Practice Test


Q1) "Every cell arises from pre-existing cells". This is the famous generalisation of Show Answer


Q2) A series of changes or sequential events which occur regularly in a dividing cell is called Show Answer


Q3) Cell cycle was discovered by Show Answer


Q4) A cell divides in order to Show Answer


Q5) The cell become viscous and refractive for the first time in Show Answer


Q6) During which phase are proteins for spindle fibers synthesized ? Show Answer


Q7) Cell division of bacteria is Show Answer


Q8) DNA replication takes place in Show Answer


Q9) The stage between two successive mitotic divisions is called as Show Answer


Q10) Restriction point is also called as Show Answer


Q11) Doubling of genetic material takes place is Show Answer


Q12) Chromosomal replication occurs during Show Answer


Q13) The cell may withdraw from cell cycle after mitosis and it will enter into Show Answer


Q14) Cell stops dividing, once it goes to Show Answer


Q15) Histone proteins are synthesized in Show Answer


Q16) S phase of cell division is characterised by Show Answer


Q17) Interphase is considered as a Show Answer


Q18) M phase is also called as Show Answer


Q19) Abnormal, unlimited and uncontrolled cell division results in Show Answer


Q20) ________ is the second phase in cell cycle. Show Answer


Q21) Histones are synthesized in Show Answer


Q22) The cells do not divide further in Show Answer


Q23) In a somatic cell which is ready to divide, the DNA Show Answer


Q24) Synthesis of macromolecules for the formation of cell organelles occurs in Show Answer


Q25) In cell cycle S phase follows Show Answer


Q26) A cell cycle consists of Show Answer


Q27) In a somatic cell cycle Show Answer


Q28) In cells, centrioles occur Show Answer


Q29) During cell cycle RNA and proteins are synthesized in Show Answer


Q30) In which type of cell division does the nuclear membrane remain throughout the division ? Show Answer


Q31) Out of the following, which is called quiescent stage ? Show Answer


Q32) Amitosis is seen in Show Answer


Q33) Important character of amitosis is Show Answer


Q34) The term mitosis was introduced by Show Answer


Q35) Mitosis occurs in Show Answer


Q36) Mitosis is also called as Show Answer


Q37) Equational division is Show Answer


Q38) The shortest phase in the cell cycle is Show Answer


Q39) Old and worn out tissues are replaced due to Show Answer


Q40) The diploid somatic cell divides by Show Answer


Q41) Karyokinesis is Show Answer


Q42) In which type of cell division two identical daughter cells are formed ? Show Answer


Q43) Chromosomes are equally distributed among daughter cells during Show Answer


Q44) Which division is called somatic cell division ? Show Answer


Q45) Which statement is true about mitosis ? Show Answer


Q46) On which part of chromosome, is force exerted at the time of seperation of replicated chromosome ? Show Answer


Q47) Nuclear membrane disappears during Show Answer


Q48) During prophase Show Answer


Q49) Chromosome undergo dehydration and coiling during Show Answer


Q50) Nuclear membrane and nucleolus disappear at Show Answer


Q51) Which part of the cell disappears during mitosis ? Show Answer


Q52) At the end of which stage, do cells under microscope and do not show Golgi bodies, nucleous and nuclear membrane ? Show Answer


Q53) Chromosomes show various shapes during Show Answer


Q54) Which is the longest phase in mitosis ? Show Answer


Q55) What happens in the prophase of mitosis ? Show Answer


Q56) In animal cells, the centriole starts moving in opposite direction, till they occupy polar positions in _______ phase of cell division. Show Answer


Q57) In plant cells, the spindle apparatus is Show Answer


Q58) ________ is characterised by the formation of kinetic spindle. Show Answer


Q59) Chromosomes are arranged on equational plate during Show Answer


Q60) Spindle fibers are attached to chromosomes in the region of Show Answer


Q61) The spindle fibers arises from Show Answer


Q62) Longest stage in M -phase of cell cycle is Show Answer


Q63) Astral rays are formed of Show Answer


Q64) Mitosis is observed in Show Answer


Q65) Spindle formation starts in Show Answer


Q66) Microtubules are involved in Show Answer


Q67) In which stage are chromosomes arranged at the equator ? Show Answer


Q68) The stage of mitosis when the chromosomes move towards the pole is Show Answer


