biology Mcqs
51. Un-separated replica of chromosome is called___________?
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A. Kinetochore

B. Chromatid

C. Chromatin

D. Centromere

52. Functional unit of DNA Is____________?
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A. Nucleus

B. Nucleolus

C. Chromosomes

D. Genes
53. An antibody is made of _________ polypeptide chains?
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A. 2

B. 4

C. 1

D. 3

54. The term biology was introduced in__________ in 1800?
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A. Italy

B. Germany

C. Turkey

D. Japan

55. In animals coordination is achieved by means of_________?
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A. Respiratory system

B. Nervous system

C. Endocrine system

D. Both b and c
56. Which character differentiates living things from non-living organisms?
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A. They live in the same ecosystem.

B. They are highly organized and complex made of one or more cells and contain genetic material

C. They are acted upon by the same environment

D. Both a and b

57. Which one is not correct for a productive theory?
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A. It discourages suggestion of different hypotheses

B. It has explanatory power

C. None of these

D. It is predictive

58. Proteins are made from amino acids by the process of ______________?
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A. Hydrolysis

B. Pinocytosis

C. Active transport

D. Dehydration synthesis
59. Which character differentiates living things from non-living organisms___________?
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A. They live in the same ecosystem.

B. They are acted upon by the same environment

C. They are highly organized and complex made of one or more cells and contain genetic material

D. Both a and b

60. Most cell membranes are composed principally of ?
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A. Protein and Lipids

B. Protein and RNA

C. DNA ad protein

D. Protein and Chitin

61. Kingdom Protoctista includes____________?
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A. protists

B. Fungi

C. Piantae

D. Prokaryotes

62. In which animal respiratory surface are found in more than one organ?
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A. human

B. birds

C. fish

D. frog
63. Communities are ________ collection of organisms?
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A. Dynamic

B. None of these

C. Static

D. May be static or dynamic

64. With different chemical arrangements and formation Of complex molecules, the life emerges on the level of the ?
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A. Organ System

B. Organs

C. Tissues

D. Cells
65. The molecules of living matter that provide building blocks are mostly based on:
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A. Nitrogen

B. Carbon

C. Hydrogen

D. Ammonia

66. All of the following are elements that plants need in very small amounts except___________?
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A. Chlorine

B. Hydrogen

C. Copper

D. Iron

67. Intake of liquid material by cell membrane is called___________?
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A. Endocytosis

B. Exocytosis

C. Phagocytosis

D. Pinocytosis
68. A large regional community primarily determined by climate is called__________?
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A. Population

B. Habitat

C. Community

D. Biome
69. ___________ is used to relieve one kind of headache, migraine?
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A. Lovastatin

B. Ergotin

C. Cyclosporine

D. Pencillin

70. The major cell infected by the HIV is lymphocyte ?
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A. helper-T

B. B

C. both T and B

D. none of these

71. Which disease can be controlled by vaccination?
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A. Cancer

B. Diabetes

C. Measles

D. Heart attack

72. Unbroken series of organisms arranged from ancestor to descendant sequence is____________?
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A. Evolutionary line

B. Phyletic lineage

C. Biodiversity

D. Connecting link

73. PCR stand for _________?
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A. Peptide chain reaction

B. Polymerase chain reaction

C. Pentapeptide chain reaction

D. Poly carbomyl reaction

74. The heart is enclosed in a membrane called________?
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A. peritoneum

B. pericardium

C. pleura

D. epithelium

75. If bile pigments are prevented from leaving digestive tract, then they cause_____________?
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A. Hepatitis

B. Gall stones

C. Jaundice

D. Blockage

76. Organelles are_______________?
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A. Non-cellular structures

B. Unicellular structures

C. Multi-cellular structures

D. Sub-cellular structures
77. Operculum is present in_____________?
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A. none of these

B. sea fish

C. cartilaginous fish

D. bony fish
78. Polysome is formed during __________ process?
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A. Transcription

B. Secretion

C. Division

D. Translation
79. Enterobius vermicularis is commonly known as____________?
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A. Tapeworm

B. Pinworm

C. Flatworm

D. Hook worm

80. Crop rotation helps in______________?
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A. Soil Infertility

B. Slowing of crops growth

C. Eradication of disease

D. Growth of pathogens

81. Malaria is associated with___________?
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A. Culex Mosquito

B. Culiesta Mosquito

C. Anopheles Mosquito

D. Culex & Anopheles Mosquito

82. Which one of them is a micro-molecule?
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A. Protein

B. Hemoglobin

C. ATP

D. Polysaccharide

83. Pox viruses are_________?
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A. DNA enveloped

B. RNA non-enveloped

C. RNA enveloped

D. DNA non-enveloped

84. Who discovered the living cell first time?
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A. Robert hooke

B. Antoni van leeuwenhoek

C. Robert brown

D. Rudolf virchow

85. Earthworm is included in_____________?
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A. Kingdom Plantae

B. Kingdom Animalia

C. Kingdom Protoctista

D. Kingdom Monera

86. A group of similar cells that perform a specific function is:
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A. Organ System

B. Organelle

C. Organ

D. Tissues
87. ___________ is concerned with cell secretions?
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A. Lysosomes

B. Golgi complex

C. Cell membrane

D. Endoplasmic reticulum

88. Group of living organisms of the same species living in the same place at the same time is called ?
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A. Ecosystem

B. Community

C. Population

D. Biome

89. ______________ of earth surface is covered with water?
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A. 90%

B. 75%

C. 30%

D. 10%

90. The main types of plastids are___________?
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A. Chromoplasts

B. All of these

C. Chloroplasts

D. Leucoplasts

91. _____________________ contains the green chemical called chlorophyll.
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A. Cytoplasm

B. Cell membrane

C. Vacuole

D. Chloroplasts
92. Steps Involved in scienti?c method are ?
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A. Hypothesis >Accumulated data > observation & experimentation > conclusion

B. Accumulated data New data Observation & experimentation Hypothesis > Conclusion

C. Accumulated data > Hypothesis > Observation & experimentation > New data > Conclusion

D. New data > Conclusion > Accumulated data > Observation & experimentation

93. Fungi resemble plants because they lack___________?
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A. Nucleus

B. Centriole

C. Cytoplasm

D. Cell wall

94. Destruction of all life forms is called___________?
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A. Disinfection

B. Sterilization

C. Preservation

D. Antisepsis

95. Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called________________?
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A. Physiology

B. Atomic biology

C. Biochemistry

D. Molecular biology

96. In 1831, the presence of nucleus in the cells was reported by__________?
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A. Robert Brown

B. Robert Hooke

C. Robert Mug Abe

D. Robert Koch

97. Alternation of generations is absent in___________?
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A. Hydration

B. Jelly fish

C. Physalia

D. Obelia

98. Robert Hooke discovered_____________?
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A. Cell

B. Mitochondria

C. Nucleus

D. DNA

99. Exact replica of chromosome refers to ___________?
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A. Centromere

B. Kinetochore

C. Chromatid

D. Arms

100. _________________ cells of phloem are directly involved in transport of organic solutes?
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A. Companion cell

B. Tracheid

C. Sieve element

D. Parenchyma