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1) Which of these changes mark the tolophase in mitosis: a. Chromosomes reaching poles and become thread like b. Nucleolus start reappearing and nuclear membrane reappears c. Both of these changes d. None of these changes
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2) Which of these organelles are not shared by the daughter cells: a. Golgicomplex b. Mitochondria c. Endoplasmic reticula d. Lysosomes
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3) Which of these divisions in necessary for the growth in the animals: a. Amitosis b. Meiosis c. Both (a) & (b) d. None of these
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4) Replacement and repair of body is done through which of these cell divisions: a. Mitosis b. Amitosis c. Meiosis d. None of these
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5) Which of these divisions helps in asexual reproduction of bacteria: a. Amitosis b. Mitosis c. Meiosis d. All of these
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6) Which of these divisions help sex cells to increase in their number: a. Mitosis b. Meiosis c. Both (a) & (b) d. None of these
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7) Mitosis is a regular feature of cells but a sudden as well rapid mitosis leads to formation of: a. New organs b. Cancer c. New Tissues d. None of these
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8) Meiosis is the only division in which: a. Nucleus divides by fission b. Chromosomal number remains unchanged c. Chromosomal number is reduced to half d. Chromosomes undergo longitudinal splitting
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9) Structure present in chromosomes is: a. Nucleolus b. Centromere c. Centrosome d. None of these
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10) Mitotic cell division occurs in: a. Germ cells b. Somatic cells c. Roots only d. Shoots only
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11) Which of these can best explain the significance of meiosis: a. It is essential for sexual reproduction b. It suppresses mutations c. It alternates with mitosis from generations to generations d. It ensures transmission of same genetic material from generations to generations
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12) Nucleous originates from: a. Lysosomes b. Golgi complex c. Mitochondria d. Chromosomes
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13) Mitotic spindle is formed in: a. Amitotic division only b. Mitosis only c. Meiosis only d. Both mitosis and meiosis
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14) Anaphase occurs in: a. Amitosis b. Mitosis c. Meiosis d. Both mitosis and meiosis
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15) Most important significance of mitosis lies in which of these: a. It regulates karyo-cytoplasmic relation b. It reduces chromosomal number to helf c. It doubles the number of chromosomes d. None of these
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16) In a cell the number of chromosomes after first meiotic division is 46, the number of chromosomes in its daughters after completion of the process will be: a. Same b. Doubled c. Half d. None of these
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17) Process of meiosis is seen to occur when a cell: a. Is haploid b. Has attained maximum growth c. Has to undergo sexual reproduction d. Has to form spores
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18) In a cell, the cell division occurs when: a. It is haploid b. It is diploid c. It has attained optimum growth d. It is disintigrating
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19) Daughter cells of meiotic division are haploid which shows: a. That chromosomes are located on genes b. That genes are located on chromosomes c. Genes are located on spindle fibres d. Chromosomes have no genes
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20) The correct sequence of various substages in first meiotic prophase is: a. Leptonema, zygonema, pachynema, diplonema and diakinesis b. Diakinesis, leptonema, zygonema, pachynema and diplonema c. Leptonema, zygonema, diplonema, diakinesis and pachynema d. None of these
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21) The replication of chromosomes occurs in: a. Anaphase b. Telophase c. Prophase d. Interphase
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22) Blueprint of heredity in chromosomes is: a. RNA b. DNA c. Histones d. Proteins
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23) Division of centromeres during mitosis occurs during: a. Prophase b. Metaphase c. Anaphase d. Telophase
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24) During meiotic cell division the centromeres of chromosomes occurs during: a. Anaphase of first meiotic division b. Anaphase of second meiotic division c. Both of these stages d. None of these stages
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25) Division of cytoplasm is termed: a. Karyokinesis b. Cytokinesis c. Karyocytokinesis d. None of them
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26) Nucleic acid forming chromosomes is: a. RNA b. DNA c. AMP d. GMP
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27) Arrangement of chromosomes at equatorial place of spindle occur during: a. Prophase b. Metaphase c. Anaphase d. Telophase
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28) First stage of cell division is marked by: a. Prophase b. Interphase c. Anaphase d. Telophase
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29) DNA polymerase is associated with: a. Process of DNA duplication b. Process of RNA duplication c. Process of protein synthesis d. None of these
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30) When during meiotic cell division, chromosomes first appear duplicated, each bivalent is called: a. Tetramerous b. Tetrad c. Tetraploid d. None of these