Q69) The shortest phase in mitosis is Show Answer


Q70) Two sister chromatids are attached with Show Answer


Q71) Astral rays are produced from Show Answer


Q72) Separation of chromosomes starts at Show Answer


Q73) Which is NOT TRUE for anaphase of mitosis ? Show Answer


Q74) Nuclear membrane reappers in Show Answer


Q75) Reappearance of nuclear membrane, disappearance of spindle fibers, formation of chromatin network are the characters of Show Answer


Q76) In which phase of mitosis, do disappearance of spindle fibres and reappearance of nucleolus occur ? Show Answer


Q77) In mitosis, the nucleoli reappears during Show Answer


Q78) How many equational divisions are necessary in a cell of onion root tip to form 128 cells ? Show Answer


Q79) The main significance of mitosis is that Show Answer


Q80) What is true about mitosis ? Show Answer


Q81) Spindle fibers are composed of Show Answer


Q82) Division of cytoplasm is called Show Answer


Q83) Karyokinesis is the division of Show Answer


Q84) In animal cell, cytokinesis takes place by Show Answer


Q85) The region of chromosome to which spindle fibres are attached is called Show Answer


Q86) Organelle important in spindle formation during nuclear division is Show Answer


Q87) Growth of organisms takes place due to Show Answer


Q88) Replication of centriole takes place in Show Answer


Q89) The centromere of chromosomes gives rise to a fibre from either side of its surface called as Show Answer


Q90) Anastral mitosis is observed in Show Answer


Q91) The most suitable plant material to study mitosis is Show Answer


Q92) Centromere is a part of Show Answer


Q93) When a unicellular zygote forms multicellular organism, _________ division takes place. Show Answer


Q94) Mitosis of plant and animal differs in Show Answer


Q95) The fibers which extend between the centromeres of daughter chromatids are called Show Answer


Q96) The stage at which cleavage or cytokinesis begins in animal cell is Show Answer


Q97) Which of the following is related with cell division ? Show Answer


Q98) Post-mitotic gap phase is also known as Show Answer


Q99) Meiosis is also known as Show Answer


Q100) Meiosis is associated with Show Answer


Q101) Meiosis has evolutionary significance because it results in Show Answer


Q102) In meiosis haploid condition is maintained by which stage ? Show Answer


Q103) The spindle formation is completed and occupied nuclear region during ______ phase. Show Answer


Q104) In meiosis I, the centromere Show Answer


Q105) The period between meosis I and meosis II is called Show Answer


Q106) When paternal and maternal chromosomes mutually exchange their material in cell division, the event is called Show Answer


Q107) Which event is not associated with prophase I ? Show Answer


Q108) Which one of the following structures will not be common to meiotic cells of higher plants ? Show Answer


Q109) Cell division in sexual reproduction is Show Answer


Q110) In meiosis actual reduction of chromosome takes place in Show Answer


Q111) The longest phase in meiotic division is Show Answer


Q112) Anaphase I differs from anaphase II in Show Answer


Q113) Meiosis term was coined by Show Answer


Q114) The chromosomes are thin and long thread - like during Show Answer


Q115) Process of synapsis is seen is Show Answer


Q116) Pairing of homologus chromosomes is called Show Answer


Q117) Bivalents are formed during Show Answer


Q118) During which phase do chromosomes start length-wise contraction ? Show Answer


Q119) Structure formed in Zygotene stage of meiosis, which helps in crossing over is called Show Answer


Q120) During which sub stages of prophase I of meiosis are bivalents and DNA replication respectively found ? Show Answer


Q121) During which stage of meiosis is synapsis formed ? Show Answer


Q122) During ________ phase, two homologous chromosomes start moving towards opposite poles. Show Answer


Q123) Disjunction is Show Answer


Q124) Seperation of homologus chromosomes at the end of anaphase I is called Show Answer


Q125) During telophase I, Show Answer


Q126) A short resting period between meiosis I and meiosis II is called Show Answer


