MCQOPTIONS
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MCQOPTIONS
This section includes 138 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Protection against sudden thermal change is carried out by help of |
| A. | water |
| B. | salt |
| C. | ions |
| D. | bonds |
| Answer» B. salt | |
| 52. |
Enzymes, antibodies, hormones and hemoglobin are examples of |
| A. | Fibrous proteins |
| B. | glandular proteins |
| C. | globular proteins |
| D. | Enzymatic proteins |
| Answer» D. Enzymatic proteins | |
| 53. |
Potential source of chemical energy at cellular level comes from bond between |
| A. | carbon-oxygen |
| B. | carbon-hydrogen |
| C. | oxygen-hydrogen |
| D. | carbon-carbon |
| Answer» C. oxygen-hydrogen | |
| 54. |
Lipids have more (C-H) bonds and less oxygen, this unique quality allow lipids to perform a key role by |
| A. | yielding water |
| B. | giving oxygen |
| C. | storing energy |
| D. | providing support |
| Answer» D. providing support | |
| 55. |
Ring shaped structures are usually seen in glucose and |
| A. | trioses |
| B. | ribose |
| C. | tetroses |
| D. | fructose |
| Answer» C. tetroses | |
| 56. |
When carbohydrates combine with proteins, outcome product is called |
| A. | glycoside |
| B. | glucosteroid |
| C. | glycoprotein |
| D. | glycolipid |
| Answer» D. glycolipid | |
| 57. |
Two chains of amino acids in an insulin molecule are held together by |
| A. | sulphide bridges |
| B. | disulphide bridges |
| C. | peptide bond |
| D. | covalent linkage |
| Answer» C. peptide bond | |
| 58. |
If one amino acid in each beta chain of hemoglobin, out of 574 amino acids do not occupy normal place it can lead to |
| A. | paralysis |
| B. | death |
| C. | cramp |
| D. | fits |
| Answer» C. cramp | |
| 59. |
Seldom fatal disease is known as |
| A. | malignant |
| B. | benign |
| C. | tertian malaria |
| D. | anemia |
| Answer» C. tertian malaria | |
| 60. |
Most abundant carbohydrate which is found in nature is |
| A. | fructose |
| B. | glycogen |
| C. | cellulose |
| D. | pectin |
| Answer» D. pectin | |
| 61. |
Most complicated food molecules are |
| A. | proteins |
| B. | fats |
| C. | carbohydrates |
| D. | glucose |
| Answer» B. fats | |
| 62. |
Fatty acids which are straight chained are found in |
| A. | animals |
| B. | plants |
| C. | micro-organisms |
| D. | unicellular plants |
| Answer» B. plants | |
| 63. |
RNA is synthesized from DNA by process of |
| A. | translation |
| B. | transcription |
| C. | transgenic |
| D. | duplication |
| Answer» C. transgenic | |
| 64. |
There are two types of a starch which are amylose and |
| A. | pectin |
| B. | amylopectin |
| C. | agar |
| D. | dextrin |
| Answer» C. agar | |
| 65. |
Nucleotide in DNA are united with one another by a linkage called |
| A. | ester linkage |
| B. | diester linkage |
| C. | phosphodiester linkage |
| D. | peptide linkage |
| Answer» D. peptide linkage | |
| 66. |
Water has an excellent ability to absorb heat without changing its own |
| A. | polarity |
| B. | shape |
| C. | temperature |
| D. | mass |
| Answer» D. mass | |
| 67. |
Greater number of carbon atoms in chain results in higher |
| A. | melting point |
| B. | boiling point |
| C. | freezing point |
| D. | stability |
| Answer» B. boiling point | |
| 68. |
Sakcharon is a Greek word for saccharine, which means |
| A. | starch |
| B. | sugar |
| C. | protein |
| D. | salt |
| Answer» C. protein | |
| 69. |
Tertiary conformation of proteins is maintained by 3 types of bonds namely ionic, hydrogen and |
| A. | sulphide |
| B. | disulphide |
| C. | covalent |
| D. | peptide |
| Answer» C. covalent | |
| 70. |
RNA is found in nucleolus of cell and DNA is found in |
| A. | chromosomes |
| B. | cytosol |
| C. | cell wall |
| D. | vacuole |
| Answer» B. cytosol | |
| 71. |
Lipids are insoluble in water but it is easily soluble in |
| A. | inorganic solvent |
| B. | water |
| C. | organic solvent |
| D. | acids |
| Answer» D. acids | |
| 72. |
A molecular structure of a sugar which contains 6 carbon is known as |
| A. | fructose |
| B. | sucrose |
| C. | glucose |
| D. | lactose |
| Answer» D. lactose | |
| 73. |
Structure in which a ribose sugar will form five cornered ring is called |
| A. | Ribofuranose |
| B. | Glucopyramose |
| C. | fructose |
| D. | glucose |
| Answer» B. Glucopyramose | |
| 74. |
Proteins are formed when carbon combines with nitrogen in amino acid linkages with help of |
| A. | covalent bond |
| B. | ionic bond |
| C. | peptide bond |
| D. | glycoside linkage |
| Answer» D. glycoside linkage | |
| 75. |
Cellulose is highly insoluble in water and is not digested in digestive tract of |
| A. | human |
| B. | birds |
| C. | protozoa's |
| D. | insects |
