MCQOPTIONS
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MCQOPTIONS
This section includes 1212 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which one of these is a set of useful insects? |
| A. | Sandfly , butterfly, hoeybee |
| B. | Sikmoth, honeybee, locust |
| C. | Honeybee, silkmoth, tsetse fly |
| D. | Honeybee , lac insect, cochineal insect |
| Answer» E. | |
| 52. |
Which one of these structures involved in replication of bacterial dna? |
| A. | chromosomes |
| B. | pilli |
| C. | plasmid |
| D. | mesosome |
| Answer» E. | |
| 53. |
Which one the following fatty acid is more soluble in an organic solvent and has higher melting point____________? |
| A. | Acetic acid |
| B. | Butyric acid |
| C. | Palmitic acid |
| D. | All have same |
| Answer» D. All have same | |
| 54. |
Which organisms are sometimes called the ” pastures of the sea”? |
| A. | Diatoms |
| B. | Radiolarians |
| C. | Dinoflagellates |
| D. | Foraminiferans |
| Answer» B. Radiolarians | |
| 55. |
Which Part of the Brain Regulates Body Temperature? |
| A. | cerebellum |
| B. | cerebrum |
| C. | hypothalamus |
| D. | medulla |
| Answer» D. medulla | |
| 56. |
Which statement about enzyme is incorrect_________________? |
| A. | Some of them consist solely of protein with no non protein part |
| B. | They catalyze a chemical reaction without being utilized |
| C. | All enzymes are fibrous Proteins |
| D. | They without their cofactor are called apoenzyme. |
| Answer» D. They without their cofactor are called apoenzyme. | |
| 57. |
Which statement correctly describes the transcription of DNA? |
| A. | It produces another DNA molecule |
| B. | It produces mRNA |
| C. | It is a semi conservation process |
| D. | It occurs at surface of ribosomes |
| Answer» C. It is a semi conservation process | |
| 58. |
Which statement is incorrect about Lock and Key Model________________? |
| A. | Specific enzyme can transform only a specific substrate |
| B. | Active site of an enzyme is a non flexible structure |
| C. | Active site does not change before during or even after the reaction |
| D. | It explains the mechanism of every chemical reaction |
| Answer» E. | |
| 59. |
Which statement is incorrect for cloning? |
| A. | The nucleus of a fertilized egg is replaced by the nucleus from the cell of a fully developed individual |
| B. | Division of a single egg into one or more separate embryos. |
| C. | The individual is the mirror image of the parent organism |
| D. | It involve methods of sexual reproduction |
| Answer» E. | |
| 60. |
Which statement is incorrect for pasteurization? |
| A. | It is used to preserve yogurt and milk |
| B. | It was developed by Louis Pasteur. |
| C. | It involves heating the substance at high temperature for just few sec. |
| D. | It can be used to preserve vegetables and meat. |
| Answer» E. | |
| 61. |
Which statement is true about an aqueous medium________________? |
| A. | Ionic as well as non ionic substance in aqueous media retains their identity |
| B. | Enzymes can not perform catalysis reaction in this medium |
| C. | Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions |
| D. | It is less favorable media for chemical reactions |
| Answer» D. It is less favorable media for chemical reactions | |
| 62. |
Which step causes activation of catalytic site of an enzyme__________________? |
| A. | Change in pH of the surroundings |
| B. | Formation of Enzyme Susstrate complex |
| C. | Change in the charge of the active site |
| D. | Change in temperature |
| Answer» C. Change in the charge of the active site | |
| 63. |
Which structure of protein gives information aboutnumber and sequence of amino acids in it_______________? |
| A. | Primary structure |
| B. | Secondary structure |
| C. | Tertiary structure |
| D. | Quaternary structure |
| Answer» B. Secondary structure | |
| 64. |
Which structural organization is most common in globular proteins____________? |
| A. | Primary |
| B. | Secondary |
| C. | Tertiary |
| D. | Quaternary |
| Answer» D. Quaternary | |
| 65. |
Which system is present in nematodes? |
| A. | Sac – like digestive system |
| B. | Tube – like digestive system |
| C. | Circulatory system |
| D. | Respiratory system |
| Answer» C. Circulatory system | |
| 66. |
Which treatment is instituted in a cancerous patient? |