Q127) Interkinesis is followed by Show Answer


Q128) The complex formed by a pair of synapsed homologous chromonosome is called Show Answer


Q129) Terminalization of chiasmata takes place during Show Answer


Q130) Chiasma formation begins at Show Answer


Q131) Meiotic crossing over involves Show Answer


Q132) Chiastama represents the site of Show Answer


Q133) Crossing over is Show Answer


Q134) When paternal and maternal chromsomes change their materials with each other in cell division, this event is called Show Answer


Q135) Crossing over may results in Show Answer


Q136) Recombination between homologus chromosomes is completed by the end of Show Answer


Q137) During _________ phase chromosomes shorten due to coiling. Show Answer


Q138) Chromosome number is reduced to half during Show Answer


Q139) Exchange of characters between maternal and paternal chromosomes occur during Show Answer


Q140) Zygotic meiosis is found in Show Answer


Q141) Meiosis I separates Show Answer


Q142) The division of centromere in meiosis takes place at Show Answer


Q143) The interphase between meiosis I and meiosis II, when present is called Show Answer


Q144) Meiosis II is similar to Show Answer


Q145) Meiosis of a diploid cell produces Show Answer


Q146) Meiosis is a process in which the chromosome duplicate _________ and cell divides _______. Show Answer


Q147) Meiosis is responsible for Show Answer


Q148) Terminaliztion of chiasmata occurs in Show Answer


Q149) During sexual reproduction, which type of cell division maintains the number of chromosomes ? Show Answer


Q150) Dyads are characteristic of Show Answer


Q151) Which type of cell division takes place in gonads ? Show Answer


Q152) Among different stages of prophase I, which one is the longest ? Show Answer


Q153) Celllular structure which always disappears during mitosis and meiosis is Show Answer


Q154) Gametes contain Show Answer


Q155) The pairing of homologus chromosomes in meiosis is known as Show Answer


Q156) Synaptonemal complex is formed during Show Answer


Q157) How many meiotic divisions are required to produce 200 pollen grains ? Show Answer


Q158) The points of crossing over are known as Show Answer


Q159) How many times does cytokinesis take place during meiosis ? Show Answer


Q160) In which stage do chromosomes appear as thin long threads ? Show Answer


Q161) Chromosome number is restored by Show Answer


Q162) The four daughter cells produced at the end of meiosis are Show Answer


Q163) Diploid chromosome number is 8. What shall be the number of chromatids in each daughter cell after meiosis I ? Show Answer


Q164) The haploid condition is produced by Show Answer


Q165) DNA content is doubled during Show Answer


Q166) Generation time represents period of Show Answer


Q167) The sequence of cell cycle is Show Answer


Q168) Generation time is Show Answer


Q169) How many mitotic divisions are required to form 64 cells from one cell ? Show Answer


Q170) Which of the following represents the best stage to view the shape, size and number of chromosomes ? Show Answer


Q171) Out of the following which is NOT a correct pair ? Show Answer


Q172) If a somatic cell of a plant contains 24 chromosomes, the number of chromosomes present in the gamete will be Show Answer


Q173) Correct sequence of various stages of prophase I is Show Answer


Q174) For the formation of 120 pollen grains how many reduction divisions are required ? Show Answer


Q175) 200 eggs are produced by _______ meiotic divisions. Show Answer


Q176) Which one of the following is the CORRECT pairing with reference to prophase I of meiosis ? Show Answer


Q177) What is the number of chromosome in a diploid organism in which N=12, at the end of meiosis I ? Show Answer


Q178) Number of chromosome groups at the equator of metaphase I of a plant cell, if 2N=60 chromosomes, will be Show Answer


Q179) The second meiotic division leads to Show Answer


Q180) In meiosis, chromosome number becomes Show Answer


Q181) Consider the following statements about plant cytokinesis
I. It usually occurs by cell plate method
II. The spindle usually persists during cytokinesis
III. Cell plate grows centrifugally
Which of the statements given above are correct? Show Answer


Q182) I. …A… phase corresponds to the interval between mitosis and initiation of DNA replication
II. In animal cells, during the …B… phase, DNA replication begins in the nucleus and the centriole duplicates in the cytoplasm
III. During the …C… phase, proteins are synthesized for the preparation of mitosis, while cell growth continues
Identify the blanks (A-C) to complete the given statements (I-III) with reference to NCERT textbook Show Answer


