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Cell Cycle and, Cell Division, , FACT/DEFINITION TYPE QUES, , 1, , 2, , 7., , In cell cycle, DNA replication takes place in, , (a) G, phase (b) G, phase, , (c) Mitotic metaphase (d) S phase, , Which phase of cell cycle is known as quiescent stage ?, , (a) M phase (b) Gy phase, , (©) G, phase (d) S phase, , Interphase includes all of the following except __, , (a) G, phase (b) Anaphase, , (c) S phase (d) G, phase, , Which of the following phase is called the resting phase, , during which cell is preparing for division by undergoing, , both cell growth and replication of DNA?, , (a) M-phase (b) Prophase, , (c) G, phase (d)_ Interphase, , Which of the following phase follows S and G, phases of, , interphase?, , (a) Prophase (b) Metaphase, , (c) Anaphase (d) Telophase, , In mitosis, nucleolus and nuclear membrane disappear, , at, , (a) interphase (b) prophase, , (c) metaphase (d) telophase, , ‘What is the stage of mitosis in which chromosomes are, , arranged on the equator of spindle?, , (a) Anaphase (b) Prophase, , (c) Metaphase (d)_ Telophase, , Best stage to observe shape, size and number of, , chromosomes is, , (a) interphase, , (c) prophase, , In anaphase of mitosis,, , (a) chromosomes get arranged in middle of cell., , (b) nuclear envelope disappears., , (c) chromosome fibres become clear., , (d) chromosomes aggregate at opposite poles to form, daughter nuclei., , (b) metaphase, (d) telophase, , 12., , 13., , 14., , 1S., , 16., , 17., , , , Which of the following cellular structures always, disappears during mitosis and meiosis?, , (a) Plastid and nuclear membrane, , (b) Nucleolus and nuclear membrane, , (c) Endoplasmic reticulum and mitochondria, , (d) Endoplasmic reticulum and plasma membrane, , In meiosis, division is, , (a) Ist reductional and IInd equational., , (b) Ist equational and IInd reductional., , (c) both reductional., , (d) both equational., , Interkinesis is a, , (a) stage between meiosis I and meiosis II., , (b) stage between two mitotic divisions., , (c) interphase., , (d) both (b) and (c), , Synapsis occurs between, , (a) spindle fibres and centromeres., , (b) mRNA and ribosomes., , (c) amale and female gamete., , (d)_ two homologous chromosomes., , During mitosis, nuclear envelope, nucleolous begin to, form and ER to reappear at, (a) prophase (b) late metaphase, , (c) anaphase (d)_ telophase, , The synaptonemal complex appears, , (a) between homologous chromosomes., , (b) in zygotene stage., , (c) composed of DNA + protein., , (d) All of the above, , Chromosome synapsis or bivalent formation occurs in, , , , , , (a) leptotene (b) zygotene, , (c) pachytene (d) diplotene, , Crossing over occurs between, , (a) _ sister chromatids of homologous chromosomes., , (b) non-sister chromatids of homologous chromosomes., , (c) sister chromatids of non-homologous chromosomes., , (d) non-sister chromatids of non-homologous, chromosomes.