| A. | Antibiotic therapy |
| B. | Radiotherapy |
| C. | Gene therapy |
| D. | None of these |
| Answer» C. Gene therapy | |
| 67. |
Which type of motions are present in solid? |
| A. | translational |
| B. | rotational |
| C. | vibrational |
| D. | all of these |
| Answer» D. all of these | |
| 68. |
Which type of sensory structures carry deep pressure and vibration sensations______________? |
| A. | Hair end organs |
| B. | Meissner’s Corpuscles |
| C. | Pacinian corpuscles |
| D. | none of these |
| Answer» D. none of these | |
| 69. |
Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips___________________? |
| A. | Hair end organs |
| B. | Meissner’s Corpuscles |
| C. | Pacinian corpuscles |
| D. | None of these |
| Answer» C. Pacinian corpuscles | |
| 70. |
Which type of the receptors are present in the ear__________________? |
| A. | Chemoreceptors |
| B. | Mechanoreceptors |
| C. | Photoreceptors |
| D. | Thermoreceptors |
| Answer» C. Photoreceptors | |
| 71. |
Which Vitamin is needed for the formation of a light-sensitive pigment in the retina. |
| A. | Vitamin A |
| B. | Vitamin C |
| C. | Vitamin D |
| D. | B complex |
| Answer» B. Vitamin C | |
| 72. |
Who coined the term Animalcules for microorganisms like Bacteria and protozoa______________? |
| A. | Robert Koch |
| B. | Louis Pasteur |
| C. | Alexander Fleming |
| D. | Leeuwenhoek |
| Answer» E. | |
| 73. |
Who coined the term CELL? |
| A. | Schwann |
| B. | Schleiden |
| C. | Robert Hook |
| D. | Both a and b |
| Answer» D. Both a and b | |
| 74. |
Who developed the vaccine against anthrax? |
| A. | Louis Pasteur |
| B. | Edward Jennar |
| C. | Leuvenhoek |
| D. | Alexander Fleming |
| Answer» B. Edward Jennar | |
| 75. |
Who discovered the bacteria causing tuberculosis and also developed various techniques of media preparation and maintenance of pure culture_____________? |
| A. | Robert Koch |
| B. | Louis Pasteur |
| C. | Alexander Fleming |
| D. | Leeuwenhoek |
| Answer» E. | |
| 76. |
Who discovered the living cell first time? |
| A. | Robert brown |
| B. | Robert hooke |
| C. | Rudolf virchow |
| D. | Antoni van leeuwenhoek |
| Answer» C. Rudolf virchow | |
| 77. |
Who discovered the peptic ulcer causing bacteria H.PYLORI? |
| A. | Robert Hook |
| B. | James parkinson |
| C. | Dr Barry Marshall and dr Robin Warren |
| D. | None of these |
| Answer» D. None of these | |
| 78. |
Who first observed and thus hypothesized that new cells are formed from previously existing living cell? |
| A. | Theodor Schwann and Schleiden |
| B. | Rudolph Virchows |
| C. | Louis Pasteur |
| D. | Both b and c |
| Answer» C. Louis Pasteur | |
| 79. |
Who first separated bacteria from other protists as a group_____________? |
| A. | John Hogg |
| B. | Ernst Haeckel |
| C. | Margulis and Schwartz |
| D. | Herbert Copeland |
| Answer» E. | |
| 80. |
Who is Called the Father of Demography? |
| A. | ALAN Turing |
| B. | John Dalton |
| C. | Charles Babbage |
| D. | IBN KHALDUN |
| Answer» E. | |
| 81. |
Who opposed the idea the cell is an empty space bounded by thick wall? |
| A. | Lorenz Oken |
| B. | Schwann |
| C. | Robert Brown |
| D. | Rudolph Virchow |
| Answer» D. Rudolph Virchow | |
| 82. |
Whone is not the function of endoplasmic reticulum? |
| A. | Nerve impulse conduction |
| B. | Transport of material |
| C. | Mechanical support |
| D. | Synthesis of conjugated molecules |
| Answer» E. | |
| 83. |
Why skeletal muscles are called striated muscles? |
| A. | They appear darker than smooth muscles by naked eye |
| B. | Alternating dark and light bands appear on their surface when visualized by naked eye |
| C. | Alternating dark and light bands appear on their surface when visualized via a microscope |
| D. | All of these |
| Answer» D. All of these | |
| 84. |
With different chemical arrangements and formation Of complex molecules, the life emerges on the level of the ? |
| A. | Cells |
| B. | Tissues |
| C. | Organs |
| D. | Organ System |
| Answer» B. Tissues | |
| 85. |
Xanthophylls are _________ pigments |
| A. | Yellow |
| B. | Red |
| C. | Orange |
| D. | Green |
| Answer» B. Red | |
| 86. |
XO-XX pattern of sex determination is present in______________? |
| A. | Grasshopper |
| B. | Butterfly |
| C. | Drosophila |
| D. | Man |
| Answer» B. Butterfly | |
| 87. |