Q183) Which type of cell division helps in regeneration of cells? Show Answer


Q184) Which of the following statement(s) is/are not correct about meiosis?
I. Meiosis involves pairing of homologous chromosomes and recombination between them
II. Two diploid cells are formed at the end of meiosis-II
III. Meiosis involves two sequential cycles of nuclear and cell division called meiosis-I and meiosis-II, but only a single cycle of DNA replication
IV. Meiosis-I is initiated after the parental chromosome replication which produce identical sister chromatids at the S-phase
The correct option is Show Answer


Q185) Crossing over occurs during Show Answer


Q186) During meiosis, the alleles of the parental pair separate or segregated from each other. How many allele(s) is/are then transmitted to a gamete? Show Answer


Q187) The phragmoplast is organized at the Show Answer


Q188) The morphology of chromosomes can be studied most easily in Show Answer


Q189) The number of chromosomes becomes half in Show Answer


Q190) In which of the following phase of cell cycle, mitotic division got arrested? Show Answer


Q191) Which of the following phase of cell cycle is also known as the resting phase? Show Answer


Q192) Differentiated cell remains at which stage? Show Answer


Q193) Choose the correct combination of options to select the correct statement for prophase
I.Chromosomal material condenses to form compact mitotic chromosomes
II.The assembly of mitotic spindle is initiated by the microtubules
III.Cells do not show organelles when viewed under the prophase
IV.The nucleolus or nucleoli degenerate completely Show Answer


Q194) Which of the following event distinguishes prophase-I of meiosis from prophase of mitosis? Show Answer


Q195) During mitosis, number of chromosomes gets Show Answer


Q196) I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II.Nuclear envelope assembles around the chromosome clusters
III.Nucleolus, Golgi complex and ER reform Above features indicates which phase of mitosis Show Answer


Q197) What would be the change in the chromosome number, during S-phase? Show Answer


Q198) Arrange the following events of meiosis in a correct sequence and choose the correct option
I.Terminalisation
II.Crossing over
III.Synapsis
IV.Disjunction of genomes Show Answer


Q199) What is the approximate percentage duration of cell cycle that comes under interphase in humans? Show Answer


Q200) Which of the following stage of meiosis is responsible for deciding genetic constitution of gametes? Show Answer


Q201) …A…. mitotic cell division is only seen in the diploid somatic cells, while the …B… can show mitotic divisions in both haploid and diploid cells.
Identify A and B form the options given below Show Answer


Q202) In meiosis, the chromosome number Show Answer


Q203) The phase between two successive M-phase is called Show Answer


Q204) At the end of meiosis-II, number of haploid cells formed are Show Answer


Q205) The transition between meiosis-I and meiosis-II is Show Answer


Q206) Synapsis occurs between Show Answer


Q207) In which stage of cell division, chromosomes are most condensed? Show Answer


Q208) Which of the protein is found in spindle fibre? Show Answer


Q209) During cell division, sometimes there will be failure of separation of sister chromatids. This event is called Show Answer


Q210) Which type of chromosomes segregate when a cell undergoes meiosis? Show Answer


Q211) Term ‘meiosis’ was proposed by Show Answer


Q212) Crossing over that results in genetic recombination in higher organisms occurs between Show Answer


Q213) In which of the following stage of the cell cycle, the attachment of spindle fibres to kinetochores of chromosomes occurs? Show Answer


Q214) The sequence of events by which a cell duplicates its genome, synthesizes the other constituents of the cell and eventually divides into two daughter cells is termed as Show Answer


Q215) In animal cell has, cytokinesis involves Show Answer


Q216) Which is correct for meiotic metaphase-I? Show Answer


Q217) Crossing over is the exchange of genetic material between Show Answer


Q218) Which of the following phase of the cell cycle is not a part of interphase? Show Answer


Q219) Colchicine arrests which of the following stage of cell division? Show Answer


Q220) Small disc-shaped structures at the surface of the centromeres that appear during metaphase are Show Answer