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31) A gamete has: a. x number of chromosomes b. 2 x number of chromosomes c. 4 x number of chromosomes d. None of these
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32) A zygote has: a. x number of chromosomes b. 2 x number of chromosomes c. 3 x number of chromosomes d. 4 x number of chromosomes
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33) Number of chromosomes in human karyotype is: a. 23 b. 46 c. 92 d. None of these
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34) DNA duplication is: a. Conservative b. Semiconservative c. Complete d. Incomplete
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35) Which of these marks the beginning of diploid phase in our life cycle: a. Zygote b. Sperm c. Ovum d. None of these
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36) Commencement of diploid phase in the life cycle of an animal is marked by: a. Zygote b. Microspore c. Megaspore d. Embryo
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37) A cell cycle has which of the following phases: a. G1 and G2 - phase b. S - phase c. M or D - phase d. All of these
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38) Interphase is constituted in cell cycle by: a. G1 phase b. G2 - phase c. S - phase d. All of these
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39) Duration of G1 - phase in cell cycle is: a. 5 hours b. 10 hours c. 8 hours d. None of these
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40) Duration of S-phase of cell cycle is: a. 5 hours b. 8 hours c. 10 hours d. None of these
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41) G2 - phase of cell cycle lasts for about: a. 5 hours b. 8 hours c. 10 hours d. 1 hours
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42) M-phase of cell cycle lasts for about: a. 1 hour b. 5 hours c. 8 hours d. 10 hours
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43) During G1 phase of cell cycle there is: a. Synthesis of substances essential for biosynthesis of DNA b. Duplication of DNA c. Growth and duplication of cytoplasm d. Cell division
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44) S - phase of cell cycle is characterized by: a. Duplication of DNA b. Duplication of cytoplasm c. Growth and duplicate d. None of these
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45) Cell division takes place in which of these phases of cell cycle: a. G1 - phase b. S - phase c. G2 - phase d. D - phase
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46) Intact nuclear membrane, chromatin fibres, double DNA etc, characterize which of these phases: a. M - phase b. D - phase c. Interphase d. None of these
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47) The fact that law of biology and genetics can also be applicable to human beings was brought to light by: a. Garrod b. Galton c. Muller d. Weinberg
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48) Who for the first time successfully interpreted alkaptonuria and phenylkeotnuia in man: a. Garrod b. Weinberg c. Muller d. None of these
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49) Who recommended pedigree analysis and twin study for determining human genetic traits: a. Sir Francis Galton b. Weinberg c. Hardy d. Muller
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50) Terms proband, proposita and sibiling are used: a. Male b. Female c. Children d. All of these
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51) In pedigree analysis of which family 50 men were found to be excellent musicians out of 99 men among the descendents: a. Bach family b. Zero family c. Juke of America d. None of these
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52) Identical twins are those which are formed by: a. Complete separation of two blastomeres formed by 1st cleavage b. Simultaneous fertilization of two ova with two sperms c. Incomplete separation of two blastomeres formed by 1st cleavage d. None of these ways
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53) Identical twins are born when: a. Egg cell fails to divide b. Two egg cells are fertilized c. Fertilized egg after 1st cleavage divides into two separate blastomeres d. Egg cell undergoes incomplete division
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54) Twins formed by simultaneous fertilization of two different ova by two separate sperms are called: a. Identical twins b. Fraternal twins c. Siameses twins d. None of these
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55) Dizygotic twins are: a. Identical b. Fraternal c. Both (a) & (b) d. None of these
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56) Fraternal twins are produced when: a. two sperms fertilize an ovum and the blastomeres after 1st cleavage separation completely b. Two ova are fertilized simulataneously by two different sperms c. One sperm fertilizes an ovum and two blastomeres of 1st cleavages separate completely d. None of these things happen
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57) Nature of identical twins is: a. Dizygotic b. Monozygotic c. Polyzygotic d. Amphizygotic
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58) Identical twins develop from: a. An ovum fertilized by two sperms b. An egg developing from parthenogenesis and its blastomeres separating from each other c. Fertilization of two ova simulataneously by two ova simulataneously by two sperms d. A single fertilized egg whose blastomeres separating after 1st cleavage
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59) A patient of alkaptonuria can be recognized by the: a. Urine having homogentisic acid in his urine b. Urine turning black on expossure to air c. Both of these things d. None of these
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60) Alkaptonuria is an inborn biochemical disorder in which the person excretes: a. Albumen b. Homogentisic acid c. HCI d. Acetic acid
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