Xylem and phloem are conducting tissues found in ……….? |
| A. | animals |
| B. | plants |
| C. | micro orgamnisms |
| D. | all the above |
| Answer» C. micro orgamnisms | |
| 88. |
Yellow cytoplasm in ascidian gives rise to______________? |
| A. | Epidermis |
| B. | Muscle cells |
| C. | Gut |
| D. | Notochord |
| Answer» C. Gut | |
| 89. |
Yeasts reproduce asexually by forming____________? |
| A. | Asci |
| B. | Basidia |
| C. | Both a & b |
| D. | Buds |
| Answer» E. | |
| 90. |
Yellowish glandular structure which produces progesterone is_____________? |
| A. | Graffian follicle |
| B. | Ovary |
| C. | Corpus luteum |
| D. | Placenta |
| Answer» D. Placenta | |
| 91. |
Zygote with three copies chromosome 21, is known to cause _________? |
| A. | Hay fever |
| B. | Scurvy |
| C. | Parkinson Disease |
| D. | Downs syndrome |
| Answer» E. | |
| 92. |
Which of the following statements about fractures in old age is incorrect? |
| A. | They are more common than in adult age |
| B. | Occur as a result of bone being thin and weak |
| C. | Due to good blood supply it results in quick healing |
| D. | It involves osteoblasts and osteocytes |
| Answer» D. It involves osteoblasts and osteocytes | |
| 93. |
Which of the following statement is incorrect5 for fats containing unsaturated fatty acid_____________? |
| A. | They contain double bond |
| B. | They are usually solid at room temperature |
| C. | They are lighter than water |
| D. | Their specific gravity is less than 1 |
| Answer» C. They are lighter than water | |
| 94. |
Which of the following statement is incorrect regarding the locomotion in Euglena? |
| A. | Move with the help of flagellum, attached to the anterior pole of the body. |
| B. | Flagellum whipping backwards moving the organism forward, and when moves forward the organism moves backward. |
| C. | Myonemes can change the direction of the body by making it to shorten from anterior to the posterior pole. |
| D. | None of these |
| Answer» C. Myonemes can change the direction of the body by making it to shorten from anterior to the posterior pole. | |
| 95. |
Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________? |
| A. | A specific organism can always be found in association with a given disease |
| B. | The organism can be isolated and grown in pure culture in the laboratories |
| C. | The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do s |
| D. | It is possible to recover the organism in pure culture from the experimentally infected animals |
| Answer» D. It is possible to recover the organism in pure culture from the experimentally infected animals | |
| 96. |
Which of the following statement is incorrect about RNA_________________? |
| A. | The pentose sugar in it is Ribose. |
| B. | It contains Adenine Guanine Thymine and Cytosine |
| C. | It is present in the nucleoli |
| D. | It may be folded back on itself to give double helical characteristics. |
| Answer» C. It is present in the nucleoli | |
| 97. |
Which of the following statement is incorrect about Molluscans? |
| A. | They are surrounded by single or double pieces of hard skeleton |
| B. | Their shell grows as the animal grows |
| C. | They have hydrostatic skeleton |
| D. | They move by tube feet |
| Answer» E. | |
| 98. |
Which of the following statement is incorrect about Glyoxisomes? |
| A. | They contain enzymes which help in conversion of fatty acids into carbohydrate |
| B. | They are abundant in soyabeans but absent in pea |
| C. | They are present through out life of a plant and provide them whth energy through Glyoxylate cycle |
| D. | They are signle membranous organelles |
| Answer» D. They are signle membranous organelles | |
| 99. |
Which of the following statement is incorrect about asexual reproduction by spores in fungi? |
| A. | Spores are haploid structures |
| B. | They are dispersed via wind water and insects |
| C. | On falling to a suitable place they germinate |
| D. | These are produced through fruiting bodies like ascocarps and basidiocarps. |
| Answer» E. | |
| 100. |
Which of the following statement is incorrect about antibiotics? |
| A. | They are used against microorganisms |
| B. | They are always effective against bacteria |
| C. | They are used in diseases like tuberculosis and pneumonia |
| D. | They are derived from bacteria only |
| Answer» E. | |