MCQOPTIONS
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MCQOPTIONS
This section includes 167 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Structural component of hemoglobin is |
| A. | manganese |
| B. | zinc |
| C. | iron |
| D. | chorine |
| Answer» D. chorine | |
| 52. |
For most enzymes the optimum temperature is |
| A. | 30-40 °C |
| B. | 40-50 °C |
| C. | 40-45 °C |
| D. | 45-50 °C |
| Answer» D. 45-50 °C | |
| 53. |
Through enzyme pepsin, proteins can be changed to |
| A. | polypeptides |
| B. | cellulose |
| C. | amino acids |
| D. | fatty acids |
| Answer» B. cellulose | |
| 54. |
While chewing, cooked starch (C₆H₁₀O₅)n is converted to maltose (C₁₂H₂₂O₁₁) through enzyme |
| A. | salivary mucin |
| B. | salivary amylase |
| C. | Chyme |
| D. | Chyle |
| Answer» C. Chyme | |
| 55. |
In plants, enzymes become denatured above |
| A. | 40 °C |
| B. | 50 °C |
| C. | 60 °C |
| D. | 70 °C |
| Answer» D. 70 °C | |
| 56. |
Using manganese oxide as a catalyst, in heating potassium chlorate (KClO₃), manganese oxide (MnₓOᵧ) |
| A. | evaporates |
| B. | melts |
| C. | remains unchanged |
| D. | becomes magnesium carbonate |
| Answer» D. becomes magnesium carbonate | |
| 57. |
In fish, the large molecules are normally made up of |
| A. | proteins and fats |
| B. | Proteins and carbohydrates |
| C. | Minerals and proteins |
| D. | Minerals and Fats |
| Answer» B. Proteins and carbohydrates | |
| 58. |
Many food substances taken in by animals are |
| A. | soluble in water |
| B. | insoluble in water |
| C. | digested without enzymes |
| D. | digested through fats |
| Answer» C. digested without enzymes | |
| 59. |
Organic catalysts called enzymes are mainly made up of |
| A. | carbohydrates |
| B. | fats |
| C. | potassium |
| D. | proteins |
| Answer» E. | |
| 60. |
While testing presence of sugar in urine, strip color changes due to amount of |
| A. | glucose oxidase |
| B. | peroxidase |
| C. | hydrogen per oxide |
| D. | hydrogen bicarbide |
| Answer» D. hydrogen bicarbide | |
| 61. |
Nature of most intestinal enzymes is |
| A. | acidic |
| B. | alkaline |
| C. | water based |
| D. | mineral based |
| Answer» C. water based | |
| 62. |
At a pH 7 to 9, the activity of amylase |
| A. | stops |
| B. | slows |
| C. | expedites |
| D. | ends |
| Answer» C. expedites | |
| 63. |
Nature of pepsin is slightly |
| A. | acidic |
| B. | alkaline |
| C. | water based |
| D. | mineral based |
| Answer» B. alkaline | |
| 64. |
Mammals do not produce |
| A. | salivary amylase |
| B. | catalase |
| C. | pancreatic amylase |
| D. | Cellulose |
| Answer» E. | |
| 65. |
Functions of stomach involves |
| A. | action of bile |
| B. | digestion of proteins |
| C. | action of pancreatic enzymes |
| D. | absorption of digested foods |
| Answer» C. action of pancreatic enzymes | |
| 66. |
In which category of resources, metal lies |
| A. | renewable resource |
| B. | non-renewable resource |
| C. | artificial resource |
| D. | element |
| Answer» C. artificial resource | |
| 67. |
Blood vessels attached to the lower surface of the liver are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 68. |
Upper surface of the organ touches the diaphragm. The organ is |
| A. | liver |
| B. | stomach |
| C. | duodenum |
| D. | pyloric sphincter |
| Answer» B. stomach | |
| 69. |
Peptidase is also known as |
| A. | protease |
| B. | erepsin |
| C. | pancreatic amylase |
| D. | pancreatic lipase |
| Answer» C. pancreatic amylase | |
| 70. |
The enzyme steapsin is found in |
| A. | salivary amylase |
| B. | pancreatic amylase |
| C. | pancreatic juice |
| D. | protoplasm |
| Answer» D. protoplasm | |
| 71. |
Enzyme action depends upon |
| A. | active site |
| B. | available site |
| C. | recognizable site |
| D. | detachable site |
| Answer» B. available site | |
| 72. |
Extreme changes in acidity or alkalinity of solutions |
| A. | produce more hydrogen per oxide |
| B. | needed more enzymes |
| C. | cause enzymes to become denatured |
| D. | cause foods get digested earlier |
| Answer» D. cause foods get digested earlier | |
| 73. |
Central heating systems can be run through |
| A. | more deforestation |
| B. | burning of garbage |
| C. | lesser incinerators |
| D. | cooling water pipelines |
| Answer» C. lesser incinerators | |
| 74. |
Problem of solid waste disposal can be reduced through |
| A. | recycling |
| B. | lesser pollution |
| C. | more timber |
| D. | population control |
| Answer» B. lesser pollution | |
| 75. |
Salivary and pancreatic amylase help digest |
| A. | proteins |
| B. | starch |
| C. | fats |
| D. | minerals |
| Answer» C. fats | |
| 76. |
