BIO MOLECULES – 2

1) Proteins are denatured in the
a) Mouth
b) Stomach
c) large intestine.
d) Small intestine

2) Which one of the following is a final waste product of protein metabolism in human beings ?
a)
b) Uric acid
c) Urea
d) Ammonia.

3) All digestive enzymes are
a) Lipases
b) Oxidases
c) Transferases
d) Hydrolases

4) The chemical substances which act as emulsifiers in lipid metabolism are
a) Phosphoric acid
b) Fatty acids
c) Sulphuric acid
d) Bile acids.

5) The enzymes called lipases convert
a) Cellulose into glucose
b) Glucose into glycogen
c)
d) Fats into a mixture of glycerol and fatty acids.

6) Excess glucose is stored in the liver as
a) Amylopectin
b) Amylose
c) Cellulose
d) Glycogen.

7) The conversion of glucose into glycogen in the liver is called
a) Glycogenolysis
b) Glycogenesis
c) Glycolysis
d) Gluconeogenesis

8) Hypoglycemia refers to
a) High blood sugar level
b) High blood pressure
c) High salt concentration in blood
d) Low sugar level in blood

9) In the majority of the cells, the principal biomolecules undergoing oxidation during respiration are
a) Vitamins
b) Fats
c) Proteins
d) Carbohydrates

10) The process of respiration in the absence of oxygen is said to be
a) Metabolic
b) Glycolysis
c) Anaerobic
d) Aerobic

11) Anaerobic respiration of glucose produces
a)
b)
c)
d)

12) During aerobic respiration (cellular respiration) one molecule of glucose produces
a) 2 ATP molecules
b) 10 ATP molecules
c) 36 ATP molecules
d) 38 ATP molecules.

13) Mark the incorrect statement about glycolysis
a) It is anaerobic respiration
b) During glycolysis glucose is converted into succinate
c) Glycolysis provides energy to those cells which live without oxygen
d) It occurs in the cytoplasm of the cell.

14) The important tertiary structures of proteins are
a)
b) Globular
c) Fibrous
d) Both (b) and (c)

15) The principal buffer present in the blood is
a)
b)
c)
d)

16) Iron present in haemoglobin is in
a) the ferrous state
b) the ferric state
c) the ferrous partly, and partly in the ferric state
d) the elemental state.

17) The protein which transports oxygen in the blood stream is
a) Insulin
b) Haemoglobin
c) Albumin
d) Collagen.

18) The protein responsible for blood clotting is :
a) Fibroin
b) Globulins
c) Albumins
d) Fibrinogen

19) The number of polypeptide chains present in a molecule of haemoglobin is
a) Four
b) One
c) Two
d) Three

20) The Y shaped protein molecules involved in the immune system are called
a) Antigens
b) Immunoglobulins
c) Pathogens
d) Vitamins

21) White blood cells (WBC)
a) act as a source of energy
b) transport oxygen from the lungs to the tissues
c) help in blood clotting
d) provide defence against infections

22) Antibodies are produced by
a) WBC
b) RBC
c) blood platelets
d) none of the above

23) Mark the correct statement about antibodies:
a) provide defence against infections
b) are Y-shaped protein molecules
c)
d) all the three above.

24) Most viruses are composed of
a) proteins
b) proteins and nucleic acids
c) cellulose and fat
d) fats and proteins

25) Which of the following viruses contain RNA ?
a) Polio virus
b) Tobacco mosaic virus
c) Herpes virus
d) Both (a) and (b)

26) Which of the following is a vitamin ?
a) Glucose
b) Keratin
c) Maltose
d) Riboflavin.

27) Vitamin B6 is known as .
a) Pyridoxine
b) Thiamine
c) Tocopherol
d) Riboflavin.

28) The best source of vitamin A is
a) Oranges
b) Beans
c) Carrots
d) Wheat.

29) Riboflavin is the chemical name of
a)
b)
c)
d) Vitamin B complex.

30) The disease beriberi is caused by the deficiency of vitamin
a) A
b)
c) C
d) D

31) The disease scurvy is caused by deficiency of vitamin
a) A
b) B
c) C
d) D

32) Vitamin E is also called
a) Cyanocobalamin
b) Tocopherol
c) Ascorbic acid.
d) Lactoflavin

33) Which of the following vitamins is not soluble in water ?
a) C
b)
c)
d) D

34) The best source of vitamin C is
a) Code liver oil
b) Egg yolk
c) Citrus fruits
d) Fish liver oil.

35) The deficiency of vitamin K causes
a) Haemorrhage
b) Lengthening the time of blood clotting
c) Inflammation of lung
d) Both (a) and (b).

