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.
| 101. |
Fatty acids which remain in liquid state at room temperature are said to be |
| A. | wax |
| B. | oil |
| C. | fats, glucose, starch |
| D. | lipids |
| Answer» C. fats, glucose, starch | |
| 102. |
A scientist who first determined sequence of amino acids in a protein molecule was |
| A. | F.Sanger |
| B. | Edward Jenner |
| C. | Erwin Chargaff |
| D. | F. Miescher |
| Answer» B. Edward Jenner | |
| 103. |
Most commonly found sugars are pentoses and |
| A. | hexoses |
| B. | tetroses |
| C. | triodes |
| D. | heptoses |
| Answer» B. tetroses | |
| 104. |
All enzymes control metabolism of cell because they are |
| A. | carbohydrates |
| B. | acids |
| C. | proteins |
| D. | fats |
| Answer» D. fats | |
| 105. |
Chemical composition of an acylglycerols is esters of fatty acids and |
| A. | bases |
| B. | alcohol |
| C. | water |
| D. | acids |
| Answer» C. water | |
| 106. |
Most of glycogens upon mixing with iodine gives a color which is |
| A. | blue |
| B. | red |
| C. | green |
| D. | pink |
| Answer» C. green | |
| 107. |
Microorganisms secrete an enzyme which helps in digestion of cellulose known as |
| A. | cellulase |
| B. | catalase |
| C. | sucrase |
| D. | pepsin |
| Answer» B. catalase | |
| 108. |
Water molecule (H₂O) is split into hydrogen (H₂) and oxygen (O₂) when |
| A. | larynx is lowered, glottis is open |
| B. | larynx is lowered and the windpipe is opened |
| C. | larynx is raised and epiglottis blocks glottis |
| D. | larynx is raised and pharynx is shut |
| Answer» D. larynx is raised and pharynx is shut | |
| 109. |
Fats are solid due to presence of |
| A. | Saturated fatty acids |
| B. | unsaturated fatty acid |
| C. | glycerols |
| D. | ester bond |
| Answer» B. unsaturated fatty acid | |
| 110. |
As compared to constituent glucose molecules (C₆H₁₂O₆), glycogen (C₆H₁₀O₅)n occupies |
| A. | more space |
| B. | less space |
| C. | become concave |
| D. | becomes convex |
| Answer» C. become concave | |
| 111. |
In context to nutrition in plants, Coal is a |
| A. | follicle fuel |
| B. | kinetic fuel |
| C. | fossil fuel |
| D. | holozoic fuel |
| Answer» D. holozoic fuel | |
| 112. |
Maurice Wilkins and Rosalind Franklin determine structure of DNA using technique called |
| A. | X-ray Diffraction |
| B. | X-ray Refraction |
| C. | X-ray Reflection |
| D. | Y-ray Refraction |
| Answer» B. X-ray Refraction | |
| 113. |
Percentage of water in an average brain cell is |
| A. | 75% |
| B. | 85% |
| C. | 95% |
| D. | 80% |
| Answer» C. 95% | |
| 114. |
Starches which have unbranched chains and are only soluble in hot water are |
| A. | Amylose starches |
| B. | amylopectin starches |
| C. | glucose starch |
| D. | pectin starch |
| Answer» B. amylopectin starches | |
| 115. |
C-N link in an amino acid is called a |
| A. | polar bond |
| B. | covalent bond |
| C. | ionic bond |
| D. | peptide bond |
| Answer» E. | |
| 116. |
NAD is an abbreviation for |
| A. | Nicotine Abusive Department |
| B. | Nicotine Avoid Directions |
| C. | Nicotinamide adenine dinucleotide |
| D. | Nicotinamide dinucleotide |
| Answer» D. Nicotinamide dinucleotide | |
| 117. |
Lipids are found in |
| A. | Oil, waxes, fats |
| B. | cholesterol, sugar, egg |
| C. | fats, glucose, starch |
| D. | animals starch |
| Answer» B. cholesterol, sugar, egg | |
| 118. |
Basic element of organic compound is |
| A. | hydrogen |
| B. | carbon |
| C. | oxygen |
| D. | All of the Above |
| Answer» C. oxygen | |
| 119. |
Proteins comprises off total dry weight in a cell which is over |
| A. | 60% |
| B. | 50% |
| C. | 70% |
| D. | 40% |
| Answer» C. 70% | |
| 120. |