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=, , 2, , 27., , Crossing over occurs during, (a) leptotene, , (c) diplotene, Recombination involves, , (a) crossing over, , (b) chromosome duplication, (©) spindle formation, , (d)_ cytokinesis, , Chiasmata are first seen in, , (a) leptotene (b) zygotene, , (c) pachytene (d) diplotene, , In which stage, the chromosomes appear thin and long, thread-like ?, , , , (b) pachytene, (d) diakinesis, , (a) Zygotene (b) Leptotene, (c) Pachytene (d) Prophase, Terminalization occurs during, , (a) mitosis (b) diakinesis, , , , (©) meiosis II (d) cytokinesis, Electron micrographs of which stage indicate that, chromosomes accompanied by the formation of complex, structure called synaptonemal complex?, , (a) Zygotene (b) Pachytene, , (c) Diplotene (d) Diakinesis, , The microtubules of the mitotic spindle attach to a, specializes structure in the centromere region of each, chromosome called the ‘, , Centriole, , (a) Telomere (b), , (©) Chromatin (d)_ Kinetochore, Cell plate grows from, , (a) wall tocentre (b) centre to walls, (c) one wall to another (d) simultaneously, , STATEMENT TYPE QUES, , , , [ky, , Select the correct statement with respect to mitosis., , (a) Chromatids separate but remain in the centre of the, cell in anaphase,, , Chromatids start moving towards opposite poles in, telophase., , (c) Golgi complex and endoplasmic reticulum are still, visible at the end of prophase., , Chromosomes move to the spindle equator and get, aligned along equatorial plate in metaphase,, Which one of the following precedes re-formation of the, nuclear envelope during M phase of the cell cycle ?, , (a) Decondensation from chromosomes, and reassembly of the nuclear lamina., , Transcription from chromosomes, and re-assembly, of the nuclear lamina., , (c) Formation of the contractile ring, and formation of, the phragmoplast., , Formation of the contractile ring, and transcription, from chromosomes., , (b), , @), , (b), , d), , 31., , 32., , piwyy, , Which of the following statement is not true for, , homologous chromosome pairs ?, , (a) They come from only one of the individual's parents., , (b) They usually contain slightly different versions of, the same genetic information., , (c) They segregate from each other during meiosis I., , (d) They synapse during meiosis I., , Which of the following statement(s) is/are true ?, , (a) Cell plate represents the middle lamella between the, , walls of two adjacents cells,, , At the time of cytokinesis, organelles like, , mitochondria and plastids get distributed between, , the daughter cells., , (c) Cytokinesis in plant cell is centrifugal and takes place, by cell-plate formation while animal cells by, furrowing/cleavage and is centripetal., , (d) All of the above, , Significance of mitosis involves, , (a) the growth of multicellular organism., , (b) cell repair., , (c) production of diploid daughter cells with identical, genetic complement., , (d) all of the above, , Which of the following statement(s) is/are correct about, , S-phase (synthetic phase) ?, , (i) Woccurs between G, and G, phase., , (i) It marks the period during which DNA replicates., , (iii) At the end of this phase, DNA is doubled but the, , number of chromosomes remains unchanged., , As the DNA is doubled in this phase number of, , chromosomes is also doubled., , (b), , , , , , (iv), , (v) Centrioles replicate in this phase., (vi) Amount of DNA changes from 2C to4C., (a) (i). Gi). Gv). (Y). (VI) ()_ Gi). Gi). Gli), (W), (Wi), , , , (c) All of the above (d) Only (iv), , Which of the following statements related to G, stage of, , the cell cycle are correct?, , i) It is a quiescent stage., , Gi) In this phase, cell cycle is stopped., , (iii) Go cells do not grow or proliferate but metabolically, active., , (iv) Go cells can divide in response to some stimulus., , (a) (i), and (ii) (b) (i), (ii) and (iii), , (c) Only (i) and (iv) (d) All of the above, , Which one is correct about bivalent ?, , @ __ Bivalentare tetrads., , Gi) A bivalent means 4 chromatids and 2 centromere., , Gi) One bivalent consists of 2 homologous, chromosomes each and sister chromatids., , (iv) Bivalents formation occurs in zygotene., , (a) All of these (b) Only (iii), , (c) (iii) and (iv) (d) Only (iv)