36) Milk contains vitamins
a) A, D and E
b)
c) C, D and K
d)

37) Thiamine is a
a) Pyrimidine
b) Purine
c) Carbohydrate
d)

38) Nervousness and anaemia is caused by the deficiency of vitamin
a)
b)
c)
d)

39) Deficiency of vitamin E causes
a) Scurvy
b) Loss of appetite
c) Loss of sexual power and reproduction
d) beriberi.

40) Which of the following if taken excessively can accumulate in the body and cause toxicity ?
a) Vitamin C
b) Vitamin D
c)
d) None of these.

41) Which of the following is a fat soluble vitamin ?
a) Vitamin A
b) Pyridoxine
c) Riboflavin
d) Thiamine.

42) The prolonged deficiency of nicotinic acid (niacin) in the human diet leads to
a) Beri-beri
b) Pellagra
c) Scurvy
d) Anaemia

43) The chemical messengers produced in the ductless glands are
a) Vitamins
b) Lipids
c) Hormones
d) Antibodies.

44) The first hormone to be isolated and also the first to be synthesized in the laboratory was
a) Insulin
b) Testosterone
c) Cortisone
d) Adrenaline.

45) Which of the following hormones contains iodine?
a) Insulin
b) Thyroxine
c) Adrenaline
d) Testosterone.

46) Which of the following is a male sex hormone ?
a) Progesterone
b) Estrone
c) Epinephrine
d) Testosterone.

47) The hormone which controls the uterine cycle in women is
a) Estrone
b) Androsterone
c) Progesterone
d) Testosterone.

48) The sex hormone which controls the development and maintenance of pregnancy is
a) Cortisone
b) Thyroxine
c) Progesterone
d) Estrone.

49) The hormone which controls the contraction of the uterus after child birth and produces lactation in the mammary glands is
a) Insulin
b) Oxytocin
c) Estrone
d) Estradiol.

50) The hormones used by athletes to increase the mass and strength of muscles is/are
a) Estrogens
b) Gestogens
c) Androgens
d) Both estrogens and androgens

51) Insulin is a
a) Steroid hormone
b) Peptide hormone
c) Amine hormone
d) None of the above.

52) An example of a water soluble vitamin is
a) Vitamin A
b) Vitamin C
c) Vitamin D
d) Vitamin E

53) Which of the following is a proteolytic enzyme ?
a) Insulin
b) Diastase
c) Pepsin
d) Adenine

54) Deficiency of vitamin E causes
a) Sterility
b) Rickets
c) Scurvy
d) Beri-beri

55) The vitamin which is water soluble and an antioxidant is
a) Vitamin E
b) Vitamin D
c) Vitamin C
d)

56) Which of the following enzymes hydrolyse triglycerides to fatty acids and glycerol ?
a) Amylase
b) Maltase
c) Lipase
d) Pepsin

57) Which of the following is a molecular disease ?
a) Allergy
b) Cancer
c) German measles
d) Sickle cell anemia

58) The enzyme trypsin converts
a) Proteins into amino acids
b) Starches into sugar
c) Glucose into glycogen
d)

59) Calorific value is in the order
a) Fats > Carbohydrates > Proteins
b) Carbohydrates > Fats > Proteins
c) Proteins > Carbohydrates >Fats
d) Fats > Proteins >Carbohydrates.

60) The digestion of fats in the intestines is aided by
a) Diffusion
b) Protection
c) Peptization
d) Emulsification

61) Ascorbic acid is the chemical name of
a)
b) Vitamin A
c) Vitamin C
d) Vitamin D.

62) Identify the vitamin whose deficiency in our food decreases reproductive power
a) Vitamin E
b) Vitamin D
c) Vitamin A
d) Vitamin C

63) The function of haemoglobin is to :
a) help in muscular moment
b) store oxygen until it is needed for energy reproduction
c) transport oxygen from the lungs to various tissues through the blood stream
d) catalyse biochemical processes

64) The chemical name of vitamin B1 is
a) Ascorbic acid
b) Riboflavin
c) Pyridoxine
d) Thiamine

65) The energy stored in the cells of a living body is in the form of
a) Fats
b) Glucose
c) ATP
d) Proteins

66) Adenosine is an example of a
a) Nucleotide
b) Nucleoside
c) Purine base
d) Pyridine base

67) A metal which can form a complex with insulin is
a) Copper
b) Iron
c) Zinc
d) Cobalt

68) Which of the following is a fat soluble vitamin ?
a) Vitamin A
b) Riboflavin
c) Pyridoxine
d) Thiamine.

69) Chemically digestion is basically
a) Anabolism
b) Hydrogenation
c) Hydrolysis
d) Dehydrogenation.

70) The reaction H2O + C12H22O11 4CO2 + 4C2H5OH is an example of Â
a) Fermentation
b) Saponification
c) Esterification
d) Polymerization.

