12th class (Fsc) Chemistry unit 14 MCQs
51. Oils are converted into fats by:
a. Hydration
b. Decarboxylation
c. Hydrohalogenation
d. None of these
52. Fat is a:
a. Protein
b. Ether
c. Lipid
d. Amino acid
53. To which class of compounds cholesterol belong?
a. Lipids
b. Carbohydrates
c. Vitamins
d. Fats
54. Which of the following phospholipid?
a. Oil
b. Cholesterol
c. Vitamin D
d. Lecithin
55. The molecular formula of a trisaccharide will be:
a. C18H36O18
b. C3H3 O3
c. C18H32O16
d. C3H6O3
56. Lipids are classified into:
a. 4 classes
b. 2 classes
c. 5 classes
d. 3 classes
57. Which of the following substance is not belong to lipids?
a. Glycogen
b. Cholesterol
c. Vitamin-D
d. Oil
58. To which class of organic compound soap belong?
a. Acid amide
b. Ether
c. Salt of an organic acid
d. Amide
59. The extent of unsaturation in a fat or oil is expressed in terms of:
a. Acid amide
b. Iodine number
c. Acid number
d. None of these
60. The name of lipid id derived from Greek word lipos, which means:
a. Fatty acid
b. Fat
c. Oil
d. None of these
61. …… is a type of compound lipid:
a. Sterols
b. Sphingolipid
c.
d. All of these
62. Which one of the following is the precursor of steroids.
a. Ergocaloferol
b. Ergosterol
c. None of these
d. Cholestrol
63. The increased quantities of cholesterol in blood cause:
a. Heart disease
b. Plaque
c. Blood pressure
d. All of these
64. when nitrogenous base combine with a sugar it is called:
a. Necleoside
b. Ribose
c. None of these
d. Nucleotide
65. Which of these enzymes is an acidic pH active enzymes:
a. Pepsin
b. Lipase
c. Trypsin
d. Amylase
66. Fats are hydrolyzed by the enzyme:
a. Zymase
b. Urease
c. Lipase
d. Maltase
67. Which one of the following is act as enzyme:
a. Cellulase
b. Urease
c. Sucrose
d. All of these
68. IUB stands for:
a. Indian Union of Biochemistry
b.International Union of Biochemistry
c. International Union of Biology
d. None of above
69. The protein component of enzymes is called:
a. Co-enzyme
b. Apo-enzyme
c. Co-factor
d. None of these
70. The enzymatic reaction occurs best at or aroun:
a. 17oC
b. 37oC
c. 47oC
d. 27oC
71. The optimum pH of salivary amylase is:
a. 6.4-6.9
b. 2.4-2.9
c. 4.6-9.6
d. 3.4-4.9
72. Enzymes speed up reactions in factor of upto.
a. 1015
b. 100
c. 1030
d. 1020
73. In which of these processes are small organic molecules made into macromolecules:
a. The polymerization of ethane
b. The cracking of petroleum fraction
c. The hydrolysis of proteins
d. The fractional distillation of crude oil
74. Which of these polymers is an addition polymer?
a. Terylene
b. Nylon-6,6
c. Epoxy resin
d. Polystyrene
75. Which of these polymers is a synthetic polymer?
a. Cellulose
b. Animal fat
c. Polyester
d. Starch