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Cell Cycle and Cell Division, , 34,, , Which one is correct about crossing over/genetic, , Tecombination?, , @ — Wtoccurs in tetrad stage which occurs in pachytene, of prophase I of meiosis 1., , (i) It occurs between non-sister chromatids of, , homologous chromosomes., , Itis recombinase enzyme mediated process,, , It is also the reciprocal transfer of genes between, , the non-homologous chromosomes, , (a) All of the above (b) Allexcept (iv), , (©) Gi), (ii) and (iv) (d) (iii) and (iv), , Read the following statements about cell division and, , select the correct statements., , @ ~~ -M phase represents the Phase when actual cell, division occurs and I phase represents the phase, between two successive M Phase., , Gi) In the 24 hours, average duration of cell cycle of a, , human cell, cell division proper lasts for only about, , an hour., , M phase constitutes more than 95% of the duration, , of cell cycle., , (a) (and (ii), , (c) Gand Gi), , Gi, (iv), , , , (iti), , , , (b) (ii) and (ii, () (i), (ii) and Gi), , , , ASSERTION/REASON TYPE QUESTIONS, , In the following question:, , , , itatement of Assertion is followed, , by a statement of Reason., , (a), (b), (c), , (d), 36., , If both Assertion and Reason are true and the Reason is, the correct explanation of the Assertion., , If both Assertion and Reason are true but the Reason is, not the correct explanation of the Assertion,, , If Assertion is true but Reason is false., , If both Assertion and Reason are false., , Assertion: The stage between two mitotic divisions is, called interkinesis., , Reason: Interkinesis is generally short lived., , Assertion: Diplotene is characterized by the presence of, chiasmata., , Reason: Diplotene can last for months and years in, oocytes of some vertebrates., , Assertion: Interphase occupies 75-95% of the total, generation time., , Reason: Interphase (I-phase) is the long non-dividing, phase., , Assertion: Small disc-shaped structures at the surface of, the centromeres are called kinetochores,, , Reason: Kinctochores serve as the sites of attachment of, spindle fibres to the centromeres., , Assertion: Karyokinesis follows cytokinesis., , Reason: Karyokinesis is the division of cytoplasm into, two daughter cells., , 41., , a, Assertion: The final Stage of meiotic prophase 1 is, diplotene,, , Reason: Diplotene is marked by terminalisation of, chiasmata., , 42. Assertion: The crossing over is an enzyme-mediated, , Process., , Reason: The enzyme involved in crossing over is lyase., , 43. Assertion: Metaphase II begins with splitting of, , 44., , 45., , centromere of each chromosome into two., Reason: In Anaphase II chromosomes align at the equator., , MATCHING TYPE QUESTIONS, , Match the description (given in column I) with correct, , Stage of prophase I (given column II) and choose the, correct option., , Column I Column II, , A. Chromosomes are moved L_ Pachytene, to spindle equator, , B. Centromere splits and I. Zygotene, , chromatids apart, , C Pairing between homologous TL Anaphase, chromosomes takes place, , D. Crossing between homologous IV. Metaphase, chromosomes, , (@@ A-I,B-I;C-M;D-IV, , (b) A-1;B-Ill;C-IV;D-1, , () A-IV:B-Il;C-1;D-1, , (d) A-III;B- -IvV;D-0, , Match the terms (given in column I) with their explanation, , (given in column II) and choose the correct combination, from the options given below., , , , Column Colum IT, (Terms) (Explanation), A. Terminalization 1 Pairing of homologous, chromosomes., B. Synapsis IL Point of attachment between, , homologous chromosomes., Nuclear protein complex that, helps in adherence of sister, chromatids and then, homologous chromosomes., , C Chiasmata m1., , D. Synaptonemal WV. Shifting of chiasmata, outwards, complex towards the ends of a, bivalent., (@) A-IV;B-1,;C-1;D-™, (bo) A-II;B-Il;C-IV;D-I, (c) A- -IV;C-Il,D-I, , , , (@) A-IV;B-1,C-I1;D-1