71) Hyperglycemia implies a
a) High blood-sugar level
b) Low blood-sugar level
c) Low concentration of salt is blood.
d) High concentration of salt in blood

72) The pH of blood is around
a) 8.0
b) 6.0
c) 5.4
d) 7.4

73) Oxytocin is
a) an antibody
b) a hormone
c) an enzyme
d) none of these

74) The substances which act as emulsifiers in lipid metabolism are
a) Bile acids
b) Fatty acids
c) Amino acids
d) Sulphonic acids

75) The oxidation of glucose is one of the most important reactions in a living cell. What is the

number of ATP molecules generated in cells from one molecule of glucose ?
a) 38
b) 28
c) 12
d) 18

76) The pH of the blood does not appreciably change by a small addition of an acid or a base because Â
a) Serum protein acts as buffer
b) blood contains iron as a part of the molecule
c) blood can be easily coagulated
d) It is a body fluid

77) The process of synthesis and degradation of biomolecules in cells is called

a) Metabolism
b) Anabolism
c) Catabolism
d) Catenation

78) Which of the following biomolecules contains a non-transition metal ion ?
a) Haemoglobin
b) Chlorophyll
c) Insulin
d)

79) The metal present in vitamin B12 is
a) Iron
b) Manganese
c) Cobalt
d) Magnesium

80) The hormone which helps in the conversion of glucose into glycogen is
a) Insulin
b) Glucogen
c) Adrenaline
d) None of these

81) The reaction of O2 and CO with haemoglobin gives
a) only oxygen-haem complex
b) only CO-haem complex
c) both but oxygen-haem complex is more stable
d) both but CO-haem complex is more stable.

82) The deficiency of which of the following vitamins adversely affects the eye sight?

a) A
b) D
c)
d) E

83) Which of the following hormones regulates sugar metabolism in the body ? Â
a) Adrenaline
b) Insulin
c) Thyroxine
d) Estrone

84) The metal present in the red blood cells is
a) Al
b) Hg
c) Cu
d) Fe

85) Which of the following elements is responsible for oxidation of water to O2 in biological processes ? Â
a) Fe
b) Mn
c) Cu
d) Mo

86) The deficiency of vitamin D causes
a) loss of appetite
b) Night blindness
c) Rickets
d) Xerosis

87) Match items in List I with those in List II from the combinations shown :

List 1  List 2
I. Pepsin A. Genetic material
II. Nucleic acid    B. Digestive enzyme
III. Ascorbic acid C. Antibiotic
IV. Testosterone D. Sex hormone
E. Vitamin

a) I—B ; II—A ; III—C ; IV—E
b) I—B ; II—A ; III—E ; IV—D
c) I—A ; II—B ; III—E ; IV—C
d) I—C; II—B ; III— A ; IV—D

88) The number of molecules of ATP produced during the lipid metabolism of a molecule of palmitic acid is
a) 86
b) 130
c) 56
d) 36

89) Vitamin A is called
a) Ascorbic acid
b) Retinol
c) Calciferol
d) Tocopherol.

90) Match List I with List II and select the correct answer using the codes given below the lists :

List 1  List 11
I. Anti-beriberi factor A. Vitamin C
II. Pancreas B. Glycerides
III. Palm oil C. Vitamin B1
IV. L(+)-Ascorbic acid D. Insulin

a) I—C, II—D, III—B, IV—A
b) I—C, II—D, III—A, IV—B
c) I—A, II—B, III—D, IV—C
d) | – A, II—B, III—C, IV—D

91) Galactose is converted into glucose in the
a) Mouth
b) Stomach
c) Liver
d) Anintestine

92) Night blindness is caused by the deficiency of
a)
b) Vitamin A
c) Vitamin C
d) Vitamin E

93) When amylases catalyse the hydrolysis of starch, the final product obtained is chiefly

a) Cellobiose
b) Glucose
c) Maltose
d) Sucrose

94) Which of the following diseases is caused by a virus?
a) Small pox
b) Typhoid
c) Sleeping sickness
d) Diphtheria

95) A man would die in an atmosphere of carbon monoxide because
a) It increases the blood pressure
b) it combines with oxygen present in the body to form carbon dioxide
c) It combines with the haemoglobin of the blood making it incapable of absorbing oxygen
d) It reduces the organic matter

96) Which of the following enzymes is not useful in the digestion of proteins ?

a) Chymotripsin
b) Pepsin
c) Trypsin
d) Lipase

97) In the conversion of sucrose to glucose, the enzyme acting is
a) Zymase
b) Lipase
c) Invertase
d) Invertase

98) Allergy is caused by the production of …… in the body
a) Hormones
b) Histamines
c) Vitamins
d) Diastase

99) Which of the following statements about vitamin is incorrect ?
a) It has a cobalt atom
b) It occurs in plants
c) It occurs in animals
d) It is needed by the human body in very small amounts.

100) Vitamin C is chemically
a) Ascorbic acid
b) Citric acid
c) Aspirin
d) Aspartic acid


Answer :

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