Q221) Meiosis in AaBb will produce gametes Show Answer


Q222) The stage between two meiotic division is called Show Answer


Q223) Chromosome number can be doubled by using which of the following? Show Answer


Q224) Dictyotene a is prolonged Show Answer


Q225) Which of the following is unique to mitosis and not a part of meiosis? Show Answer


Q226) During which stage of meiosis, do tetrads line up at the equator? Show Answer


Q227) The anaphase promoting complex is activated by Show Answer


Q228) A cell plate is laid down during Show Answer


Q229) During which stage of meiosis, do the sister chromatids begin to move towards the poles? Show Answer


Q230) In a cell cycle, which structures serves as the site of attachment of spindle fibres? Show Answer


Q231) Which of the following serves as mitotic spindle poison? Show Answer


Q232) Chromosomes are visible with chromatids at which phase of mitosis? Show Answer


Q233) Give the name of the phases of meiosis, in which
I.the chromosome number is reduced to haploid state
II.the amount of DNA is reduced to haploid state The correct option is Show Answer


Q234) What type of cell division takes place in the functional megaspore initially in angiosperms? Show Answer


Q235) Which of the following statements are correct for multicellular cell division?
I.Cell division brings about embryonic development and growth
II.It plays a role in repair and maintenance of the body
III. It is important for reproduction The correct option is Show Answer


Q236) Meiosis involves two sequential cycles of …A… called meiosis-I and meiosis-II but only a single cycle of …B…
Identify A and B to complete the given statement Show Answer


Q237) DNA replicates Show Answer


Q238) Select the correct sequence of a cell cycle Show Answer


Q239) Mitosis or the equational division is usually restricted to …A… cells. However, in some lower plants and in some social insects …B… cells also divide by mitosis.Choose the correct option for A and B from the given options Show Answer


Q240) The spindles are formed of Show Answer


Q241) During mitosis, ER and nucleolus begin to disappear at Show Answer


Q242) The plane of alignment of chromosome at the metaphase stage of cell cycle is referred to as the Show Answer


Q243) From the following, identify the two correct statements with reference to meiosis
I. Bead-like structures are absent on chromosomes
II. Displacement of chiasmata occurs in diakinesis
III. Separation of two basic sets of chromosomes
IV. No division of centromere The correct option is Show Answer


Q244) Separation of linked genes is called Show Answer


Q245) Sequence of four phases of cell cycle is Show Answer


Q246) The division of the cytoplasm is termed as Show Answer


Q247) Cell would normally proceed to mitosis without interruption Show Answer


Q248) The two chromatids of a metaphase chromosome represent Show Answer


Q249) In the process of mitotic division during interphase, chromosome material remains in the form of very loosely coiled threads called Show Answer


Q250) Which of the following occurs more than one and less than five in a chromosome? Show Answer


Q251) Longest phase of meiosis, is Show Answer


Q252) Crossing over is also an enzyme mediated process and the enzyme involved is called Show Answer


Q253) Which one of the following stages corresponds to Mendel’s law of independent assortment? Show Answer


Q254) Which stages of mitosis is known for occurrence of cytokinesis? Show Answer


Q255) Characteristic of meiosis is Show Answer


Q256) The number of mitotic cell divisions required to produce 256 cells from single cell would be Show Answer


Q257) The second check point in cell cycle occurs at Show Answer


Q258) The M-phase starts with the …A…, corresponding to the separation of daughter chromosomes, known as …B… and usually ends with division of cytoplasm which is known as …C… Identify A-C to complete the given NCERT statement Show Answer


Q259) DNA replication in a cell cycle occurs during Show Answer


Q260) When parental and maternal chromosomes change their material with each other in cell division, this event is called Show Answer


Q261) Which of the following stage is responsible for the appearance of Lampbrush chromosomes? Show Answer


Q262) Chiasmata are most appropriately observed in meiosis during Show Answer


Q263) In which of the following stages, the chromosome is single thin and like long thread? Show Answer


Q264) From the following, identify the two correct statements with reference to meiosis
I.Bead like reference to meiosis
II.Displacement of chaismata occurs in diakinesic
III. Separation of two basic sets of chromosomes
IV. No division of centromere
The correct option is Show Answer


