Biology MCQs (part 3) by General knowledge Solutions

Biology MCQs (part 3)  by General knowledge Solutions

                                                                           

00. Tubular reabsorption of calcium is increased by

• (A) Cholecalciferol
• (B) 25-Hydroxycholecalciferol
• (C) Calcitriol
• (D) All of these

01. Parathormone is required for the conversion of

• (A) Cholecalciferol into 1-hydroxycholecalciferol
• (B) Cholecalciferol into 25-hydroxycholecalciferol
• (C) 25-Hydroxycholecalciferol into calcitriol
• (D) Cholesterol into 7-dehydrocholesterol

02. Calcitriol inhibits the conversion of

• (A) Cholesterol into 7-dehydrocholesterol
• (B) Cholecalciferol into 1-hydroxycholecalciferol
• (C) Cholecalciferol into 25-hydroxycholecalciferol
• (D) 25-Hydroxycholecalciferol into 1,25- dihydroxycholecalciferol

03. Bowlegs and knock-knees can occur in

• (A) Rickets
• (B) Osteomalacia
• (C) Both A and B
• (D) Hypervitaminosis D

04. Calcification of soft tissues can occur in

• (A) Osteomalacia
•  (B) Rickets
• (C) Hypervitaminosis D
• (D) None of these

05. Levels of serum calcium and inorganic phosphorus are increased in

•  (A) Hypervitaminosis D
•  (B) Hypoparathyroidism
• (C) Hypovitaminosis D
• (D) None of these

06. Requirement of vitamin E increases with the increasing intake of

•  (A) Calories
• (B) Proteins
• (C) PUFA
• (D) Cholesterol

07. In human beings, vitamin E prevents

• (A) Sterility
•  (B) Hepatic necrosis
•  (C) Muscular dystrophy
• (D) None of these

08. Vitamin E protects

• (A) Polyunsaturated fatty acids against aperoxidation
• (B) Vitamin A and carotenes against oxidation
• (C) Lung tissue against atmospheric pollutants
• (D) All of these

09. Intestinal bacteria can synthesise

•  (A) Phyllogquinone
• (B) Farnoquinone
• (C) Both (A) and (B)
• (D) Menadione

10. A water soluble form of vitamin K is

• (A) Phylloquinone
•  (B) Farnoquinone
• (C) Menadione
• (D) None of these

11. Prothrombin time is prolonged in

• (A) Vitamin K deficiency
• (B) Liver damage
• (C) Both (A) and (B)
• (D) None of these

12. A synthetic form of vitamin K is

• (A) Menadione
• (B) Farnoquinone
• (C) Phylloquinone
• (D) None of these

13. Retinal is reduced to retinol by retinene reductase in presence of the coenzyme

• (A) NAD+
• (B) NADP+
• (C) NADH + H+
• (D) NADPH + H+

14. Retinal exists as an ester with higher fatty acids in the

• (A) Liver
• (B) Kidney
• (C) Lung
• (D) All of these

15. Retinol is transported to the blood as retinol attached to

• (A) α1-globulin
•  (B) α2-globulin
• (C) β-globulin
•  (D) γ-globulin

16. Carotenes are transported with the

•  (A) Minerals
• (B) Proteins
• (C) Lipids
• (D) Lipoproteins

17. The drugs that form complexes with pyridoxal are

• (A) Isoniazid
• (B) Penicillamine
•  (C) Rifampicin
• (D) Both (A) and (B)

18. In the blood the vitamin esters are attached to

• (A) α1-lipoproteins
• (B) α2-lipoproteins
• (C) β-lipoproteins
• (D) γ-lipoproteins

19. The percentage of Vitamin A in the form of esters is stored in the liver:

•  (A) 80
• (B) 85
• (C) 90
• (D) 95

 20. The performed Vitamin A is supplied by foods such as

• (A) Butter
•  (B) Eggs
• (C) Fish liver oil
• (D) All of these

21. The non-protein part of rhodopsin is

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

22. Lumirhodopsin is stable only at a temperature below

• (A) –35°C
• (B) –40°C
• (C) –45°C
• (D) –50°C

23 The normal concentration of vitamin A in blood in I.V/dl:

• (A) 20–55
•  (B) 24–60
•  (C) 30–65
• (D) 35–70

24. Continued intake of excessive amounts of vitamin A especially in children produces

• (A) Irritability
• (B) Anorexia
• (C) Headache
•  (D) All of these

25. Vitamin D2 is also said to be

•  (A) Activated ergosterol
• (B) Fergocalciferol
• (C) Viosterol
• (D) All of these

