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1) A special area of centromere with specific base arrangement and specific proteins where spindle fibers are attached is called a. Chromatin b. Aster c. Kinetochore d. Primary constriction
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2) Each kinetochore gets ________ fibers in mitosis a. 5 b. 4 c. 3 d. 2
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3) Most critical phase of mitosis is a. Prophase b. Anaphase c. Metaphase d. Telophase
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4) Reverse of prophase is a. Interphase b. Metaphase c. Anaphase d. Telophase
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5) In plants mitotic apparatus consists of a. Centriole b. Centriole and asters c. Centrioles, asters and spindles d. Spindles only
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6) Which statement is not true about phragmoplast? a. Formed from vesicle originating from Golgi apparatus b. Present in plants only c. Formed at the end of anaphase d. Centre of dividing cell
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7) Spread of tumor cells and establishment of secondary areas of growth is a. Benign tumors b. Cancer c. Metastasis d. Epistasis
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8) Which is a feature of malignant tumor? a. Localized b. Little deleterious effects c. Few mitosis d. Metastasize
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9) Feature of cancer cells in common? a. High nucleus to cytoplasmic ratio b. Prominent nucleoli c. Many mitosis d. All of these
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10) Meiosis occur in a. Diploid cells only b. Haploid cells only c. Both diploid and haploid cells d. Monoploid cells only
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11) Meiosis occurs at the time of a. Gamete formation in animals b. Spore formattion in plants c. Growth in animals d. Both a and b
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12) Interphase of meiosis lacks a. G0 phase b. G1 phase c. G2 phase d. S phase
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13) Homologous chromosomes are a. Similar and identical b. Identical but not similar c. Not similar and not identical d. Similar but not identical
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14) The longest phase of meiosis I is a. Metaphase b. Anaphase c. Prophase d. Telophase
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15) Tetrad or bivalent is a. Paired homologous chromosome but not fused complex structure b. 2 unpaired homologous chromosome c. Paired and fused complex structure d. None of these
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16) Pairing of homologous chromosomes is completed in a. Leptotene b. Zygotene c. Pachytene d. Diplotene
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17) Each bivalent has a. 3 chromatids b. 4 chromatids c. 5 chromatids d. 2 chromatids
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18) Crossing over occurs between a. Sister chromatids b. Non sister chromatids c. Independent chromatids d. Each and every chromatid
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19) Inability of chromosomes to segregate during anaphase and telophase of meiosis is called a. Crossing over b. Chromosomal disjunction c. Chromosomal nondisjunction d. None of these
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20) Which statement is incorrect? a. Down's syndrome involves autosome b. In Turner's syndrome 2n-1 c. In Klinefelter's syndrome XYY d. In Down's syndrome sperms are commonly involved
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21) Apoptosis a. Cell death due to tissue damage b. Causes inflammation c. Internal programme of events by which cell commits suicide d. Damages neighboring cells
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22) A cell of human being has 46 chromosomes; it divides to form some daughter cells, each having 23 pairs of chromosomes. The division would be a. Mitosis b. Meiosis c. Amitosis d. Budding
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23) Mitosis takes place during a. Healing of wound b. Development and growth c. Vegetative propagation d. All of these
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24) Which of the following category comes under Turner's syndrome? a. A male having 2 X chromosomes b. A female having 3 X chromosomes c. A male having only 1 Y chromosome d. A female having only 1 X chromosome
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25) Morphology of chromosomes is best studied during a. Telophase b. Metaphase c. Prophase d. All of these
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26) Cytokinins refers to a. Division of nucleus b. Division of cytoplasm c. Division of cell d. All of these
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27) Which fibers intedigitate with each other? a. Astral fibers b. Kinetochore fibers c. Kinetochore fibers d. All of these
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28) Cancer cells are a. Differentiated b. Undifferentiated c. Highly differentiated d. Less differentiated
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29) Crossing over in meiosis occurs during a. Zygotene b. Pachytene c. Dislotene d. Diakinesis
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30) Which division does not show replication of chromosomes? a. Mitosis b. Meiosis I c. Meiosis II d. None of these
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31) A significant happening of meiosis is / are a. Crossing over b. Random assortment c. Both of these d. None of these
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32) Jacob's syndrome can be represented as a. XO b. XXX c. XXY d. XYY
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33) Unbroken series of organisms arranged from ancestor to descendant sequence is a. Biodiversity b. Phyletic lineage c. Connecting link d. Evolutionary line
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34) Out of total organisms on earth, ______ are vascular plants a. 53.10% b. 19.90% c. 17.60% d. 9.40%
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35) Control of organisms by using living organisms is called a. Bioremediation b. Integrated disease management c. Antisepsis d. Biological control
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36) Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called a. Molecular biology b. Physiology c. Biochemistry d. Atomic biology
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37) _______ is the potential surce of chemical energy for cellular activities a. C-H bond b. C-O bond c. C-N bond d. P-O-C bond
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38) Percentage of water in brain cells is a. 20% b. 65% c. 85% d. 89%
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39) Breakdown of large molecules into smaller ones utilizing water molecules is a. Hydration b. Hydrolysis c. Dehydration synthesis d. Electrolysis
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40) A chemical substance that reacts with enzyme but is not transformed into product and thus blocking active site is called a. Substrate b. Co-factor c. Inhibitor d. Promotor
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41) Intake of liquid material by cell membrane is called a. Endocytosis b. Exocytosis c. Phagocytosis d. Pinocytosis
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42) Ribosomes were discovered by a. Golgi b. De Duve c. Palade d. R.Brown
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43) _______ is concerned with cell secretions a. Endoplasmic reticulum b. Golgi complex c. Lysosomes d. Cell membrane
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44) Cytoskeleton involved in assembly and disassembly of the spindle during mitosis is of a. Microtubules b. Microfilaments c. Intermediate filaments d. None of these
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45) Reverse transcriptase is present in a. All RNA viruses b. All DNA viruses c. All retroviruses d. All viruses
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46) Pox viruses are a. RNA non-enveloped b. RNA enveloped c. DNA non-enveloped d. DNA enveloped
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47) Bacteria which grow either in the presence or absence of oxygen a. Aerobic bacteria b. Anaerobic bacteria c. Facultative bacteria d. Microaerophilic
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48) Destruction of all life forms is called a. Sterilization b. Disinfection c. Antisepsis d. Preservation
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49) _______ is used to relieve one kind of headache, migraine a. Pencillin b. Lovastatin c. Cyclosporine d. Ergotin
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50) The single healthy megaspore retained within the megasporangium germinates to form an egg containing female gaemtophyte called a. Ovule b. Seed c. Fruit d. Embroyo sac
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