydration
• (D) Presence of glucose or protein

32. In hemolytic jaundice, the urinary bilirubin is

• (A) Normal
• (B) Absent
• (C) More than normal
• (D) Small amount is present

33. In obstructive jaundice, urinary bilirubin is

• (A) Absent
• (B) Increased
• (C) Present
• (D) Present in small amount

34. In hemolytic jaundice, bilirubin in urine is

• (A) Usually absent
• (B) Usually present
• (C) Increased very much
• (D) Very low

35. The pH of gastric juice of infants is

•  (A) 2.0
• (B) 4.0
• (C) 4.5
• (D) 5.0

36. The pH of blood is about 7.4 when the ratio between (NaHCO3) and (H2CO3) is

• (A) 10 : 1
• (B) 20 : 1
• (C) 25 : 1
• (D) 30 : 1

37. The absorption of glucose is decreased by the deficiency of

• (A) Vitamin A
• (B) Vitamin D
• (C) Thiamine
• (D) Vitamin B12

38. For the activity of amylase which of the following is required as co-factor?

•  (A) HCO3
• (B) Na+
• (C) K+
• (D) Cl

39. Which of the following hormone increases the absorption of glucose from G.I.T?

• (A) Insulin
• (B) Throid hormones
• (C) Glucagon
• (D) FSH

 40. Predominant form of storage:

• (A) Carbohydrates
• (B) Fats
• (C) Lipids
• (D) Both (B) and (C)

 41. Degradations of Hb takes place in

• (A) Mitochondrion
• (B) Erythrocytes
• (C) Cytosol of cell
• (D) R.E. cells

42. Biluveridin is converted to bilirubin by the process of

• (A) Oxidation
• (B) Reduction
• (C) Conjugation
• (D) Decarboxylation

 43. Amylase present in saliva is

• (A) α-Amylase
• (B) β-Amylae
• (C) γ -Amylase
• (D) All of these

 44. Phospholipids are important cell membrane components since

• (A) They have glycerol
• (B) Form bilayers in water
• (C) Have polar and non-polar portions
• (D) Combine covalently with proteins

45. Which of the following is not a phospholipids?

• (A) Lecithin
• (B) Plasmalogen
• (C) Lysolecithin
• (D) Gangliosides

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

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

 47. Phospholipids occur in

• (A) Myelin sheath
• (B) Stabilizes chylomicrans
• (C) Erythrocyte membrane
• (D) All of these

00. D 01. A 02. D 03. D 04. A 05. C 06. B 07. B 08. D 09. D 10. D 11. D 12. A 13. A 14. A 15. D 16. D 17. C 18. A 19. B 20. C 21. B 22. A 23. C 24. B 25. B 26. C 27. D 28. C 29. B 530. B 531. D 532. C 533. B 534. A 535. D 536. B 537. C 538. D 539. B 540. D 541. D 542. B 543. A 544. C 545. D 46. C 47. D