| Answer» B. birds | |
| 76. |
Grapes, figs and dates are rich in |
| A. | fructose |
| B. | starch |
| C. | glucose |
| D. | proteins |
| Answer» D. proteins | |
| 77. |
When starches are mixed with iodine, they give a color which is |
| A. | violet |
| B. | blue |
| C. | green |
| D. | purple |
| Answer» C. green | |
| 78. |
Breaking down of large molecules like proteins, starch and fats is known as |
| A. | mechanical digestion |
| B. | chemical digestion |
| C. | physical digestion |
| D. | none of others |
| Answer» C. physical digestion | |
| 79. |
In a chemical reaction, when alcohol and acid react together releasing a water molecule, compound is formed, named as |
| A. | ether |
| B. | ester |
| C. | enzyme |
| D. | glycerol |
| Answer» C. enzyme | |
| 80. |
Hexose is also known as |
| A. | ribose sugar |
| B. | aldo sugar |
| C. | table sugar |
| D. | cane sugar |
| Answer» C. table sugar | |
| 81. |
Hair cover is no longer an efficient insulator in |
| A. | strong winds |
| B. | water |
| C. | arctic pole |
| D. | Alaska |
| Answer» C. arctic pole | |
| 82. |
Structural carbon is a |
| A. | monovalent |
| B. | bivalent |
| C. | tetravalent |
| D. | trivalent |
| Answer» D. trivalent | |
| 83. |
Cellulose gives no color when it comes in contact with |
| A. | carbon dioxide |
| B. | water |
| C. | iodine |
| D. | chloroform |
| Answer» D. chloroform | |
| 84. |
Most complex also most abundant carbohydrates that are found in nature are |
| A. | monosaccharide |
| B. | disaccharides |
| C. | polysaccharides |
| D. | Oligosaccharides |
| Answer» D. Oligosaccharides | |
| 85. |
A valuable and most important quality of proteins is to prevent blood loss after an injury by process of |
| A. | (coagulation)blood clotting |
| B. | cell division |
| C. | imputation |
| D. | glycolysis |
| Answer» B. cell division | |
| 86. |
A bacterial cell contains 70% of |
| A. | proteins |
| B. | water |
| C. | lipids |
| D. | DNA |
| Answer» C. lipids | |
| 87. |
Process of condensing many small molecules to form one large molecule is called |
| A. | polymerization |
| B. | condensation |
| C. | hydrolysis |
| D. | oxidation |
| Answer» B. condensation | |
| 88. |
Alpha carbon is attached with an amino group on one side and other side is attached to a |
| A. | carboxyl group |
| B. | ester group |
| C. | alcohol |
| D. | acetic group |
| Answer» B. ester group | |
| 89. |
Two strands of DNA is a double helix structure, coiled with each other as |
| A. | parallel |
| B. | ant parallel |
| C. | opposite |
| D. | connected |
| Answer» C. opposite | |
| 90. |
A compound which is responsible for structure of membranes of cell and its organelles is a |
| A. | lipid |
| B. | proteins |
| C. | fats, glucose, starch |
| D. | waxes |
| Answer» B. proteins | |
| 91. |
Palmitic acid has a melting point of |
| A. | 64.1 c |
| B. | 63.1 c |
| C. | 6.31 c |
| D. | 61.3 c |
| Answer» C. 6.31 c | |
| 92. |
In hydrolysis, the larger molecules are broken down into smaller molecules by the addition of |
| A. | amino acids |
| B. | water |
| C. | grape sugar |
| D. | sucrose |
| Answer» C. grape sugar | |
| 93. |
Molecules which have one or more polypeptide chains in form of fibrils are called |
| A. | Fibrous proteins |
| B. | globular proteins |
| C. | Glandular Tissue |
| D. | complex proteins |
| Answer» B. globular proteins | |
| 94. |
Pyrimidines are composed of cytosine, thiamine and |
| A. | guanine |
| B. | adenine |
| C. | uracil |
| D. | all of the above |
| Answer» D. all of the above | |
| 95. |
Ozone depletion can be prevented with |
| A. | use of scrubbers in factory chimneys |
| B. | acidic waste is treated with alkalis |
| C. | fossil fuels are used in factories |
| D. | lower consumption of chlorofluorocarbons-based products |
| Answer» E. | |
| 96. |
Which one is true about cuticlar transpiration |
| A. | is the same as the stomatal transpiration |
| B. | helps plant get rid of excess water |
| C. | is more common in plants |
| D. | looses lesser water as cuticle is relatively impermeable to water |
| Answer» E. | |
| 97. |
Main sources of carbohydrates are |
| A. | milk |
| B. | water |
| C. | green plants |
| D. | proteins |
| Answer» D. proteins | |
| 98. |
Single-ringed pyrimidines and double-ringed pyrimidines are types of |
| A. | aqueous bases |
| B. | strong bases |
| C. | weak bases |
| D. | nitrogenous bases |
| Answer» E. | |
| 99. |
Main source of carbohydrates for various animals is |
| A. | starch |
| B. | glycogen |
| C. | agar |
| D. | pectin |
| Answer» B. glycogen | |
| 100. |
Function of tRNA and mRNA is to decode information from genes into a specific |
| A. | lipid |
| B. | proteins |
| C. | sugar |
| D. | carbohydrates |
| Answer» E. | |