Q265) Which of the following stage of cell cycle is known as quiescent stage? Show Answer


Q266) At which stage of mitosis, chromatids separated and passes to different poles? Show Answer


Q267) When dividing cells are examined under a light microscope, chromosomes become visible in Show Answer


Q268) Phenomenon of crossing over in diploid organisms is responsible for Show Answer


Q269) Karyokinesis refers to the division of Show Answer


Q270) Which of the following statements are correct for cell cycle?
I. Cell cycle is the sequence of events involving growth and division of a cell from the time of its formation to its own division into daughter cells
II. Cell growth (in terms of cytoplasmic increase) is a continuous process
III. DNA synthesis occurs only during one specific stage in the cell cycle
IV. The replicated chromosomes (DNA) are distributed to daughter nuclei during cell division Show Answer


Q271) In which stage of the first meiotic division, two sister chromatids are formed? Show Answer


Q272) Mitosis usually results in the Show Answer


Q273) Which of the following type of cell cycle is known as equational division? Show Answer


Q274) The complete disintegration of nuclear envelope in a cell cycle marks the Show Answer


Q275) Chromosomes are arranged along the equator during Show Answer


Q276) What is the average duration for mitosis? Show Answer


Q277) When synapsis is complete all along the chromosome, the cell is said to have entered a stage called Show Answer


Q278) ‘XX’ is a phase of mitosis, in which the chromatin condenses into discrete chromosomes. During ‘XX’ phase, nuclear envelope breaks down and spindles forms at opposite ends of the cell.Identify ‘XX’ Show Answer


Q279) Mitosis is divided into Show Answer


Q280) Which of the following statements (events) is/are true for mitotic telophase? Show Answer


Q281) Identify A-C in the given statements, and choose the correct option
I. Spindle microtubules that extend from the two poles of a dividing cell are called …A…
II. A centromere connects two identical copies of a single chromosomes. These two copies are called …B…
III. In ‘X’ phase, the paired chromosomes separate and begin moving to opposite ends of the cell. This ‘X’ is called …C… Show Answer


Q282) The interphase is divided into three main phases. There phases are Show Answer


Q283) In which of the following stages of the cell cycle chromosome number becomes half? Show Answer


Q284) The proteins involved in the movement of chromosomes towards the poles during cell division are Show Answer


Q285) Which of the following specie’s haploid cell has maximum chromosome counts? Show Answer


Q286) Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle? Show Answer


Q287) Synaptonemal complex is formed during Show Answer


Q288) During cell division, chromosome attaches with spindles Show Answer


Q289) The spindle microtubules are polar, their orientation is Show Answer


Q290) The non-sister chromatids twist around and exchange segments with each other during Show Answer


Q291) Two basic stages of cell cycle are Show Answer


Q292) The S-phase of cell cycle is characterized by Show Answer


Q293) Congression is a phenomenon of Show Answer


Q294) Find the correctly matched pairs and choose the correct option
I. Leptotene – The chromosomes become invisible
II. Zygotene – Pairing of homologous chromosomes
III. Pachytene – Dissolution of the synaptonemal complex takes place
IV. Diplotene – Bivalent chromosomes appear as tetrads
V. Diakinesis – Terminalisation of chiasmata takes place Show Answer


Q295) Meiosis occurs in which of the following cells? Show Answer


Q296) In …A…. phase, there is synthesis of RNAs and proteins that are needed for cell growth and replication of DNA. While it is …B… phase, where synthesis of protein occur that is needed for spindle formation and mitosis to continue.Identify A and B to complete the given statement Show Answer


Q297) Read the following statements and select the correct option
I. M-phase represents the phase when the actual cell division or mitosis occurs
II. Interphase represents the phase between two successive M-phases
III. In the 24 hrs average duration of cell cycle of a human cell, cell division proper lasts for only about an hour
IV.The M-phase lasts more than 95% of the duration of cell cycle Show Answer


Q298) What change would occur in DNA content, during S-phase? Show Answer


Q299) In meiosis, the daughter cells are not similar to that of parent because of Show Answer


Q300) During cell cycle, RNA and non-histone proteins are synthesized in Show Answer