 26. The poor sources of vitamin D:

• (A) Eggs
• (B) Butter
• (C) Milk
• (D) Liver

 27. The activity of tocopherols is destroyed by

• (A) Oxidation
• (B) Reduction
• (C) Conjugation
• (D) All of these

 28 Some tocopherols are

•  (A) Terpenoid in structure
•  (B) Dional in structure
• (C) Isoprenoid in structure
• (D) Farnesyl in structure

29. The methyl groups in the aromatic nucleus of a tocopherols are

• (A) 2
• (B) 3
• (C) 4
• (D) 5

30. Vitamin E stored in

• (A) Mitochondria
• (B) Microsomes
• (C) Both (A) and (B)
• (D) None of these

31. Vitamin E protects the polyunsaturated fatty acids from oxidation by molecular oxygen in the formation of

• (A) Superoxide
• (B) Peroxide
• (C) Trioxide
• (D) All of these

32. The tocopherols prevent the oxidation of

• (A) Vitamin A
• (B) Vitamin D
• (C) Vitamin K
• (D) Vitamin C

33. Vitamin E protects enzymes from destruction in

• (A) Muscles
• (B) Nerves
• (C) Gonads
• (D) All of these

34. Vitamin K regulates the synthesis of blood clotting factors:

•  (A) VII
• (B) IX
•  (C) X
• (D) All of these

35. Ascorbic acid can reduce

•  (A) 2, 4-dinitro benzene
• (B) 2, 6-Dichlorophenol Indophenol
• (C) 2, 4-dibromobenzene
• (D) 2, 6-dibromo benzene
• 
  

36. Sterilized milk is devoid of

• (A) Vitamin A
• (B) Vitamin B1
• (C) Vitamin C
• (D) Vitamin D

37. The symptoms of scurvy are

•  (A) Poor healing of wounds
• (B) Loosening of teeth
• (C) Anaemia
• (D) All of these

38. Kwashiorkor results from

•  (A) Vitamin A deficiency
•  (B) Vitamin D deficiency
• (C) Deficiency of minerals in diet
• (D) Protein and caloric deficiency in diet

39. Which among the following fatty acids is an essential fatty acid for man?

• (A) Palmitic acid
• (B) Oleic acid
• (C) Linoleic acid
• (D) None of these

40. The number of nutritionally essential amino acids for man is

• (A) 6
• (B) 8
•  (C) 10
• (D) 12

41. Avidin is present in

• (A) Cow’s milk
• (B) Raw egg
• (C) Green leafy vegetables
• (D) Carrots

42. Marasmus is due to malnutrition of

• (A) Proteins
• (B) Proteins and calories
•  (C) Proteins and vitamins
• (D) Proteins and minerals

43. Energy value in kilocalorie per gram of fat in the body is

• (A) 1
• (B) 4
• (C) 9
• (D) 18

44. Which among the following is an essential amino acid for man?

•  (A) Alanine
• (B) Serine
• (C) Valine
• (D) Glutamic acid

45. Under what condition to basal metabolic rate goes up?

• (A) Cold environment
• (B) Hot environment
• (C) Intake of base forming foods
• (D) Hypothyroidism

46. What is the major form of caloric storage in human body?

•  (A) ATP
• (B) Glycogen
• (C) Creatine phosphate
• (D) triacylglycerol

47. The phosphoprotein of milk is

• (A) Lactalbumin
• (B) Lactoglobulin
• (C) Vitellin
• (D) Caein

48. Dictary deficiency of this vitamin leads to night blindness:

•  (A) Retinol
• (B) Niacin
• (C) Ascorbic acid
• (D) Cholecalciferol

Answer:

00. C 01. C 02. D 03. A 04. C 05. A 06. C 07. D 08. D 09. B 10. C 11. C 12. A 13. C 14. D 15. A 16. D 17. D 18. C 19. D 20. D 21. A 22. D 23. B 24. D 25. D 26. C 27. A 28. A 29. B 30. C 31. B 32. A 33. D 234. D 235. B 36. C 37. B 38. D 39. C 40. B 41. B 42. B 43. C 44. C 45. A 46. C 47. D 48. A