Activity in which larger molecules are broken down into small molecules utilizing water is known as |
| A. | hydration |
| B. | hydrolysis |
| C. | ionization |
| D. | vaporization |
| Answer» C. ionization | |
| 121. |
Number of amino acids that are found in occurring cells and tissues are |
| A. | 140 |
| B. | 170 |
| C. | 120 |
| D. | 160 |
| Answer» C. 120 | |
| 122. |
First microbe which have completely arranged genome in sequence is |
| A. | Haemophilus influenza |
| B. | influenza |
| C. | hemolytic virus |
| D. | Hepatitis |
| Answer» B. influenza | |
| 123. |
Cellulose constitutes important part of plant cell called |
| A. | cell wall |
| B. | cell membrane |
| C. | mitochondria |
| D. | Golgi complex |
| Answer» B. cell membrane | |
| 124. |
Amount of DNA in a germ cell (sperm or ova) is one half to that of |
| A. | receptive cells |
| B. | brain cells |
| C. | somatic cells |
| D. | meristemetic cells |
| Answer» D. meristemetic cells | |
| 125. |
Monosaccharides obtained as a result of hydrolysis of an oligosaccharides are covalent bond between them, which is called |
| A. | ionic bond |
| B. | covalent bond |
| C. | coordinate covalent bond |
| D. | glycosidic bond |
| Answer» E. | |
| 126. |
In catabolic series of reaction, complex molecules are broken down into smaller molecules releasing |
| A. | water |
| B. | oxygen |
| C. | energy |
| D. | nutrients |
| Answer» D. nutrients | |
| 127. |
A conjugated molecule of glycolipids is made when carbohydrates in cell combine with |
| A. | proteins |
| B. | ions |
| C. | carbohydrates |
| D. | lipids |
| Answer» E. | |
| 128. |
Breakdown of carbohydrate molecule (CₙH₂ₘOₘ) is known as |
| A. | breathing |
| B. | catabolic process |
| C. | anabolic process |
| D. | photolysis |
| Answer» C. anabolic process | |
| 129. |
In digestion process protein molecules are |
| A. | water soluble |
| B. | very large to pass through living membranes |
| C. | need to by hydrolyzed to get digested |
| D. | produce amino acids as the final product |
| Answer» B. very large to pass through living membranes | |
| 130. |
Herbivores can easily digest cellulose in their digestive tract because of |
| A. | pancreatic juice |
| B. | bile |
| C. | microorganisms |
| D. | liver |
| Answer» D. liver | |
| 131. |
Insulin is a primary structure of an amino acid which has two chains containing |
| A. | 51 amino acids |
| B. | 40 amino acids |
| C. | 50 amino acids |
| D. | 30 amino acids |
| Answer» B. 40 amino acids | |
| 132. |
Term carbohydrate means |
| A. | carbon and hydrogen |
| B. | carbonated water |
| C. | hydrated carbon |
| D. | carbon hydroxyl |
| Answer» D. carbon hydroxyl | |
| 133. |
Waxes are also secreted by some |
| A. | animals |
| B. | plants |
| C. | bacteria |
| D. | insects |
| Answer» E. | |
| 134. |
On hydrolysis, sucrose gives one glucose and one |
| A. | fructose |
| B. | maltose |
| C. | lactose |
| D. | ribose |
| Answer» B. maltose | |
| 135. |
Lipids provide insulation against cold and hot weather to exoskeleton of insects in form of |
| A. | cutin |
| B. | waxes |
| C. | cholesterol |
| D. | oil |
| Answer» C. cholesterol | |
| 136. |
Tetroses are not very common, they are found rare in nature and in few |
| A. | viruses |
| B. | bacteria |
| C. | plants |
| D. | animals |
| Answer» C. plants | |
| 137. |
Scientist who first isolated nuclei of pus cells was |
| A. | F.Sanger |
| B. | M.steward |
| C. | F.Miescher |
| D. | A.Einstein |
| Answer» D. A.Einstein | |
| 138. |
A large and important group of compound which can be made by repetition of simple isoprenoid units, is called |
| A. | Terpenoids |
| B. | steroids |
| C. | carotenoids |
| D. | terpenses |
| Answer» B. steroids | |