Pepsin helps digest proteins to |
| A. | soluble proteins |
| B. | amino acids |
| C. | peptones |
| D. | Chyme |
| Answer» D. Chyme | |
| 77. |
Bile obtained after breakage of hemoglobin is of |
| A. | red color |
| B. | bright pink color |
| C. | blue color |
| D. | greenish-yellow color |
| Answer» E. | |
| 78. |
Largest gland in body is |
| A. | stomach |
| B. | large intestine |
| C. | liver |
| D. | pituitary gland |
| Answer» D. pituitary gland | |
| 79. |
Through enzyme maltase, maltose (C₁₂H₂₂O₁₁) can be converted into |
| A. | starch |
| B. | sucrose |
| C. | glucose |
| D. | galactose |
| Answer» D. galactose | |
| 80. |
PH value of below 7 indicates pure |
| A. | water |
| B. | enzyme |
| C. | alkaline |
| D. | acidic |
| Answer» E. | |
| 81. |
Inhibitors blocking active site by making covalent bonds are specifically known as |
| A. | reversible inhibitors |
| B. | irreversible inhibitor |
| C. | competitive inhibitors |
| D. | non-competitive inhibitors |
| Answer» C. competitive inhibitors | |
| 82. |
Argument about enzyme, that they induces change in its structure when a substrate combines with enzyme was highlighted in |
| A. | Lock and Key model |
| B. | Induce Fit model |
| C. | Conceptual model |
| D. | Both a and b |
| Answer» C. Conceptual model | |
| 83. |
Optimum Ph for Chymotrypsin is |
| A. | 8 |
| B. | 7 |
| C. | 7--8 |
| D. | 7--9 |
| Answer» D. 7--9 | |
| 84. |
Enzymes which are helpful in cellular respiration is found in |
| A. | Golgi complex |
| B. | chloroplast |
| C. | mitochondria |
| D. | RNA |
| Answer» D. RNA | |
| 85. |
If concentration of an enzyme is increased by two fold, rate of reaction would be |
| A. | half |
| B. | double |
| C. | triple |
| D. | ceased |
| Answer» C. triple | |
| 86. |
For enzyme activity in human body, optimum temperature is |
| A. | 37c |
| B. | 34c |
| C. | 33c |
| D. | 32c |
| Answer» B. 34c | |
| 87. |
Mechanism of enzyme activity is termed as |
| A. | hydrolysis |
| B. | catalysis |
| C. | proteolysis |
| D. | hydration |
| Answer» C. proteolysis | |
| 88. |
If co-factor is loosely attached to protein part, it is termed as |
| A. | substrate |
| B. | prosthetic group |
| C. | catalyst |
| D. | co-enzyme |
| Answer» E. | |
| 89. |
If vibration become too violent on increasing heat above limit, enzyme activity will be lost and enzyme is said to be |
| A. | catalyzed |
| B. | broken |
| C. | denatured |
| D. | failed |
| Answer» D. failed | |
| 90. |
Lock and Key model was developed for visualization of substrate and enzyme concentration was proposed by |
| A. | Emil Fischer |
| B. | F. Sanger |
| C. | Erwin Chargaff |
| D. | Edward |
| Answer» B. F. Sanger | |
| 91. |
Extracellular digestion is not witnessed in |
| A. | saprophytic bacteria |
| B. | virus |
| C. | parasitic bacteria |
| D. | fungi |
| Answer» C. parasitic bacteria | |
| 92. |
Digestive systems do not exist in |
| A. | animals |
| B. | plants |
| C. | mammals |
| D. | insects |
| Answer» C. mammals | |
| 93. |
Food oxidation during cellular respiration is carried out through |
| A. | Lipases |
| B. | Cellulose |
| C. | oxidation-reduction enzymes |
| D. | the production of hydrogen bioxide |
| Answer» D. the production of hydrogen bioxide | |
| 94. |
Catalase enzyme is common in |
| A. | plants only |
| B. | animals only |
| C. | insects |
| D. | plant and animals |
| Answer» E. | |
| 95. |
When potassium chlorate (KClO₃) is heated, the products include |
| A. | potassium chloroform and water |
| B. | Potassium chloride and water |
| C. | potassium chloride and enzymes |
| D. | Potassium carbonate and oxygen |
| Answer» C. potassium chloride and enzymes | |
| 96. |
To expedite heating potassium chlorate (KClO₃) to get oxygen (O₂) and potassium chloride (KCl), the suitable catalyst maybe |
| A. | silver |
| B. | chlorine |
| C. | manganese oxide |
| D. | citric acid |
| Answer» D. citric acid | |
| 97. |
Digestion does not involve |
| A. | breaking of particles in starch |
| B. | simpler substances |
| C. | water soluble substances |
| D. | substances diffusible through cell membranes |
| Answer» B. simpler substances | |
| 98. |
Pepsin is a type of |
| A. | salivary amylase |
| B. | pancreatic amylase |
| C. | Cellulose |
| D. | proteases |
| Answer» E. | |
| 99. |
Pepsin helps in the digestion of |
| A. | peptic acid |
| B. | proteins |
| C. | water soluble substances |
| D. | fats |
| Answer» C. water soluble substances | |
| 100. |
Digestive processes of plants and animals |
| A. | can not be matched |
| B. | are very similar |
| C. | greatly vary |
| D. | are alike due to similar digestive systems |
| Answer» C. greatly vary | |