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=, , 46., , 47., , 49,, , 51., , 52,, , Match the description given in column-I with their stapes, given in column-II and identify the correct answer., , Column-I Cohmn-II, , A. Initiation of the assembly L_ Anaphase, of mitotic spindle, , B. Proteins are synthesized in I. Prophase, , Preparation for mitosis while cell, growth continues., C__ Spindle fibres attach to i., kinetochores of chromosomes., D. Movement of chromatids, towards opposite poles, The correct match is, (a) A-U;B-II;C-IV:D-I, (b) A-III,B-I;C-1;D-Iv, () A-I,;B-I;C-Il;D-IV, @ A-IV;B-II;C-D-0, Select the correctly matched pair., A. S phase - DNAreplication, B Zygotene - Synapsis, C__ Diplotene - Crossing over, D. Meiosis - Both haploid and diploid cells, (a) AandB (b) CandD, (c) BandD (d) AandC, Find the correctly matched pairs and choose the correct, option., , Interphase, , IV. Metaphase, , A. Zygotene - Pairing of homologous, chromosomes, , B. Pachytene - Dissolution of the complex, synaptonemal takes place, , C Diplotene - Bivalent chromosomes appear as, tetrads, , D. Diakinesis - Terminalization of chiasmata, takes place, , (a) AandC (b) AandD, , (c) AandB (d) BandC, , Choose the mismatch pair., , Division of centromere, Division of cytoplasm, , (a) Karyokinesis (b) Cytokinesis =, , (c) S-phase - DNA synthesis, (@) Synapsis - Pairing of homologous, chromosomes, , Find out the wrongly matched pair of the stage of, prophase I with their feature., , (a) Zygotene — Synaptonemal complex, , (b) Pachytene - Mutation, , (c) Diplotene - Chiasmata, , (d) Diakinesis - Terminalization, , Mark the incorrect pair., , (a) Interphase - S-phase, (b) Mphase - Metaphase, (©) MeiosisI - Diplotene, (d) Meiosis 11 - Diakinesis, , Which of the following pair is correctly matched ?, (a) G, - Second growth phase, , (b) S- Duplication phase, , (c)_ G, - Synthesis phase, , (d) Gg - Quiescent stage, , —- es, , 53. Which of the following pair is correctly matched ?, , (a) Anaphase 1 - Homologous chromosomes are, , separated,, , (b) Metaphase I - Pairing of maternal and paternal, chromosomes., , (c) Interphase - A nuclear envelop encloses each, , haploid set of chromosomes., (d) ProphaseI —- Non-homologous chromosomes are, separated., , DIAGRAM TYPE QUESTIONS, , 54. Given below is a schematic break-up of the phases / stages, , of cell cycle with few parts labelled as A, B, C & D., , , , , , Which one of the following is the correct indication of, the stage/phase in the cell cycle?, , (a). C- Karyokinesis (b) D- Synthetic phase, , (c) A-Cytokinesis (d)_B- Metaphase, , 55. Which stages of cell division do the following figures A, , and B represent respectively?, , , , xe 5, , A, , Fig.A Fig.B, (a) A- Metaphase ; B-Telophase, (b) A-Telophase B - Metaphase, (c) A-LateAnaphase ; B-Prophase, (d) A- Prophase ; B-Anaphase, , 56, Given below is the representation of a certain event at a, , particular stage of a type of cell division. Which stage is, shown by the viven fioure?, —,

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0,, , Cell Cycle and Cell Division, (a) Prophase I during meiosis. (a) Late prophase - Chromosomes move to spindle, (b) Prophase II during meiosis. equator., (c) Prophase of mitosis. (b) Metaphase— Spindle fibres attached to kinetochores,, (@)_ Both prophase and metaphase of mitosis. centromeres split and chromatids separate, , 57, Astage in cell division is shown in the figure. Select the (c) Metaphase — chromosomes moved to spindle, answer which gives correct identification of the stage equator chromosomes made up of two sister, with its characteristics. chromatids, , 58., , 59,, , (d) Anaphase — centromeres split and chromatids, separate and start moving away, 60. Choose the diagram which correctly depicts anaphase I., , , , (a) Late anaphase Chromosomes move away from, equatorial plate, Golgicomplex, is not present., , (b) Cytokinesis Cell plate is formed,, mitochondria distributed, between two daughter cells., , (c) Telophase Endoplasmic reticulum and, nucleolus not reformed yet, , (d) Telophase Nuclear envelop reforms,, golgi complex reforms, , The following diagram is of a typical cell cycle indicating, , formation of two cells from one cell., , , , (d), 61. Identify the given figures (A, B & C) showing meiotic, phases and select the correct option., , com, , , , Choose the correct option showing the correct, identification of X, Y, & Z., , (a) X-G,;Y-S;Z-G, (b) X-G,Y-S;Z-G,, (©) X-Gy Y-S,;Z-G, (d) X-G;¥-GyZ-S, A stage of mitosis is shown in the given diagram. Identify, stage with its characteristics?, , , , (a) A-Metaphase B-Anaphase _—_C-Telophase, , (b) A-Metaphase-I B-Anaphase-I C-Telophase-I, (c) A-Metaphase-II B-Anaphase-II C-Telophase-II, (d) A-Anaphase-I B-Metaphase-I_ C-Telophase-I