Q301) Alleles of different genes that are on the same chromosome may occasionally separated by a phenomenon known as Show Answer


Q302) In meiosis, division is Show Answer


Q303) Choose the correct answer for the statements given below
I. Protein involved in the shortening and thickening of chromosome fibres
II. The name of early prophase when elongated chromosomes occur in overlapped condition like a ball of wool without their ends being visible
III. Each group of astral rays along with its centriole pair
IV. Name the narrow point which is responsible for attaching two sister chromatids to each other Show Answer


Q304) If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into? Show Answer


Q305) In cell cycle, during which phase chromosomes are arranged at equatorial plate? Show Answer


Q306) When number of chromosomes is already reduced to half in the first reductional division of meiosis, what is the necessity of second meiotic division? Show Answer


Q307) Select the correct option Show Answer


Q308) During meiotic division, the Show Answer


Q309) Recombination is involved in the process of Show Answer


Q310) A diploid living organism develops from zygote by which type of the following repeated cell divisions? Show Answer


Q311) Pick out the correct statements
.I.Synapsis of homologous chromosomes takes place during prophase-I of meiosis. II.Division of centromeres takes place during anaphase-I of meiosis.
III.Spindle fibres disappear completely in telophase of mitosis.
IV.Nucleoli reappear at telophase-I of meiosis. Show Answer


Q312) The term ‘meiosis’ was given by Show Answer


Q313) After the separation of centromeres during mitosis, the chromatids move towards opposite poles of the spindle. Name the term used for these chromatids Show Answer


Q314) In which phase, proteins for spindle fibre are synthesized? Show Answer


Q315) In meiosis-I, a bivalent is an association of Show Answer


Q316) Chiasmata are formed due to Show Answer


Q317) Which of the following shows diplotene stage of cell cycle? Show Answer


Q318) Select the event of cell cycle which shows the importance of synapsis and the formation of chiasmata Show Answer


Q319) Mitosis is a process by which eukaryotic cells Show Answer


Q320) Mitosis is characterized by Show Answer


Q321) Choose the correct sequence of two main events in mitosis Show Answer


Q322) What is the correct sequence of the steps given here? Also work out the process depicted in the steps?
I. Homologous chromosomes move toward opposite poles of the cell; chromatids do not separate.
II. Chromosomes gather together at the two poles of the cell and the nuclear membrances reform.
III. Homologous chromosomes pair and exchanges segments.
IV. Homologous chromosomes align on a central plate.
V. The haploid cells separate completely. Show Answer


Q323) What is the nature of cells formed at the end of meiosis-II? Show Answer


Q324) The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes is Show Answer


Q325) What is the function of centromere? Show Answer


Q326) The cell cycle of yeast takes about Show Answer


Q327) What is not seen during mitosis in somatic cells? Show Answer


Q328) At which stage of cell cycle colchicine arrests the spindle? Show Answer


Q329) Arrange the following events of meiosis in the correct sequence.
1.Terminalization
2..Crossing over
3.Synapsis
4.Disjunction of genomes
The correct sequence is

Show Answer


Q330) Spindle fibre is made up of Show Answer


Q331) Diakinesis is marked by Show Answer


Q332) Cleavage is a unique form of mitotic cell division in which Show Answer


Q333) Meiosis occurs in organism during Show Answer


Q334) Chromosome reaches their respective poles in which of the following stages of mitosis? Show Answer


Q335) Replication of centriole occurs during Show Answer


Q336) Genetic recombination is due to Show Answer


Q337) Pick out the correct statements.
I.Mitosis takes place in the somatic cells and meiosis takes place in the germ cells
II. During mitosis, the DNA replicates once for one cell division and in meiosis the DNA replicates twice for two cell divisions.
III. Mitosis and meiosis occur both in sexually and asexually reproducing organisms. Show Answer


Q338) Chromatid formation takes place in Show Answer


Q339) 56 cells are produced in meiosis where first division is Show Answer


Q340) A cell in post reproductive stage remains in Show Answer


Q341) Most cytogenic activities occur during Show Answer


Q342) The term, mitosis was coined by Show Answer


Q343) Which of the following character is related with telophase? Show Answer